Yah know, Eric, you do always say, "...even the criticism..." Dude, there is nothing to criticize. My wrenching days are long over, yet my Saturday evening is would not be the same without an I DO CARS fix. No dissing, only kudos. Thank you!
Never say never. After retiring I got tired of honey do lists and towing a trailer around the country. I bought a hobby car and have really enjoyed turning wrenches on it.
Hey so I actually service BMWs almost exclusively here in Charleston I own JU Automotive. Where you said that the oil filter housing wasn’t the cause but the affect of overheating I can almost guarantee that it is the cause of the overheat. They typically break in that spot and do cause overheating and sometimes mix oil and coolant or vise versa. Love you !
Some questions for you: (1) how frequent is the injector issue where they could hit collide somehow? (2) do you think the plastics in this engine will fail like past bmws from heat cycling? (3) what are odds someone will need to get to timing components before 200k miles?
@@neilquinnI only have knowledge on diesel powered BMW engines. 1) Injectors on those are pretty sturdy, a bad injector happens pretty rarely in my experience. 2) The plastics on all the cars will eventually start to deterioate and break/crack, in my case on my F10 530d I had to change the plastic coolant tube that attaches on the left side of the head, that bastard was shooting coolant all around (everything's fixed now). 3) Timing chain should last 200k miles or a little more, but you'd have to consider changing it earlier than that, I myself have 245k km / 150k miles on the odometer, haven't yet changed the chain, timing system looks to be healthy. Regular oil changes help reduce the risk of timimg related issues - I change oil every 10-12k km (6-8k miles)
Automotive Engineer for Honda here. Those BMW motors are pretty solid. Toyota uses them in the base Supra. The rod bearings looking like new at 100,000 miles kind of proves that. BMW makes some great engines. It's the emissions regulators and accounting teams that force us to use plastic cooling systems. It's not just BMW. If you don't replace the cooling system at 100,000 for any car past 2008, you're on borrowed time.
I agree that the metal machined parts of this B48 engine look rugged and extremely well made and machined. Lots of savings could be made by making things less well and still last well enough. But no, some dinglebunny accountant comes along, you claim, and tells the engineers "Ve must sev 5 cents by using a plastic water pump impeller". Right, that and three bucks will get me a cup of what passes for coffee these days. Makes no sense no matter how one looks at it. Emissions? A water pump impeller made of plastic that lasts forever in a dump, if not in the engine. A metal one is easily recyclable. I look at that "oil cooler" and see O-rings tortured into crazy shapes on the block used as oil "seals". Suddenly, German rationality is ditched. Look at Honda screwing the J35 with DI, using $3 injectors that fail at 50K miles, as South Main Auto has shown. Honda sells a cheapo six pack even at its dealers for this "wear" item. Plus who knows how much labor to replace them, when it's only a 30 minute job, according to happy mechanics reporting in at beating the book rate by a country mile. Hell, the timing belt lasts twice as long. I've seen accountants at work, and they generally come round to reason, and blaming "emissions" for use of plastic parts is pure hogwash -- nothing, I mean NOTHING, to do with it. Discarded plastic in landfills lasts for ever,; scrap metal is easily recycled. You're not getting your excuses past me, I'm an engineer too. I mean, even the most cost-cut engine I've seen here, the Hyundai 1.6 turbo, made out of spider webs and 1 mm thick alloy lasts 100K miles. So these robust BMW engines have to have built-in failure points -- on purpose. Same with everyone else. Otherwise we have to assume engineers are all Jekyll and Hydes, which is absurd. Like running rubber toothed belts in oil at Ford and VW, and those useless DI injectors at Honda. Or VW using expensive special iron on their otherwise dog's breakfast of a 2.0 liter turbo four. That's the stupidest mechanical design I've seen torn down on this channel -- a complete nightmare. Much as I hate to agree with Internet opiners, I see a conspiracy to produce junk. 95% good, and then crap that will obviously fail. Not the way my mechanical engineering career went, but it wasn't in automotive which seems like scam city.
Toyota/Lexus UR, GR series entered the chat. Not trying at argue with an engineer but this is to prove your point that some companies accounting teams are interested in using higher quality rubber hoses and not using plastic water pumps, like Toyota, Honda, Mazda and Subaru. Maybe even Mitsubishi although it is a dying breed.
@@Methylphenidate2803 Oh how naive you are. Toyota/Mazda/Subaru are all using the same cheap processes. It's called injection 3D molding. No company is using plastic water pumps as of 2009 either. What they tried is using plastic impellers for a while. "Higher quality rubber" is so painfully incorrect. All manufacturers such as BMW, Toyota, and whoever use the same quality rubber". Generally, quality companies like Continental will make the hoses. The big differentiator is that a performance car tends to run at higher temperatures naturally. Your average Toyota is tuned to underperform generally compared to something like a Camaro SS. Thus, it will make that rubber last a bit longer. Finally... You should really be replacing these "high quality rubber" parts every 8-10 years on any car. Not doing so means you aren't too knowledgeable on how a car works and are on borrowed time. Gaskets/hoses/etc. degrade with heat and lose mass. It wasn't until the last 5-7 years that new materials were compounded to better tackle this issue, but those are all aftermarket. This is one of those moments where it's better to remain silent than to speak and assure someone you are not informed.
@@BillMalcolm-tn3kq You're not wrong. ALL companies are 100% taking shortcuts. I blame it on regulations and greed mainly. The US wants 70& of a car to be able to rot into the earth environmentally after its use. What does this mean? It means corn-based plastics and shortcuts just to be able to produce a car.
I love how I can just come sit down with my Sunday morning coffee for video upload that's just NICE. No shouting, no drama (except throwing shade at manufacturers), just some relaxing wrenching
That's my experience with E30s too. But then that's almost the case with old cars I've had. I've replaced radiators, water pumps, thermostat, cooling and heater core hoses on my 30 year old Celica too. However I can say the Toyota will run without issues despite having coolant leaks compared to the E30 325i I used to drive.
Is it expensive to change the cooling system? Parts and labour? Also, how frequently would you suggest doing it? I barely drive 5k miles per year and based in the UK. I’m considering buying a 2019 F30 320i with the B48 engine , and with less than 50K miles on the clock, and just trying to learn as much as I can so I can keep on top of things. Thanks ✌🏼
Dude! My wife loves to listen to you in the background and watches all you're tensioner and water pump shenanigans. Today she has suggested that you need a clear safety tote (she even gave it a Rev 3 designation!) for your convenience. She actually has learned a ton about engines and to my surprise has even spoke about engine topics while we're driving down the freeway! Keep up the great work!
I’ve had 5 BMWs from a 1996 535i and to the 2015 X5 with the 6 I’m driving today. I’ve only had one give me trouble on the road. A 2000 323i that gave up its alternator at 235,000 miles. I think it’s to be forgiven. It sounds like some of you guys have had bad experiences but I really haven’t.
Give me my 2004 Lincoln Town Car 4.6L 2 Valve. Three or Four years ago I had the mandatory heater hose nipple break off on the interstate. I lost all coolant. I only noticed when power reduced as it went into the "Air Cooled" mode running on 4 cylinders and 4 pumping air. Got it off the road safely with reduced power. I had the intake and hoses replaced, refilled coolant and that is it. Total repair was $600 done by a professional mechanic. it is now 20 years old and 225,000 miles. No check engine lights. Drives and looks new, only the drivers seat gives its age away. Ill change that soon enough.
Don't get me started on how great the Lincoln Town car is for people that don't want to spend a lot of repairs. My best friends had 6 TCs between them. Yes, they had some bad ones but only because they absolutely abused them. The 4.6 is absolutely solid
This is what would make me the most nervous about buying any vehicle with these engines. Timing guides failed on these in the past. I can't imagine the cost of a full engine out repair.
All of the "technology" already exists. Cam in valve cover. Fuel pump in valve cover. Rear timing. Water pump behind timing cover. Wet timing belt. Boom, you're pulling the engine every 60k. Awwyeah. Ford will probably do it first, if their recent abominations are any indication.
I saw a drift race engine builder use the side of the engine to mount it to the engine stand. Used an adapter plate like you would for the rear but setup to use the motor mount instead
I like your balanced, factual, philosophical, non judgemental theories and conclusions when summarising the probable reason for the overall engine failure. I'd say manufacturers could learn a lot from your teardowns, it's often hard to predict what will fail when designing an engine and easy to apportion blame after the event. That said, the use of plastics, for whatever the reason, appear to be the weak link most of the time. At least this engine appears to be much improved, when compared to previous versions.
Stumbled across this video today researching a used X3, which also uses the B48. This is really nice work... staight forward, detailed, factual, no drama, no forced humor. Keep it up!
As always Eric, thanks for the Saturday night entertainment. Happy Memorial Day everyone, and thank you to those who paid the ultimate price for our freedom.
An engine condemned for a blown head gasket. In my day (60's and 70s) that would have been $100 to $200 to R & R the heads plus $80 to rework the heads. (New valves and springs and milling the head level. The only way we would throw the engine away would be if the block itself was warped, extremely rare.
The problem is that these small displacement turbo engines have a very high specific power output so there is LOTS of pressure and heat involved. When a head gasket fails it’s usually pretty cataclysmic. I lifted a head on a late-model small turbo motor from preignition and it ended up spraying coolant right out of the side of the engine. The scary part was that once things returned to normal the bolts still had enough tension to allow the steel shim gasket to seal and it even passed a compression and leak-down test. But, the reduced bolt tension allowed trace amounts of coolant and exhaust to seep by, which eventually would end up trashing the engine due to coolant contamination and rust. If you catch it right away it’s fixable, but by the time it gets to this point, it’s cooked.
sure, they were ruggedly simple...and that's about it. Not necessarily powerful unless you had a swimming pool worth of displacement, drank through tanks like no ones business, and many still weren't even all that reliable. Many vehicles past the 90s, specially many Japanese ones, will gladly eat up miles upon miles. Hell, even my old BMW got beaten on daily and had over 160,000 miles on it. Engine purred like a kitten and pulled smoothly. This all comes at a cost. You can't just fix modern cars in your backyard like you could back in the day.
I really want to thank you for your videos. It's very relaxing to watch your videos at the end of a hard day of work. Again, thank you so much. God bless you and your family
I would love to see you tear down a 2.4 SRT4 that came in the 2003 Chrysler PT Cruiser GT with the aluminum intake. If you can get your hands on one. Great video as usual.
My n20 328 i 2013 just past 100000 miles, zero problem, still original all parts of engine. Only replace front shocks. F30 excellent car, super reliable engine…
The turbo heat cycles on that engine warped the engine block, it's common on all turbo applications where the turbo is directly mounted to the center of the exhaust manifold.
Looking at the the build quality being much better than that Subaru engine you recently tore down is interesting. Unfortunate that BMW uses cheap plastic for their cooling system.
I was once told that European cars used “bio degradable” plastic engine parts vs “recyclable” plastic parts on other brands. Might be true: on my M54 Bimmer you WILL replace the coolant expansion tank every 60k. Or else….. Meanwhile my ‘11 F150 Ecoboost went 160k on the original “de-gas bottle”, it being strong as day one when I traded it.
Another great episode, Eric, thanks so much !!! As an old fart (real old) I'm amazed at the complexity of today's modern engines. And to me, so much unneeded complexity, and all for what? Increased power, fuel economy, etc??? I'm just stuck in the past, I guess, and reminiscent of the multitude of American small block V8's (trouble-free) I owned and drove the bejesus out of, from shore to shore.
4:05 - Stephan Papadakis did a whole build series on his B58-powered drift car quite a while back, and he welded up a bracket for side-mounting the engine on his stand. It seems like the only safe way to do it while retaining access to the timing chain components.
We sell these quite well. The fwd engines are more expensive than the rwd versions. The problems i usually find are blown head gaskets and cracked pistons. If there is a loss of compression in one ir the cylinders then you have a crack in the piston between the rings.
As a owner of a 25 X3 with a b48 I feel confident with proper maintenance this engine will be very reliable. BMW has also made additional improvements for the 48 and 58 this year.
Good to see the condition of the internals on this B48, as I have one in my 2018 MINI Cooper S. Well, actually mine is a B46, but they should be the same, right? At 50k miles now, no issues whatsoever, and it doesn't seem to burn hardly any oil, maybe 1/2 quart of RedLine 5W30 Euro TD oil between my 5k oil/filter changes. I just switched over to Mobil 1 5W30, so we'll see if that continues. The B48 timing chain location definitely had me a bit frightened, as the timing components on my 2011 N18 MINI Cooper S were supposed to be rather weak, although mine seems to be fine at 127k miles now. I did have a head gasket failure on my N18 at like 88k miles, combustion gases into cooling system (much like the failure on this B48 you tore down), but that was on me due to not correctly bleeding the cooling system after a coolant change. I couldn't find a local place to resurface that head, so I bought a good used 38k mile head from a Euro auto salvage joint, all new BMW gaskets and such (no timing components except the upper chain guide and the TTY bolts that needed replacing on the cam gears etc.) and all has been good since then. Thanks, Eric, for the great tear-down videos! Keep them coming, man! Take care, and stay cool.
I have a B46c in a ‘20 Mini Countryman. It only has 30k miles and we barely drive it so I pray it doesn’t cause me heart ache anytime soon. So far so good with it though. Also have the ‘20 S58 X4M with 23k miles. No issues there either. I just keep the oil changed 🤷🏽♂️
As I used to own a 2018 X2, I found this teardown interesting. It's too bad it's not possible to tell why it overheated with certainty, the leaking water pump is high up on my list of suspects. I think you''re right that the owner didn't run it completely to death, but the check engine light must have been on for a while given how hot it got. It looks like the engine can be rebuilt with the block being decked and perhaps also the head. Not sure why you're surprised that it has balance shafts. I4 engines all have secondary imbalance and I would be surprised if anyone makes an I4 without balance shafts. The x-pattern on the bores is called crosshatch, but surely you know that. Were you looking at something else? It was thoughtful of you to let the water pump spend a few minutes in the passenger seat of your M3 before it goes to the crusher.
Another commenter who works with these engines stated that the burnt through plastic water to oil cooler housing DOES melt and dumps the coolant in seconds...right where that hole was on the one Eric took off! Time for an aftermarket ali housing to be manufactured???
i have a 2018 330 with a b48, very cool to see the internals. i think its a generally pretty well built engine, due in part to input from toyota as you can get this engine in the supra. forged crank and connecting rods and arc/lds coated cylinders. there are folks pushing 500hp reliably with the some of the later gens.the cooling system can be problematic, specifically the line to the expansion tank which had a recall.
I think thats the case with this engine here on video they tunned Pressure got to high for gasses to leak. I have same engine and is solid. Only when engine is cold little rattling from waste gate, + i had to change coolant cup. I was loosing coolant and no leaks. Was the cup evaporating
Have a 2017 X1 with this engine. 82K Miles and the engine itself is running fine. It's the peripherals that suck on this engine. About 60k miles, the passenger side engine mount failed. Then at 75k, fluid leaks everywhere. The oil filter housing, plastic in the cooling ports broke... replaced with all aluminum housing. Water pump/thermostat on it's own mount... same failure so replaced that. Also a plastic (get the idea) cooling port also leaking. Replaced all the cooling hoses while in there as well as the serpentine belt. Oh, and the windshield washer pump was leaking... easy replacement as long as the wheel well liner was out. At this point I hope on done on the major crap for another 75k miles. Still going to coils and plugs soon.... once the weather cools off.
I'm doing a water pump, t stat, tensioner and belt at 178k on my 15 X3. Absolutely trash it every time I drive it. I tell everyone that you have to fix your own cars if you want to afford a BMW. Had I been taking it to the dealership, they would have bent me over the barrel and gone to town 😂. I'm in Canada and we frequently get screwed on BMW OEM parts costs. It is about 40 percent more in Canada to buy the same part as it is in the US. Most of my friends and family spend next to nothing on maintenance of their vehicles. They bring their cars to me 😂. Just don't tell anyone you know how to fix cars
I just did my OFH upgrade to the Aluminum version on my B46. It had not failed, but i figured I would do the maintenance anyways along with the valve cover. I removed the valve cover and the chain has slack between the two cam sprockets. :( I'm at 108k miles and have been stage 2 tuned since 36k miles. Time to pull the engine :(
My 2014 mini cooper s was the first model to have the B48 motor. I have 218k on it an it’s been tuned for most of its life and it’s still running strong.
Commented this on another of your other videos...................I'm amazed how large they can make an I-4 engine with DOHC technology. I-4 used to be a small, compact engine............
I know someone with an n20 with around 100k, 12 years old out of an x1 automatic. The timing chain / guides was replaced under warranty before it had issues.
didn't know the crank was a four torx bolt pattern... lol alot of people complain about doing crank cub when tuning this engine and the B58. I'm gonna assume the B58 has some what of the same bolt pattern so this was very interesting. I thought the B58 sounded amazing. Now it seems like alot of work if you want to make power. (I'm drunk @3:48am)
They just keep making engines more complicated than they need to be, and having the timing system at the BACK of the engine, is a real a**hole move. Not to mention the over-use of plastic parts where they shouldn't be.
Even Caterpillar and Isuzu is doing it now on large L6 semi truck engines, not to mention using a belt drive oil pump in the engine. It's planned obsolescence.
Timing BELTS running in oil is probably the single worst trend in modern engines. Using plastic for parts that should be metal is just a tick behind. Failures from these two happen regardless of how well one maintains the vehicle. Sad.
Engines designed to eat themselves right out of warranty, so people have to buy a replacement. Makers just don't believe in quality anymore, only volume and profits.
@@billgraff4809 Well, the BMW M52 and any other Engine of that era used plastic chain guides and they rarely fail. The ones I pulled from a 2003 M57TU engine with 330k km were in pristine condition. A bit more on the brittle side than new ones, but after 20+ years of permanent heatcycles, i think thats okay. A friend of mine has currently 600k km on an unopened gasoline engines, still runs strong. Plastic guides DO work, when the chain and guides are well engineered.
x pattern is called honing. It's done in the factory so oil sticks to the cylinder wall better. If used motor still have it it's a good sign. It means it's not worn out and well maintained.
I own a ‘17 430i with a B48 installed and the cooling system has been a complete nightmare. First, the cylinder head ventilation line failed, then the turbo failed because the oil filter housing was damaged and leaking coolant, the other day a hose from the intercooler expansion tank popped out, causing my car to leak and the cooling fan to go crazy.
I know right! I was mentioning the snac paks every video cause they're sitting there ever single video, but he never responds! Eric, oh Eric, why for art tho pudding pops sitting there for eternity, week after week there they sit. On a crowded engine-filled set of shelves, sitting out of place, lost in space! 🚀🤦🏻♂️🥄🥣🤔😂
On the subject of "noooo don't tear the bottom end apart!" - I would be very keen to check and have a machine shop check and re-deck the block, which needs all the rotating assembly removing to do. The block likely isn't warped, it's usually the heads that warp unless you go HAM and run the thing forever with a blown gasket (not the case here, clearly, this one was probably shut off as soon as the coolant temp warning came on) but anywhere that hot gases have tracked over the block outside of the liners it might have scarred the surface a little, I'd have thought, as that isn't material that's designed to contain hot gases. At the very least, having the block professionally re-finished is 100% worth is on an engine that new with that kind of value.
Criss cross / or hash marks on the cyl walls are honing marks. If you can still see them, engine is good. If they are worn off, time to bore and rehone!
@@diesellady1 Just break any "glaze" in the bore to establish an OEM cross hatch surface to bed in new rings... Had that done on a 1975 Datsun 120Y (B210) after 180k kilometres (112K miles) Like new performance again..(all 69 horses back in the corral)
The oil filter housing being plastic was most certainly the cause of the failure. And for less than $100 you can get an upgraded all metal housing from multiple aftermarket sources to prevent this problem. And so could BMW for that matter. If they cared.
From all the crusties on the water pump and elsewhere it probably ran low on coolant which is what doomed it to failure. This is alluded to by Eric’s comment on the thing basically being the Sahara desert inside. While the metal housing will do a much better job of circulating the exhaust gasses that have taken the place of the coolant without melting, the outcome would have probably been the same.
I own a ‘17 430i with a B48 installed, the oil filter housing had a crack which leaked coolant for me, this caused my turbo to fail. The cooling system on my car has been a complete nightmare.
Doing a lookup in brain, cold storage section, so take it for what it’s worth. At 23mins you mention X pattern cuts in the bore. If I remember right the x pattern is part of the bore cut and is to help evenly wear and seat the rings.
Amazing, sunday morning coffee, it was actually a boring teadown, but you made it entertaining anyway. This engine looks like it should have been rebuilt with a head job in the car.
I love the new engine parts hardness tester! Also I think that the move to rear timing chains is for added revenue on the service side of the dealership to make up for slow sales maybe?
Thats where Mercedes stands out from the German big 3 , BMW's , Audi's and even Jaguar AJ series have always had cooling system and cooling system component issues. Sorry but my Mercedes 8 cylinder cars do not overheat. Not sure why BMW has dealing with these issues for soo long, is it too difficult to design an overbuilt large capacity cooling system?? Another great video!
The cross hatch pattern in the cylinders comes from the honing process. Cross hatching angles one direction when the machine goes up, and reverses direction when the machine (hone) goes down. Enjoy the vids! Success to you.
I worked on a B48 a couple weeks ago at work, lady complained of coolant leakage. Discovered it was leaking from that topmost gasket on the oil filter/cooler housing. Also the GFRP on the housing had broken in the same place too.
I kind of wonder if the 4 cyl ones having overheating isn't perhaps the owner not doing maintenance or something.. They tend to be less expensive (lots of older X2s and stuff for the low 20s for example) and perhaps the owners aren't taking it to the right places to have work done I had a 228 with this engine and man. I'm kinda shocked by how complex it is. For what it's worth it never gave me a lick of trouble in the time I had it and was extremely smooth and powerful
I don't know who BMWs material scientist is for gaskets, hoses and o-rings but he has been working for them for about 30 years now and he settled on the self disintegrating stuff in his first week and then put his feet up on the desk
I can guarantee you the oil filter housing went out. Coolant leaked for a long time. That housing cracks and leaks as early as 60k miles. Left unchecked and not replaced with an aluminum variant or new plastic oem. Can quickly lead to air in the system and causing an overheat situation.
One good thing about most modern German engines (for Eric) is they don't have dipstick tubes to fight. I have to say for 95k, this one is really clean inside so I'm guessing it got better than the usual BMW 10k change intervals.
I absolutely HATE having no engine oil dipstick on the B48 in my 2018 MINI Cooper S. 5k oil and filter changes for me, and a lot of the reasoning behind that is I can't actually look at the oil on the (non-existant) dipstick.
You know, I think I would really like to see you tear down an old flat head. I have several and am about to learn how to work on an engine with them. Would be invaluable - especially to see you try to get a distribution tube out of a 50's dodge.
I wonder if the X pattern on the bore is caused by extended oil service intervals, usually 10-11k miles for the first three years with the maintenance package that comes with new BMW’s? I suggest everyone do 5k mile oil changes for new beamers and used as well unless you don’t keep your vehicle over 100k. If everyone did that though, you would probably have less beamers in the junk yard for mechanical issues.
Calling the N20/N26 platform the worst BMW engine is a huge stretch, there are multiple people with high mileage N20's AND TUNED no issues with timing chain etc. 👽
Define lucky n20 owner... Mine is at 160000km did the chain before it broke. It doesnt use any oil, it even doesnt leak it. But i dont follow bmw guidelines, oil is refreshed every 10k.
I am a bmw tech. B48 b38 b58 are solid engine . Because people cheap out on the maintenance thats why they break . Or used aftermarket part or some shop have no idea what they doing.
Failed Oil Filter housing is not maintenance its poor design. My 2018 x3 is in the shop for this right now less than 5 years old and 65k miles.. This is a bs design with cheap parts it has nothing to do with maintenance.. How does brittle plastic on an internal oil filter housing have to do with maintenance? I agree people dont maintain BMW's get what they deserve but this has nothing to do with maintenance. Im a huge BMW fan but this is in-excusable.
The valves were open because the head still had valvetrain and cams mounted. Normally I don’t leave them complete so they’re only open when there is a problem.
Those B48 and B58 you did were only design for 2-3yrs before they redesigned for single timing chain. So the B58 is night and day different from B58TU-- head and block not interchangeable at all bc castings are different
Yah know, Eric, you do always say, "...even the criticism..." Dude, there is nothing to criticize. My wrenching days are long over, yet my Saturday evening is would not be the same without an I DO CARS fix. No dissing, only kudos. Thank you!
Ditto. Saturday night tear down has become a tradition with friends, coworkers, and myself. We enjoy what you do and thank you!
Never say never. After retiring I got tired of honey do lists and towing a trailer around the country. I bought a hobby car and have really enjoyed turning wrenches on it.
Hey so I actually service BMWs almost exclusively here in Charleston I own JU Automotive. Where you said that the oil filter housing wasn’t the cause but the affect of overheating I can almost guarantee that it is the cause of the overheat. They typically break in that spot and do cause overheating and sometimes mix oil and coolant or vise versa. Love you !
And that broken housing will dump every bit of coolant out of the engine super quick.
Speaking from experience.
Some questions for you: (1) how frequent is the injector issue where they could hit collide somehow? (2) do you think the plastics in this engine will fail like past bmws from heat cycling? (3) what are odds someone will need to get to timing components before 200k miles?
@@neilquinnI only have knowledge on diesel powered BMW engines. 1) Injectors on those are pretty sturdy, a bad injector happens pretty rarely in my experience. 2) The plastics on all the cars will eventually start to deterioate and break/crack, in my case on my F10 530d I had to change the plastic coolant tube that attaches on the left side of the head, that bastard was shooting coolant all around (everything's fixed now). 3) Timing chain should last 200k miles or a little more, but you'd have to consider changing it earlier than that, I myself have 245k km / 150k miles on the odometer, haven't yet changed the chain, timing system looks to be healthy. Regular oil changes help reduce the risk of timimg related issues - I change oil every 10-12k km (6-8k miles)
do you know if they make aftermarket metal alternatives?
*effect, not affect. 😉
Automotive Engineer for Honda here. Those BMW motors are pretty solid. Toyota uses them in the base Supra. The rod bearings looking like new at 100,000 miles kind of proves that. BMW makes some great engines. It's the emissions regulators and accounting teams that force us to use plastic cooling systems. It's not just BMW. If you don't replace the cooling system at 100,000 for any car past 2008, you're on borrowed time.
I agree that the metal machined parts of this B48 engine look rugged and extremely well made and machined. Lots of savings could be made by making things less well and still last well enough. But no, some dinglebunny accountant comes along, you claim, and tells the engineers "Ve must sev 5 cents by using a plastic water pump impeller". Right, that and three bucks will get me a cup of what passes for coffee these days. Makes no sense no matter how one looks at it. Emissions? A water pump impeller made of plastic that lasts forever in a dump, if not in the engine. A metal one is easily recyclable.
I look at that "oil cooler" and see O-rings tortured into crazy shapes on the block used as oil "seals". Suddenly, German rationality is ditched.
Look at Honda screwing the J35 with DI, using $3 injectors that fail at 50K miles, as South Main Auto has shown. Honda sells a cheapo six pack even at its dealers for this "wear" item. Plus who knows how much labor to replace them, when it's only a 30 minute job, according to happy mechanics reporting in at beating the book rate by a country mile. Hell, the timing belt lasts twice as long.
I've seen accountants at work, and they generally come round to reason, and blaming "emissions" for use of plastic parts is pure hogwash -- nothing, I mean NOTHING, to do with it. Discarded plastic in landfills lasts for ever,; scrap metal is easily recycled. You're not getting your excuses past me, I'm an engineer too.
I mean, even the most cost-cut engine I've seen here, the Hyundai 1.6 turbo, made out of spider webs and 1 mm thick alloy lasts 100K miles.
So these robust BMW engines have to have built-in failure points -- on purpose. Same with everyone else. Otherwise we have to assume engineers are all Jekyll and Hydes, which is absurd. Like running rubber toothed belts in oil at Ford and VW, and those useless DI injectors at Honda. Or VW using expensive special iron on their otherwise dog's breakfast of a 2.0 liter turbo four. That's the stupidest mechanical design I've seen torn down on this channel -- a complete nightmare.
Much as I hate to agree with Internet opiners, I see a conspiracy to produce junk. 95% good, and then crap that will obviously fail. Not the way my mechanical engineering career went, but it wasn't in automotive which seems like scam city.
Toyota/Lexus UR, GR series entered the chat. Not trying at argue with an engineer but this is to prove your point that some companies accounting teams are interested in using higher quality rubber hoses and not using plastic water pumps, like Toyota, Honda, Mazda and Subaru. Maybe even Mitsubishi although it is a dying breed.
@@Methylphenidate2803 Oh how naive you are. Toyota/Mazda/Subaru are all using the same cheap processes. It's called injection 3D molding. No company is using plastic water pumps as of 2009 either. What they tried is using plastic impellers for a while. "Higher quality rubber" is so painfully incorrect. All manufacturers such as BMW, Toyota, and whoever use the same quality rubber". Generally, quality companies like Continental will make the hoses. The big differentiator is that a performance car tends to run at higher temperatures naturally. Your average Toyota is tuned to underperform generally compared to something like a Camaro SS. Thus, it will make that rubber last a bit longer. Finally... You should really be replacing these "high quality rubber" parts every 8-10 years on any car. Not doing so means you aren't too knowledgeable on how a car works and are on borrowed time. Gaskets/hoses/etc. degrade with heat and lose mass. It wasn't until the last 5-7 years that new materials were compounded to better tackle this issue, but those are all aftermarket.
This is one of those moments where it's better to remain silent than to speak and assure someone you are not informed.
@@BillMalcolm-tn3kq You're not wrong. ALL companies are 100% taking shortcuts. I blame it on regulations and greed mainly. The US wants 70& of a car to be able to rot into the earth environmentally after its use. What does this mean? It means corn-based plastics and shortcuts just to be able to produce a car.
Ahhhh no
I love that you don't have a long tedious intro and music. Other channels could learn from you.
But there is the lame attempt at humor.......
What's a long tedious intro to you?
@@MontanaDirtRoads” start your engines…” with a car revving
@@Savvynomad225 agreed,my "intro" is just clips of old past videos lol
Yeah but he spent two minutes complaining about BMW engines and BMW aesthetics when this is supposed to be a B48 teardown video
I love how I can just come sit down with my Sunday morning coffee for video upload that's just NICE. No shouting, no drama (except throwing shade at manufacturers), just some relaxing wrenching
I agree. That’s why I’m here….
Back in the early 2000s when I was into e30s every used one I would get, I learned the first thing you did was replace the entire cooling system!
So true! My ‘02 330ci got the whole cooling system replaced every 60k miles.
Yes sir, and then most of the electrical system and then about every gasket on the engine. JUNK
That's my experience with E30s too. But then that's almost the case with old cars I've had. I've replaced radiators, water pumps, thermostat, cooling and heater core hoses on my 30 year old Celica too. However I can say the Toyota will run without issues despite having coolant leaks compared to the E30 325i I used to drive.
@@ricksays7133 God bless Toyota engineers.
Is it expensive to change the cooling system? Parts and labour?
Also, how frequently would you suggest doing it?
I barely drive 5k miles per year and based in the UK.
I’m considering buying a 2019 F30 320i with the B48 engine , and with less than 50K miles on the clock, and just trying to learn as much as I can so I can keep on top of things.
Thanks ✌🏼
Dude! My wife loves to listen to you in the background and watches all you're tensioner and water pump shenanigans. Today she has suggested that you need a clear safety tote (she even gave it a Rev 3 designation!) for your convenience.
She actually has learned a ton about engines and to my surprise has even spoke about engine topics while we're driving down the freeway!
Keep up the great work!
I’ve had 5 BMWs from a 1996 535i and to the 2015 X5 with the 6 I’m driving today. I’ve only had one give me trouble on the road. A 2000 323i that gave up its alternator at 235,000 miles. I think it’s to be forgiven. It sounds like some of you guys have had bad experiences but I really haven’t.
Give me my 2004 Lincoln Town Car 4.6L 2 Valve. Three or Four years ago I had the mandatory heater hose nipple break off on the interstate. I lost all coolant. I only noticed when power reduced as it went into the "Air Cooled" mode running on 4 cylinders and 4 pumping air. Got it off the road safely with reduced power. I had the intake and hoses replaced, refilled coolant and that is it. Total repair was $600 done by a professional mechanic. it is now 20 years old and 225,000 miles. No check engine lights. Drives and looks new, only the drivers seat gives its age away. Ill change that soon enough.
Don't get me started on how great the Lincoln Town car is for people that don't want to spend a lot of repairs.
My best friends had 6 TCs between them. Yes, they had some bad ones but only because they absolutely abused them. The 4.6 is absolutely solid
Hot fire awaits engineers who put the timing system on the back of engines.
Instead of fixing their cooling systems they decided to over-engineer the timing system.
My 2006 Explorer has the best of both worlds - a crank-driven jack shaft and camshafts driven off the jack shaft with chains front AND rear.
This is what would make me the most nervous about buying any vehicle with these engines. Timing guides failed on these in the past. I can't imagine the cost of a full engine out repair.
Imagine what awaits those who put water pumps behind the timing chain system 🔥
All of the "technology" already exists. Cam in valve cover. Fuel pump in valve cover. Rear timing. Water pump behind timing cover. Wet timing belt. Boom, you're pulling the engine every 60k. Awwyeah. Ford will probably do it first, if their recent abominations are any indication.
I saw a drift race engine builder use the side of the engine to mount it to the engine stand. Used an adapter plate like you would for the rear but setup to use the motor mount instead
Nevermind 🤣
That was a common practice with old, iron block BMWs. We used the oil filter mounting bolt holes.
I like your balanced, factual, philosophical, non judgemental theories and conclusions when summarising the probable reason for the overall engine failure. I'd say manufacturers could learn a lot from your teardowns, it's often hard to predict what will fail when designing an engine and easy to apportion blame after the event. That said, the use of plastics, for whatever the reason, appear to be the weak link most of the time. At least this engine appears to be much improved, when compared to previous versions.
Stumbled across this video today researching a used X3, which also uses the B48. This is really nice work... staight forward, detailed, factual, no drama, no forced humor. Keep it up!
As always Eric, thanks for the Saturday night entertainment. Happy Memorial Day everyone, and thank you to those who paid the ultimate price for our freedom.
Amen.
Yes sir our service men & women are the best, we owe them for our freedoms
An engine condemned for a blown head gasket. In my day (60's and 70s) that would have been $100 to $200 to R & R the heads plus $80 to rework the heads. (New valves and springs and milling the head level. The only way we would throw the engine away would be if the block itself was warped, extremely rare.
Rainman Ray had a Ford engine he wrote off as he said just replacing the gasket was 14 hours, never mind doing anything with the head....
Thanks Boomer
You are welcome.@@hijinks21
The problem is that these small displacement turbo engines have a very high specific power output so there is LOTS of pressure and heat involved. When a head gasket fails it’s usually pretty cataclysmic. I lifted a head on a late-model small turbo motor from preignition and it ended up spraying coolant right out of the side of the engine. The scary part was that once things returned to normal the bolts still had enough tension to allow the steel shim gasket to seal and it even passed a compression and leak-down test. But, the reduced bolt tension allowed trace amounts of coolant and exhaust to seep by, which eventually would end up trashing the engine due to coolant contamination and rust. If you catch it right away it’s fixable, but by the time it gets to this point, it’s cooked.
sure, they were ruggedly simple...and that's about it. Not necessarily powerful unless you had a swimming pool worth of displacement, drank through tanks like no ones business, and many still weren't even all that reliable. Many vehicles past the 90s, specially many Japanese ones, will gladly eat up miles upon miles. Hell, even my old BMW got beaten on daily and had over 160,000 miles on it. Engine purred like a kitten and pulled smoothly. This all comes at a cost. You can't just fix modern cars in your backyard like you could back in the day.
I really want to thank you for your videos. It's very relaxing to watch your videos at the end of a hard day of work. Again, thank you so much. God bless you and your family
One of my "go to's" when chillin in the office. Always the best .
I would love to see you tear down a 2.4 SRT4 that came in the 2003 Chrysler PT Cruiser GT with the aluminum intake. If you can get your hands on one. Great video as usual.
those had cylinder cracking issues if im not mistaken
My n20 328 i 2013 just past 100000 miles, zero problem, still original all parts of engine. Only replace front shocks. F30 excellent car, super reliable engine…
Love this channel, love Erics' humor, love seeing crappy engines being torn down.
It's a win all round, wouldn't you say?
His good deed for the day is completed, there's now one less intact 4 banger BMW engine in existence
"...but you guys know i'm not a normal person." - haha, you are the best
My 2009 N51 is doing great at 146k. No turbos, no DI with HPFP, cooling system serviced and no leaks. Just a solid daily driver. Knock on wood.
The turbo heat cycles on that engine warped the engine block, it's common on all turbo applications where the turbo is directly mounted to the center of the exhaust manifold.
Sunday mornings with coffee and engine tear downs, so relaxing.
Who wife’s think they’re crazy too.😁
The X patterns on the cylinder walls is a crosshatch pattern to retain oil,very important!
As the former owner of a Mini Cooper S with a B48 engine, I’ve been waiting for this moment!
The perfect video to watch at 2am. 🔥🔥
Looking at the the build quality being much better than that Subaru engine you recently tore down is interesting. Unfortunate that BMW uses cheap plastic for their cooling system.
I was once told that European cars used “bio degradable” plastic engine parts vs “recyclable” plastic parts on other brands. Might be true: on my M54 Bimmer you WILL replace the coolant expansion tank every 60k. Or else…..
Meanwhile my ‘11 F150 Ecoboost went 160k on the original “de-gas bottle”, it being strong as day one when I traded it.
Another great episode, Eric, thanks so much !!! As an old fart (real old) I'm amazed at the complexity of today's modern engines. And to me, so much unneeded complexity, and all for what? Increased power, fuel economy, etc??? I'm just stuck in the past, I guess, and reminiscent of the multitude of American small block V8's (trouble-free) I owned and drove the bejesus out of, from shore to shore.
4:05 - Stephan Papadakis did a whole build series on his B58-powered drift car quite a while back, and he welded up a bracket for side-mounting the engine on his stand. It seems like the only safe way to do it while retaining access to the timing chain components.
We sell these quite well. The fwd engines are more expensive than the rwd versions. The problems i usually find are blown head gaskets and cracked pistons. If there is a loss of compression in one ir the cylinders then you have a crack in the piston between the rings.
As a owner of a 25 X3 with a b48 I feel confident with proper maintenance this engine will be very reliable. BMW has also made additional improvements for the 48 and 58 this year.
Thanks!
Thank you!
16:37 😂
Be careful. Last time I did that, my wife got knocked up! 😂😂
Are you going to burst through the screen? Bust a nut?
I have a BMW 328i with N20 engine. had it since 2014. Oil changes done every 5k miles. 55k total miles so far. No problems so far!
N20 timing chain issue fix after 2015 Jan
55k is like new
N20 has nothing in common with a b48. I don’t think they share a single part.
ive had 2 minis, a b38 and a b48, both had the oil cooler changed at around 62k km(38.5 k miles) otherwise all good with both of them
Brutal that's hardly any mileage. I'm considering the new JCW and somewhat hesitant.
You are quite the business man. I'm glad you're doing well. Unlike that Hot Head BMW.
This is the exact same type of engine in my 2018 X1. It currenly has 48k miles. It's been very good to me thus far.
Good to see the condition of the internals on this B48, as I have one in my 2018 MINI Cooper S. Well, actually mine is a B46, but they should be the same, right? At 50k miles now, no issues whatsoever, and it doesn't seem to burn hardly any oil, maybe 1/2 quart of RedLine 5W30 Euro TD oil between my 5k oil/filter changes. I just switched over to Mobil 1 5W30, so we'll see if that continues. The B48 timing chain location definitely had me a bit frightened, as the timing components on my 2011 N18 MINI Cooper S were supposed to be rather weak, although mine seems to be fine at 127k miles now. I did have a head gasket failure on my N18 at like 88k miles, combustion gases into cooling system (much like the failure on this B48 you tore down), but that was on me due to not correctly bleeding the cooling system after a coolant change. I couldn't find a local place to resurface that head, so I bought a good used 38k mile head from a Euro auto salvage joint, all new BMW gaskets and such (no timing components except the upper chain guide and the TTY bolts that needed replacing on the cam gears etc.) and all has been good since then. Thanks, Eric, for the great tear-down videos! Keep them coming, man! Take care, and stay cool.
I have a B46c in a ‘20 Mini Countryman. It only has 30k miles and we barely drive it so I pray it doesn’t cause me heart ache anytime soon. So far so good with it though. Also have the ‘20 S58 X4M with 23k miles. No issues there either. I just keep the oil changed 🤷🏽♂️
As I used to own a 2018 X2, I found this teardown interesting. It's too bad it's not possible to tell why it overheated with certainty, the leaking water pump is high up on my list of suspects. I think you''re right that the owner didn't run it completely to death, but the check engine light must have been on for a while given how hot it got. It looks like the engine can be rebuilt with the block being decked and perhaps also the head. Not sure why you're surprised that it has balance shafts. I4 engines all have secondary imbalance and I would be surprised if anyone makes an I4 without balance shafts. The x-pattern on the bores is called crosshatch, but surely you know that. Were you looking at something else? It was thoughtful of you to let the water pump spend a few minutes in the passenger seat of your M3 before it goes to the crusher.
Another commenter who works with these engines stated that the burnt through plastic water to oil cooler housing DOES melt and dumps the coolant in seconds...right where that hole was on the one Eric took off!
Time for an aftermarket ali housing to be manufactured???
I LOL'd at the wrapped water pump buckled into the passenger seat! This guy is funny!
i have a 2018 330 with a b48, very cool to see the internals. i think its a generally pretty well built engine, due in part to input from toyota as you can get this engine in the supra. forged crank and connecting rods and arc/lds coated cylinders. there are folks pushing 500hp reliably with the some of the later gens.the cooling system can be problematic, specifically the line to the expansion tank which had a recall.
I think thats the case with this engine here on video they tunned Pressure got to high for gasses to leak. I have same engine and is solid. Only when engine is cold little rattling from waste gate, + i had to change coolant cup. I was loosing coolant and no leaks. Was the cup evaporating
Problem is the coolant line recall was only limited to a couple of countries, even though it affects all B48's of a certain vintage
Have a 2017 X1 with this engine. 82K Miles and the engine itself is running fine. It's the peripherals that suck on this engine. About 60k miles, the passenger side engine mount failed. Then at 75k, fluid leaks everywhere. The oil filter housing, plastic in the cooling ports broke... replaced with all aluminum housing. Water pump/thermostat on it's own mount... same failure so replaced that. Also a plastic (get the idea) cooling port also leaking. Replaced all the cooling hoses while in there as well as the serpentine belt. Oh, and the windshield washer pump was leaking... easy replacement as long as the wheel well liner was out. At this point I hope on done on the major crap for another 75k miles. Still going to coils and plugs soon.... once the weather cools off.
I'm doing a water pump, t stat, tensioner and belt at 178k on my 15 X3. Absolutely trash it every time I drive it. I tell everyone that you have to fix your own cars if you want to afford a BMW. Had I been taking it to the dealership, they would have bent me over the barrel and gone to town 😂.
I'm in Canada and we frequently get screwed on BMW OEM parts costs. It is about 40 percent more in Canada to buy the same part as it is in the US.
Most of my friends and family spend next to nothing on maintenance of their vehicles. They bring their cars to me 😂.
Just don't tell anyone you know how to fix cars
I just did my OFH upgrade to the Aluminum version on my B46. It had not failed, but i figured I would do the maintenance anyways along with the valve cover. I removed the valve cover and the chain has slack between the two cam sprockets. :( I'm at 108k miles and have been stage 2 tuned since 36k miles. Time to pull the engine :(
My 2014 mini cooper s was the first model to have the B48 motor. I have 218k on it an it’s been tuned for most of its life and it’s still running strong.
How many miles today? I just brought one
@ 218k and still climbing. They are very reliable. Just I recommend oil changes every 5k instead of the 10 it recommends in your manual.
Commented this on another of your other videos...................I'm amazed how large they can make an I-4 engine with DOHC technology. I-4 used to be a small, compact engine............
Yep, we had a 2011 BMW X3 and we started leaking cooling from the expansion tank at about 55000 miles. Replaced the tank - then sold the car.
Cool story bro 😂.
117th! Eric, how’s the engine that you were going to send to Ray in Florida for the van repair going? Roger in Pierre South Dakota
The early B48 had a defective coolant return line. It would empty pretty quick. It killed some engines.
I know someone with an n20 with around 100k, 12 years old out of an x1 automatic. The timing chain / guides was replaced under warranty before it had issues.
didn't know the crank was a four torx bolt pattern... lol alot of people complain about doing crank cub when tuning this engine and the B58. I'm gonna assume the B58 has some what of the same bolt pattern so this was very interesting. I thought the B58 sounded amazing. Now it seems like alot of work if you want to make power. (I'm drunk @3:48am)
They just keep making engines more complicated than they need to be, and having the timing system at the BACK of the engine, is a real a**hole move. Not to mention the over-use of plastic parts where they shouldn't be.
The Germans seem to like to do this and I hope the engineers that thought this was a good idea have nightmares for the rest of their natural lives
Even Caterpillar and Isuzu is doing it now on large L6 semi truck engines, not to mention using a belt drive oil pump in the engine. It's planned obsolescence.
Timing BELTS running in oil is probably the single worst trend in modern engines. Using plastic for parts that should be metal is just a tick behind. Failures from these two happen regardless of how well one maintains the vehicle. Sad.
Engines designed to eat themselves right out of warranty, so people have to buy a replacement. Makers just don't believe in quality anymore, only volume and profits.
@@billgraff4809 Well, the BMW M52 and any other Engine of that era used plastic chain guides and they rarely fail. The ones I pulled from a 2003 M57TU engine with 330k km were in pristine condition. A bit more on the brittle side than new ones, but after 20+ years of permanent heatcycles, i think thats okay. A friend of mine has currently 600k km on an unopened gasoline engines, still runs strong.
Plastic guides DO work, when the chain and guides are well engineered.
x pattern is called honing. It's done in the factory so oil sticks to the cylinder wall better. If used motor still have it it's a good sign. It means it's not worn out and well maintained.
I own a ‘17 430i with a B48 installed and the cooling system has been a complete nightmare. First, the cylinder head ventilation line failed, then the turbo failed because the oil filter housing was damaged and leaking coolant, the other day a hose from the intercooler expansion tank popped out, causing my car to leak and the cooling fan to go crazy.
pretty sus that we've never seen you eat a Snack Pack...
I know right! I was mentioning the snac paks every video cause they're sitting there ever single video, but he never responds!
Eric, oh Eric, why for art tho pudding pops sitting there for eternity, week after week there they sit. On a crowded engine-filled set of shelves, sitting out of place, lost in space! 🚀🤦🏻♂️🥄🥣🤔😂
It’s the Billy Madison Easter egg since he’s a Sandler look a like😂
I bet if he eats one, he'll get flashbacks of that one Mercedes engine lol
@@Rob_S_Z06 guess he filled up on bananas... still sus
On the subject of "noooo don't tear the bottom end apart!" - I would be very keen to check and have a machine shop check and re-deck the block, which needs all the rotating assembly removing to do. The block likely isn't warped, it's usually the heads that warp unless you go HAM and run the thing forever with a blown gasket (not the case here, clearly, this one was probably shut off as soon as the coolant temp warning came on) but anywhere that hot gases have tracked over the block outside of the liners it might have scarred the surface a little, I'd have thought, as that isn't material that's designed to contain hot gases. At the very least, having the block professionally re-finished is 100% worth is on an engine that new with that kind of value.
Criss cross / or hash marks on the cyl walls are honing marks. If you can still see them, engine is good. If they are worn off, time to bore and rehone!
Re hone!
@@diesellady1
Just break any "glaze" in the bore to establish an OEM cross hatch surface to bed in new rings...
Had that done on a 1975 Datsun 120Y (B210) after 180k kilometres (112K miles)
Like new performance again..(all 69 horses back in the corral)
X pattern crosshatch from final machining of the bore.champion plugs suck,you all know it.
The oil filter housing being plastic was most certainly the cause of the failure. And for less than $100 you can get an upgraded all metal housing from multiple aftermarket sources to prevent this problem. And so could BMW for that matter. If they cared.
lot's of plastic on that motor - inexcusable for motor of that money - but that's what its come to
From all the crusties on the water pump and elsewhere it probably ran low on coolant which is what doomed it to failure. This is alluded to by Eric’s comment on the thing basically being the Sahara desert inside. While the metal housing will do a much better job of circulating the exhaust gasses that have taken the place of the coolant without melting, the outcome would have probably been the same.
@@hordesoflocustevery new engine is like this if not worse.
A lot of vehicles have that plastic oil filter housing..nothing wrong with it...just change it every 5k miles and don't overtorqure it
I own a ‘17 430i with a B48 installed, the oil filter housing had a crack which leaked coolant for me, this caused my turbo to fail. The cooling system on my car has been a complete nightmare.
Doing a lookup in brain, cold storage section, so take it for what it’s worth. At 23mins you mention X pattern cuts in the bore. If I remember right the x pattern is part of the bore cut and is to help evenly wear and seat the rings.
The wastegate rattle is still a thing on the new b series engine. But there's a "fix" for it but they still make noise after the noise
Have a 2018 BMW N20. It's been really good to me just an oil return line.
I would love to see you get some sport bike engines in like a yahama r1 or a zx10r
All these choices are great but what about a oldie but goodie Ford 4.6l 2V , never seen them on the channel.
Amazing, sunday morning coffee, it was actually a boring teadown, but you made it entertaining anyway. This engine looks like it should have been rebuilt with a head job in the car.
Nice video. I rebuild that engine but awd and is the first and last we rebuild.
I love the new engine parts hardness tester! Also I think that the move to rear timing chains is for added revenue on the service side of the dealership to make up for slow sales maybe?
Compare to C&C equipment channel where apparently somebody dumped gravel into a dozer engine!!!
Real gravel
Thats where Mercedes stands out from the German big 3 , BMW's , Audi's and even Jaguar AJ series have always had cooling system and cooling system component issues. Sorry but my Mercedes 8 cylinder cars do not overheat. Not sure why BMW has dealing with these issues for soo long, is it too difficult to design an overbuilt large capacity cooling system?? Another great video!
The cross hatch pattern in the cylinders comes from the honing process. Cross hatching angles one direction when the machine goes up, and reverses direction when the machine (hone) goes down. Enjoy the vids! Success to you.
I guess it is a bright spot that oil filter housing are made out of plastic these days? At least the engine gets shut down when it melts?
The old engines from the 70,s and the 80,s were so much easier to work on and longer lasting then to days
Because now German cars want to be the most technologically advanced cars on the road
Yes 70 engine with 100 HP and iron block. Feds want an ave of 27 MPG now and you want 0-60 in 5 sec.
Can anyone tells me the cost of preventively fixing those leaks? Thank you! It really got me nervous😢
I worked on a B48 a couple weeks ago at work, lady complained of coolant leakage. Discovered it was leaking from that topmost gasket on the oil filter/cooler housing. Also the GFRP on the housing had broken in the same place too.
seems like this is a very common issue that warrants a BMW factory recall as it is a plastic consumable part.
"Take the extension out"!
would be great on T-shirts as s motivational phrase.
If you make a millions on it maybe I can get $50K.
Is a surprising amount of engines which side mount. My VR6 has to mount on side of the engine for the stand.
I kind of wonder if the 4 cyl ones having overheating isn't perhaps the owner not doing maintenance or something.. They tend to be less expensive (lots of older X2s and stuff for the low 20s for example) and perhaps the owners aren't taking it to the right places to have work done
I had a 228 with this engine and man. I'm kinda shocked by how complex it is. For what it's worth it never gave me a lick of trouble in the time I had it and was extremely smooth and powerful
Need a way to mount engines to the stand at the motor mount pads on the side of the block. Cummins guys do it. Seen it with b58 recently.
I don't know who BMWs material scientist is for gaskets, hoses and o-rings but he has been working for them for about 30 years now and he settled on the self disintegrating stuff in his first week and then put his feet up on the desk
I can guarantee you the oil filter housing went out. Coolant leaked for a long time. That housing cracks and leaks as early as 60k miles. Left unchecked and not replaced with an aluminum variant or new plastic oem. Can quickly lead to air in the system and causing an overheat situation.
One good thing about most modern German engines (for Eric) is they don't have dipstick tubes to fight.
I have to say for 95k, this one is really clean inside so I'm guessing it got better than the usual BMW 10k change intervals.
I absolutely HATE having no engine oil dipstick on the B48 in my 2018 MINI Cooper S. 5k oil and filter changes for me, and a lot of the reasoning behind that is I can't actually look at the oil on the (non-existant) dipstick.
Take an look i the intake port at cylinder 1 or 2 i think i saw an crack in the bridge between the runners
Those cracks are normal and no concern...
You know, I think I would really like to see you tear down an old flat head. I have several and am about to learn how to work on an engine with them. Would be invaluable - especially to see you try to get a distribution tube out of a 50's dodge.
I wonder if the X pattern on the bore is caused by extended oil service intervals, usually 10-11k miles for the first three years with the maintenance package that comes with new BMW’s? I suggest everyone do 5k mile oil changes for new beamers and used as well unless you don’t keep your vehicle over 100k. If everyone did that though, you would probably have less beamers in the junk yard for mechanical issues.
Calling the N20/N26 platform the worst BMW engine is a huge stretch, there are multiple people with high mileage N20's AND TUNED no issues with timing chain etc. 👽
It's fine. It'll be fine....
Great Video!
Oil coolers/filter housing goes bad all the time, they cause a lot of failure across the car. B48, B58
When you pulled those pistons out didn't you start at the back ?
Define lucky n20 owner... Mine is at 160000km did the chain before it broke. It doesnt use any oil, it even doesnt leak it. But i dont follow bmw guidelines, oil is refreshed every 10k.
Thank you Eric Saturday would not be the same with out your video. I am long past holding a wrench but injoy the teardowns.
Question is why it owerheating?
Head seal blow up or?
Very interesting and visual display of a cooling system failure and subsequent damage. (why have weird cam gear bolts) Love your videos
I am a bmw tech. B48 b38 b58 are solid engine . Because people cheap out on the maintenance thats why they break . Or used aftermarket part or some shop have no idea what they doing.
Replacing cooling parts is NOT maintenance Gomer----it is called REPAIRS
Failed Oil Filter housing is not maintenance its poor design. My 2018 x3 is in the shop for this right now less than 5 years old and 65k miles.. This is a bs design with cheap parts it has nothing to do with maintenance.. How does brittle plastic on an internal oil filter housing have to do with maintenance? I agree people dont maintain BMW's get what they deserve but this has nothing to do with maintenance. Im a huge BMW fan but this is in-excusable.
Any chance you could tear down a ZF 8 speed transmission?
I need to replace my oil filter mount gasket. Why can't they just mount directly?
22:09 why didn't you state the valves are bad? stuck open from the shadow
The valves were open because the head still had valvetrain and cams mounted. Normally I don’t leave them complete so they’re only open when there is a problem.
The chain almost got you. Heating maybe a bigger radiator . or some of that stuff from redline water wet stuff.
Are the rainbows on the crank journal a result of heat treatment? Must be, the bearings look great (unless they have been replaced)
Cylinder walls are Electric arc wire sprayed which is what leaves the pattern.
Those B48 and B58 you did were only design for 2-3yrs before they redesigned for single timing chain. So the B58 is night and day different from B58TU-- head and block not interchangeable at all bc castings are different