FIXED - BMW N54 Smoking Issue (idle and deceleration)
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- Опубліковано 23 сер 2024
- In today's video we go over the complex and convoluted PCV system on a BMW N54 engine, these tips will help alleviate most smoking issues you may encounter.
Here are a few links I've read through that may be of interest:
PCV (Positive Crankcase Ventilation) - www.e90post.co...
External PCV Oil Catch Can - www.e90post.co...
DIY Custom OCC with AD Engineering Fittings - www.e90post.co...
Smoking Issue? Diy Pcv Fix! - www.e90post.co...
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Update for everyone on my personal project. Just completed this upgrade on my 07 335i that had an upgraded PCV/CCV delete system that was smoke at idle and decel after hard pull. I know have no smoking issues! After talking to Tony the only change I made was to a screw in version of the PCV valve from RAV4, 4 Runner, etc. because of availability.
Thank you Tony. Great video that actually works!!!
glad to hear it helped!!
Just change to upgraded pcv and do the rocker cover gasket and it fixes problem, I have had my 07 335i since 2006 and I have run 17Ts for the last 4 years and no problems at all.
Wow man share ur knowledge w us
Does anyone sell this as a kit? I don’t have the necessary tools to do this, but I have a bad smoking issue on my 335is
RB does have a very nice kit!
yes i had the same problem tony showed me what to do now everything is ok thanks tony💪💪
nice video, thanks
huh, i'll have to pass this video along to my bmw friends! 👍
Hi Tony,
Great video.
Ive had an n54 nearly 15 years.
Just recently the car seems to be smoking at around 1500rpm.
Car is FBO with 19T turbos. Car never used to smoke but cheap 19t turbos were put on when the VTT GC turbos blew up.
There are times im getting big puffs of smoke which is embarrassing in traffic. Car is cat free. Have done the valve cover and put in another rb pcv valve as previous one was 7 years old.
Like another commenter said, going up a steep hill seems to cause alot of smoke.
If it was turbo seals would it smoke all the time?
The car doesnt smoke often but when it does its a big cloud of smoke. So trying to figure out the best solution.
Wondering how to know if its valve seals?
Got the burger catch can but make need to do the mods you listed in this video.
is it smoking if you hold the RPM or just does it constantly?
mine would do the same when my low side catch can was getting full, pouring some caught oil into somewhere not meant to be, or keeping it from venting properly.
My old e90 had sweaty valve stem seals, only way to confirm is looking in the ports with turbos off.
you could convert your internal low side PCV system into an external, it helped mine a ton. only had some smoke on decel.
definitely go over your current PCV setup first!
hope this helps.
@tony.nextlevelrides
Thanks Tony.
I've replaced the pcv valve with another new rb valve and checked the flapper is OK.
The car only smokes when oil is up to temp. I can make some smoke when holding the revs around 1500 to 1800 rpm which is unfortunately the speed alot of the time when driving in towns.
On highways there is no smoke. Before the oil warms up there's no smoke either.
I'm leaning towards oil seals not being great but the fact it happens at specific rpms does make me think its pcv related.
@tony.nextlevelrides I'm wondering now if the crankcase vacuum is quite low at idle and causing drain issues.
Could not find the ade pcv delete piece so I've ordered the VTT one. Also the VTT billet check valve. Does that mean I don't need the 2jz pcv valve?
I will get myself a catch can and T into the evap line on the throttle body. Hopefully that improves the low side pcv and stops most of the smoke.
it sounds like it smokes similar to how mine did. I'd try and revamp the low side setup.
I used the ADE to block off the factory PCV valve and cap, using an external PCV valve. I'm not familiar with the VTT one but if it has an external setup with PCV valve, it should be sufficient.
@tony.nextlevelrides
Well this is interesting. I bought a manometer and oil cap. Drilled the oil cap and fit a nozzle to it.
The engine warmed up is reading zero vacuum. The gauge is definitely working.
It definitely feels like there's less vacuum than there was previously. So I'm guessing I had a vacuum leak and it's got worse.
I will recheck the pcv flapper and pcv valve I just added. I'm probably going to have to do the valve cover and gasket again.
Can a smoke test pinpoint where the leak is?
Thanks
Hey bud, i’m running into smoking issues with my st n54. Running plugged head ports, a BMS high side catch can, BMS low side catch can kit (which deletes the pcv valve im pretty sure), also a brand new turbo too. I’ve been told i need to run a 2jz pcv but unsure how to do that with my low side catch can setup?
I'd recommend the RB low side PCV kit that integrates the supra PCV valve. without a valve, you're causing excessive crank case pressure causing smoking. you need a PCV valve to restrict flow and ensure its routed back into throttle body line post one-way valve
Great detailed video. Have a interesting smoking issue and wanted to ask. Car usually smokes going up the hill, or highway when ful leaves AC el pedal. And at times hear pop in exhaust. Full bolt ons. Thanks.
hard to say what the might be. there's a lot of load on the engine when going up hill with lots of throttle.
I'd stay with be basics. plugs, coils and see if that helps. you could monitor it and do a data log as well to see what's going on and in which bank.
Thanks Tony Coils and plugs (n20) gapped are new. have MHD to do a log. Also no codes at all. Franken turbos new, Valve cover, Upgraded FP as well.
hmm. I'd start with a log and go from there. depending who tuned it, could be a hiccup on higher load.
Thanks. That was a thought as well, re flashed to map 0 and results are similar. Will do a log and try to interpret it.
good luck, depending on model, the Facebook groups can be pretty helpful.
I'd post a log and explain your situation in the "MHD tuning enthusiasts" group.
2011 e90 328i xdrive. Replaced valve cover gasket, oil filter housing, coils, spark plugs. All issues revolving around the above listed things have been fixed. The only issue now that bothers me is the white smoke from the exhaust.
Car only has 150kms and is in amazing condition.
Smokes on idle at red lights, enough to grab EVERYONES ATTENTION, and also smokes when acceleratinggg ENOUGH for all drivers behind me to stop driving and pull over because they can’t see!!!
I’d appreciate any advice please and thank you.
This is the n52 btw.
hmm, it's possible you have a vacuum leak or some sort or a cracked valve cover. I would recommend smoke testing through the intake. that'll give you a good idea as to what's going on!
Did you fix it?
if you have a catch can that vents to atmosphere would that remove the need for the china valve on the high side of the pcv system
correct, you would just simply vent both ports to a catch can and to atmosphere. I cannot recommend this though, with stock turbos it will almost always smoke, with a single it may be different but the RB PCV delete fitting is exactly what everyone should use.
When replacing high side flapper with a true check valve, what prevents excessive crankcase vacuum? (I already have the 2jz pcv valve + catch can on low side)
there's a one way check valve in the evap line to throttle body.
I have a question I was at a red light and floored it Ang suddenly heard a loud pop and saw a lot of some coming out the exhaust and seem to have lost power felt like 3 cylinders where only running I pulled over to the red after I turned off car and i turned it back on felt normally and ran great after I was driving again I slowed drop to a red light and saw white thin smoke come out the exhaust do you know the issue?
hard to say without seeing the vehicle, it sounds like you might have a vacuum leak or something from the PCV side has let go. Check your charge pipe if it's plastic, they crack easily.
Okay so I do have a question in what’s best to run with a single turbo n54 with upgraded valve cover and plugged head ports
I'd run the RB external pcc valve to a mishimoto style catch can that routes back into the evap line at throttle body.
@@tony.nextlevelrides do you have insta i need little more insight
My n54 starting smoking blueish through my exhaust and front engine when i come to a stop at a stop light and when my car starts to warm up… its FBO and has no oil leaks , can this be my turbo seals going bad? Im planning on upgrading turbos either way
yup, sounds like either PCV system or turbos.
Im using similar setup with rb kit and dont have issues. My high side barely gets any oil even after track days.
At this point im thinking about deleting the high side catch can as well. Less clutter in the engine bay.
I have also seen people running both pcv lines from the oem valve cover to a vibrant vta style catch can with no issues. Looks cleaner that way but im not sure if it will cause smoking issues. Any information on that?
I've been deleting the high-side cans on a couple cars now, only adding it to the low side.
Anytime I've seen both lines run to the same can, that's not separate, has always had issues with smoking. I don't recommend it. just put one to the low side with an inline PCV valve and call it done.
Hi Tony, Billy from South Africa. My BMW x3 e83 n52 has a smoking issue and is burning oil on No 1 cylinder, I suspect it is the valve stem seals. I haven't chech the pcv valve yet. Most of the smoke is when decelerating down hill and then accelerating. Any ideas on what I can do
hmm. if they have plastic valve covers, check them first. I would be very surprised if it was valve seals.
Tony great video, thx!
What did you do with the electrical sensor connector that goes into the factory flapper hose between the high side of the valve over and the rear inlet?
you keep that portion for the rear inlet. it's just a heater, you could get rid of it but I kept it.
Tony what are your thoughts on a breather oil filler cap with or without the check ball?
they seem pretty useless and stick. can't say I've seen a single person have great success with them.
I have a question because i've been working on this for sometime trying to tell people about it for years where im currently at the point where i have highside with flapper and lowside with full vacuum setup. but is there a way to make or find an adjustable flow valve, in essence works likes a one way check valve but it can be adjusted to let flow run the opposite way when adjusted for it. kinda like the current flapper valve but adjustable, because when you get higher HP/older cars with high hp you get more blow by because the amount of boost and the wear of the piston rings after so long, which would cause your amount of vacuum supplied to not be enough and without that vacuum i dont feel like it would pull oil sufficiently to do exactly that. i've also heard that the vacuum can assist in pulling the oil through your turbo drain lines which makes sense to a degree, but with bigger turbos i'd feel i might want just a bit more vacuum because the turbos are bigger, from what i see and read these turbos aren't meant to have oil built up in them because it can cause the seal to prematurely fail, thats why i think even ebay turbos might be viable if these steps are taken i've seen people in every class of turbo blow turbos VTT 19T 17T pures fraken etc and i think its a combination of people not knowing what should be done to prep there n54s for the power with upgraded twins "Bigger oil cooler, Full high and lowside PCV system, Upgraded outlets, full 3" dual exh or similar" the reason for exh is i feel the car came with 2.35 or 2.5 exh for the small turbos so you would need atleast 2.7 or 2.8 dual to make up for the exh flow difference with bigger turbos to stop back pressure from hurting your new turbos all these things in mind i dont support all ebay parts but a metal valve cover isn't a bad option for 200$.
you're absolutely right, I remember reading a thread where you adapted a bleed valve to the front timing cover and adjusted it to bleed enough vacuum, fine-tuning the exact amount you wanted on the valve cover. people would take a sacrificial oil cap and attach a vacuum gauge to it then dial in the exact amount they wanted. the valve had a filter on the end as well.
for the life of me, I can't find the thread I had saved with all the info, fitting sizes, etc. it would be great to fine-tune the PCV setup for sure.
and you're right, without a GOOD pcv setup, you can prematurely wear out upgraded turbos.
Can injectors spark plugs and leaky valve cover cause light smoke at idle?
injectors in a cold start and leaky valve cover definitely can!
@@tony.nextlevelridesThank you
Can I ask, how did you diagnose (with such accuracy) which valve stem oil seals were on their way out?
I'm smoking on startup, decel and acceleration... and sick of firing the parts cannon at it. I've replaced the valve cover, PCV valve, flapper valve & pipe, run stop-smoke through it... so I'm fairly sure mine are on their way out.
I'd really appreciate your input. Thanks!
unfortunately there's no easy way to tell without removing the turbos and visually inspecting each port ok the exhaust side. when all else fails, it starts to point (in your case) towards turbos or valve stem seals.
ensure the pcv you swapped is a good unit, not ebay or Amazon. they flow poorly. I'd only recommend the RB or BMS ones. nothing else.
@@tony.nextlevelridesthanks for the speedy reply. At the moment, I'm inclined to agree. The *only* remaining hope is a faulty oil level sensor, causing me to overfill. It's being drained on Friday. If 6.5ltrs comes out (roughly), I'll assume I've just wasted another £200 on a sensor and more oil.
Then, I'll order a compressor and valve stem kit.
good luck! keep us posted!
@@user-yy6if4kz3nwhat was the update
Do i need to tap into intake manifold if smoking on stock setup or just evap line and heater?
the evap. line is fine.
Thank you sir! For the flapper side you said to get a pcv valve but in the picture its the oem flapper. Did you cut the tubing off the flapper and replace with hose clamp and hose? I have a brand new oem ccv hose that i can use and is why i ask. Apreciate your time and knowledge brotha!@@tony.nextlevelrides
@punian yup! I take the tubing that can crack and replaced it with tubing. this is if you reuse the high side valve. tiger wise you can use a one-way valve as it would be the same thing.
Did this help for the smoking?
absolutely!
Still smoking PCV everything has been done, still poofs smoke but dosent smell like burnt oil.. Any ideas ??
what pcv did you use? internal or external? helped one guy who used a cheap China valve for the internal one that DOES NOT flow remotely close to what it should.
External with a catch can and all that, put in by a pro shop. Its so frustrating ...
@@tony.nextlevelrides The PCV was bad (OEM) so we put a Catch can. I was thinkin Vlave cover/Gasket ? its weird as the smoke doesnt smell liek oil but odd..
not losing coolant I am burning oil but thats blue and not much.
oil will smell and look different depending on where it's burned. if you want to shoot us a message ok Instagram I'll be happy to try and help.
Thank you, but I dont have Instagram or Facebook just another primary UA-cam account.. Can u give u my cell ?
Link to parts ?
they're in the description!
I wonder if bmw has observed that most of the cars on youtube that burn a lot of oil are bmw. I have a bmw x3 2.0 petrol driven 206,000 km and it also burns a lot of oil, about 3 ltr on 1000 km. I also have a mercedes b class 180 cdi driven 236,000 km and it uses minimal oil, and I also feel that it has more quality than an x3 in every way. Never more bmw for me after the x3 one day dies of internal bleeding of oil.
it's unfortunate, in most cases the pcv system on a bmw is extremely complex and complicated. if it's not perfect, any amount of issues can result.
@@tony.nextlevelrides Yes , that's right that's why I've just bought a new pcv valve to see if it helps since the compression test is good and the engine has no symptoms of bad valve seals. If that doesn't help, it could be worn/damaged oil rings, even if the compression is ok. It will probably be a lot of work to change it, because it's mounted under the intake manifold, I reckon. This oil burner N46B20B is a rarity in x3 and that is probably why there is little information about it on the web other than that it is a problem engine.
in a lot of bmw engines, the pcv system is integrated into the valve cover. might be worth looking into.
on others, worn valve stem seals is another issue becoming bigger each day!
mine never smoked on a cold start, only after driving harder and on decel.
your issue is sounding more like a turbo ready to pack it in to be honest.
@@tony.nextlevelrides Not on mine, I see that the PCV hose is connected to the top cover at the rear of the engine towards the coupe. I have some doubts that it is the valve seals because it does not smoke when starting at cold engine in the morning nor when braking hard when downshifting, but I do not completely rule it out either, since there is a lot of blue smoke when accelerating after slow driving and stopping at red traffic lights
Bro help me figure this dam car out lol.
what's going on? I can try to help!
@@tony.nextlevelrides thank u Tony . For the last 2-3 weeks I’ve been getting 0015 intake and exhaust codes randomly . I Switched replaced the Vanos Solenoids also the cam b and A sensors took it to my mechanical here locally in IL . And nothing. Can’t figure it out . then 2-3 days ago I noticed I’m getting a proof of smoke when coming to a stop. It’s a 08 335xi . Stage 2 VTT turbos all the piping is done intercooled . Tons and tons of mods.. And yes I know once I start modding that’s it .. . I night the car basically but and I love this car I really do but I can’t figure it out and it’s my daily as well. In the shop more than I can drive it . . Not alot of peole know or want to deal with it so here I am trying to figure it out and it’s no easy task. Also had the codes cleared but a pro with a pro computer . I as well have to use my FIXD scanner and clear codes all the time or I go Limp.
hate to say, you have two problems I believe. if the first ones is what I'm thinking about, it could be the cam ledges causing the codes. you can also check the vanos filters judg above the cam chain tensioner. I believe each of them are T56 torx, don't touch the tensioner.
secondly, if the pcv system is in check, it's possible you have a failing or leaky VTT turbo. you may need to pull the downpipes and see if it's pooling it one of the turbos.
worst case, you may have leaky valve stem seals, while not a common issue, it's creeping up as my e90 had it.
@@tony.nextlevelrides oh dam . Ok thanks . I’ll start by checking the Vanos filter . The smoke comes and goes and it seems like something is sticking . I just drove it an d had no smoke or codes … smh. I do see a small oil leak around the intercooler tho as it sat I saw a small drop at a few on the ground . The PCV VALVE on the other hand I have not looked and am just no reading about it and also the Cam Vent Hose or valve ? I appreciate it and will let u know what I find out . Hope it’s not a crazy expensive fix again . This cars is a piece of art but so dam expensive ..
@geogeo2551 they can definitely test your patience but it's worth the headache. they're good vehicles.