Seen exactly these on N42 & N46. The chain tensioner bolt might give you a small leak if the washer is wrecked but if it comes loose the it can produce a crazy flow that will empty the engine! The valvetronic motor gasket is another leak point.
Just done all of these on my bmw. Another one which I found was leaking and needed the seal and gasket replacing was the eccentric shaft sensor. Its next to the oil cap under the plastic cover. When oil leaks into the plug your rev counter will soon jump about and eventually go into reduced power mode. The seal and gasket on cost me £6 from bmw and took 10 minutes to replace.
Hi Mark, just a quick question, you mentioned that oil could leak on that big silver bolt under coolant pipe to the block, strange enough my e90 320i N46, 2011 model has coolant leak ing out from that bolt. Any suggestions on that as I initially thought that the coolant leak was from that silver covered coolant pipe and replaced with new one and then saw it's actually leak on that big bolt. Is coolant supposed to leak from there? I am worried now as you mentioned on video that oil leaks from there. Is it possible to just get a new bolt rather as my one looks worn out?
@@Marksreviewsandtutorials Thank you Mark. Are the design of engine the same as SA? I checked that pipe above tensioner bolt again and not leaking from there but at the bottom of bolt. Bolt seems to be a little worn out, does not look solid. Think the coolant leaking is corroding bolt.
Great video. Got my e90 320i N46b20b fixed before watching though! Got a brand new OE vacuumpump :) There was a problem. And by myself I fixed the vanos o rings as well as the 2 gaskets at the oilcooler/housing
@@Cosminnegres-qx2uc on this engine, the PCV is integral to the rocker cover - under the round moulding next to the breather pipe connection at the back of the engine cover. There are kits for replacing the valve without removing the rocker cover, but requires cutting and resealing, so may not be a good idea.
Thank you Mark. You're an absolute legend. Just stumbled on your video, binge watched the whole playlist BMW series 1 (accidental purchase). I'm a bit worried to wash my engine bay to get rid of leak residue. Any suggestions?
So glad you enjoyed the series. Sneak peek we gave that car away. Video to come. 😀 Just spray on degreaser and hose off. I don’t recommend a pressure cleaner. Keep the water off the electrical a and the alternator. MRT
These engines 46 and 46T are prone to oil leaks and at the same time known for high oil consumption. My E90 leaked the oil from all possible places, including Valve Cover, Oil Pan, Camshaft sensor both intake and exhaust, vanos sensors, Oil filter housing, crankshaft as well as Oil pressure sensor underneath. Despite of no oil leak now, every 5K KM i need to add at least 500ml of engine oil to these engine (and yes there is no leak inside, no black or blue smoke on the exhaust)..
Hi sir i believe ur from Aus so i dont get your lingo quite well. I have a leak from what it seams the be side of the engine ( passenger side ) and most likely from a gasket failure. I am going to change it soon yet i would like to know if tappet covet gasget is the same as valve cover gasket
Here is how to change them. Changing BMW Vanos O'rings. Common Oil Leak spots n46. How to clean Remove & Replace. Accidental BMW ua-cam.com/video/wSiyccTfVK0/v-deo.html
Hi the leaking gaskets isn’t the main problem with these engines. It is if the valve stem seals fail. BMW blowing smoke? Valve stem seals the definitive test. ua-cam.com/video/R3NrMnl2Py0/v-deo.html If the valve stems seals are solid or have been replaced then these engines are great. I have had 6 BMW’s with different variances of these engines. MRT
Thanks video, I attempted myself today my 2.0i N46 Z4 Took 3 times, terrible leak dripping second attempt, first time missed a collar that had fell in It's so so sealed, looks like a small weap now, than a leak before. Any idea how keep gasket in place when re-fitting, it was hard to maintain in position.
The gasket should sit ok. Make sure it is well cleaned. You can also use a smear of silicone to hold a gasket in place, especially in tight corners. See the video changing tappet cover on n20. BMW Oil Issues Smoking & Leaking ua-cam.com/play/PLRRErA3V0MY1TKWJOU0hPZlqEi98F-A1b.html
my N43 is leaking on the left side of the engine, and it seems it's the "option 3" you were talking about; hopefully I'll have just to tighten the bolt; thanks for all the info, it is very informative! on the other note, I have two more problems - I can smell the petrol and on the rainy day I could see how it colors the water on the ground; the other one is that engine somehow losses cooling liquid; still have to find what's the reason and I must admit I fear a little to drive it in that state; and all that struck me all the once, not sure what happened, any idea?
I have found that my cars have always needed maintenance in blocks. They seem to have a few things go wrong at once. Then I get it all fixed up then they are good for awhile. Don’t be slow fixing the fuel leak.
My 120d 2011 plate keeps getting oil going over the top and runs down to the back in line with the plug harness did look at the oil cap lock look like you have a grove that makes the oil run out the filler cap neck then run down over the top
Hey Mark, i just bumped into your channel looking for info about oil leak at the oil pan in an N46 engine. You mentioned you have a friend that works on this engines...I recently changed my oil pan gasket because it was leaking but after that it still leaking a little bit at the back corner near the trans. Would you please ask your friend if the replacing of this gasket required to put silicone at the corners? I would really appreciate your help!
Hi, thank you very much. I checked all the points mentioned in the video, but mine leaks apparently at the bottom passenger side. Any suggestion? Thanks
hey i was looking for some information about BMW 320i 2006/ 2007 (110kw/150hp) . Can you please tell me is it expensive to own? i mean ,maintanance,common failures and stuff like that? On top of that ,does he really drink that much petrol ,and should i consider installing LPG? (mostly i drive only in city) .Thanks :)
Great video. I only had my daughters 2007 320i up on a hoist tonight after degreasing it a while back. I finally snuck in some hoist time from a friend and it’s looking like it’s the part you said was on the back of the head. From underneath looking up I can see some oil on the lower part of that mystery part. I call it a mystery part because I’m an electrical fitter not mechanic.🤷♂️ There was some oil on the sump gasket bolts and gasket, on the driver (lower) side of the engine. It still could be coming from that part above so I wanted to look into it first. I’d love any additional info on that part if you (or anyone else) has it? Is it easier enough to get to from above, is it a gasket ( I think you called it an O ring in the video🤔 Any help will be greatly received👍 I need this oil leak fixed so the car can be registered for my daughter (who at 17 thinks her life is slipping away) while she waits for me to repair the car she purchased😬
Hey Mark, i just bumped into your channel looking for info about oil leak at the oil pan in a N46 engine. You mentioned you have a friend thar works on this engines...I recently changed my oil pan gasket because it was leaking but after that it still leaking a little bit at the back corner near the trans. Would you please ask your friend if the replacing of that gasket required to put silicone at the 4 corners of the mate surface?
I would check higher first. Check the vac pump above that point. But look at my head gasket video on this engine and you’ll see we used silicone on the corners there. ua-cam.com/video/LtfOHglVVIk/v-deo.html
@@Marksreviewsandtutorials Hey, thanks for the reply. I did change the VCG about 6 month ago and i already checked the other common failure points of leaks above. Vacuum pump looks ok though. That’s why i was concerned about the use of silicone in the corners of the oil pan gasket (which i did not use) but i wanted to know if maybe i should have.
I've got the same engine n46nb20 and they starting to have blue smoke when accelerate from a stop and has a burnt oil smell from exhaust. Do you have that problem? A lot of people saying it's the valve stem seal. What does your bmw mechanic friend think about using 5w-40 instead of 5w-30?
Thicker oil isn't a good idea in a BMW it can muck up the Vanos. Watch this video to check your valve stem seals ua-cam.com/video/R3NrMnl2Py0/v-deo.html
@@Marksreviewsandtutorials thanks Mark. I've seen thay video and it terrifies me because the amount of work to replace them and I don't have BMW mechanic friend and the repair will probably cost more than the car itself. At the moment, I've ordered new PCV breather thank to you and also using liqui moly engine resealer. Though, I've only driven the car for 350km I've seen significant improvement as there is no more smoke on low rev. I thought to continue with liqui moly and another 5L 5w-30 and then decide.
Hi@@damiann4734 , i have exactly the same issue. how did the liqui moly work out for you a year later? i have gotten a new pcv breather and also could you please share a link to the luqui moly you got?
@damiann4734 Did the valve stem repair fix the issue permanently? Also I have a rough idle and and fluctuating rpms as I am decelerating to traffic stops, did you experience this too? The smoke comes when the engine has warmed up, usually when Ive driven a couple of miles. I have the exact same engine like you.
Also comes in the 2006 118i I msport. Thankyou for this vid saved me alot of money and time.
👌
Seen exactly these on N42 & N46. The chain tensioner bolt might give you a small leak if the washer is wrecked but if it comes loose the it can produce a crazy flow that will empty the engine! The valvetronic motor gasket is another leak point.
Great..., thanks mate. Got an E90 - 2010 N43, discovered it needed a new tappet cover gasket
Check this video to help you change the gasket. ua-cam.com/video/LtfOHglVVIk/v-deo.html
CHEERS! Good points made. Thank your BMW mate for us> This was going to cost a bomb!
Just done all of these on my bmw.
Another one which I found was leaking and needed the seal and gasket replacing was the eccentric shaft sensor.
Its next to the oil cap under the plastic cover.
When oil leaks into the plug your rev counter will soon jump about and eventually go into reduced power mode.
The seal and gasket on cost me £6 from bmw and took 10 minutes to replace.
Thanks for the tip Kyle
Thank you somuch. I'm off to finding out exactly where my engine leak is coming from👏🏾👏🏾
Hi Mark, just a quick question, you mentioned that oil could leak on that big silver bolt under coolant pipe to the block, strange enough my e90 320i N46, 2011 model has coolant leak ing out from that bolt. Any suggestions on that as I initially thought that the coolant leak was from that silver covered coolant pipe and replaced with new one and then saw it's actually leak on that big bolt. Is coolant supposed to leak from there? I am worried now as you mentioned on video that oil leaks from there. Is it possible to just get a new bolt rather as my one looks worn out?
The hose above the tensioner bolt carries coolant so big chance it is coming from there and dripping down. MRT
@@Marksreviewsandtutorials Thank you Mark. Are the design of engine the same as SA? I checked that pipe above tensioner bolt again and not leaking from there but at the bottom of bolt. Bolt seems to be a little worn out, does not look solid. Think the coolant leaking is corroding bolt.
Great video. Got my e90 320i N46b20b fixed before watching though!
Got a brand new OE vacuumpump :) There was a problem.
And by myself I fixed the vanos o rings as well as the 2 gaskets at the oilcooler/housing
Good job. Well done. MRT
Hello! bmw e90 320i n46b20b I can't find the pcv valve, do you know where it is?
@@Cosminnegres-qx2uc no clue, sorry
@@Cosminnegres-qx2uc on this engine, the PCV is integral to the rocker cover - under the round moulding next to the breather pipe connection at the back of the engine cover. There are kits for replacing the valve without removing the rocker cover, but requires cutting and resealing, so may not be a good idea.
Ru from NZ? If yes please recommend your mechanic..
Aussie Mate. :-)
Thank you Mark. You're an absolute legend.
Just stumbled on your video, binge watched the whole playlist BMW series 1 (accidental purchase).
I'm a bit worried to wash my engine bay to get rid of leak residue. Any suggestions?
So glad you enjoyed the series. Sneak peek we gave that car away. Video to come. 😀
Just spray on degreaser and hose off. I don’t recommend a pressure cleaner. Keep the water off the electrical a and the alternator. MRT
Thanks for this video. I seem to have an oil leak and when the car is idle with the power on I get some smoke at the back
That sounds like you could be getting oil on the exhaust manifold. That needs to be fixed straight away.
These engines 46 and 46T are prone to oil leaks and at the same time known for high oil consumption. My E90 leaked the oil from all possible places, including Valve Cover, Oil Pan, Camshaft sensor both intake and exhaust, vanos sensors, Oil filter housing, crankshaft as well as Oil pressure sensor underneath. Despite of no oil leak now, every 5K KM i need to add at least 500ml of engine oil to these engine (and yes there is no leak inside, no black or blue smoke on the exhaust)..
Despits the color being ok, does the exhaust gas smell ok, too? Then, difficult for me to tell the reason of the high consumption. Rgds
@@tspark1071 crank case breather valve was the culprit.
All bmw ebgines leak oil
Hello! at n46b20 where is the pcv valve?
It is the Vaccun pump for the brake cylinder on the back side, a common leak spot on BMW engines.
You sure right
Hi sir i believe ur from Aus so i dont get your lingo quite well. I have a leak from what it seams the be side of the engine ( passenger side ) and most likely from a gasket failure. I am going to change it soon yet i would like to know if tappet covet gasget is the same as valve cover gasket
Hi Mark I wonder if you could tell where the oil pressure sensor on this bmw is located. Many thanks
Thanks for the informative vidio
Thanks for video 📹 I have a question I have oil leaks from vanos solenoids connector, what do you think about it?What is the problem can be?
Here is how to change them.
Changing BMW Vanos O'rings. Common Oil Leak spots n46. How to clean Remove & Replace. Accidental BMW
ua-cam.com/video/wSiyccTfVK0/v-deo.html
How reliable are these once the issues are sorted.
Hi the leaking gaskets isn’t the main problem with these engines. It is if the valve stem seals fail.
BMW blowing smoke? Valve stem seals the definitive test.
ua-cam.com/video/R3NrMnl2Py0/v-deo.html
If the valve stems seals are solid or have been replaced then these engines are great. I have had 6 BMW’s with different variances of these engines. MRT
Thanks video, I attempted myself today my 2.0i N46 Z4
Took 3 times, terrible leak dripping second attempt, first time missed a collar that had fell in
It's so so sealed, looks like a small weap now, than a leak before. Any idea how keep gasket in place when re-fitting, it was hard to maintain in position.
The gasket should sit ok. Make sure it is well cleaned. You can also use a smear of silicone to hold a gasket in place, especially in tight corners. See the video changing tappet cover on n20.
BMW Oil Issues Smoking & Leaking
ua-cam.com/play/PLRRErA3V0MY1TKWJOU0hPZlqEi98F-A1b.html
@@Marksreviewsandtutorials Thanks , upto 12 / 21 playlist.
my N43 is leaking on the left side of the engine, and it seems it's the "option 3" you were talking about; hopefully I'll have just to tighten the bolt; thanks for all the info, it is very informative!
on the other note, I have two more problems - I can smell the petrol and on the rainy day I could see how it colors the water on the ground; the other one is that engine somehow losses cooling liquid; still have to find what's the reason and I must admit I fear a little to drive it in that state; and all that struck me all the once, not sure what happened, any idea?
I have found that my cars have always needed maintenance in blocks. They seem to have a few things go wrong at once. Then I get it all fixed up then they are good for awhile.
Don’t be slow fixing the fuel leak.
@@Marksreviewsandtutorials thanks, will fix it as fast as I can
Thank you 👍🏻
So to change sump gasket engine has to be lifted?
What about the oil cap?
My 120d 2011 plate keeps getting oil going over the top and runs down to the back in line with the plug harness did look at the oil cap lock look like you have a grove that makes the oil run out the filler cap neck then run down over the top
Hey Mark, i just bumped into your channel looking for info about oil leak at the oil pan in an N46 engine. You mentioned you have a friend that works on this engines...I recently changed my oil pan gasket because it was leaking but after that it still leaking a little bit at the back corner near the trans. Would you please ask your friend if the replacing of this gasket required to put silicone at the corners?
I would really appreciate your help!
Hi, thank you very much. I checked all the points mentioned in the video, but mine leaks apparently at the bottom passenger side. Any suggestion? Thanks
Clean your engine up (degrease) and then see if you can see the leaks, it maybe gathering at the bottom but leaking from the top.
@@Marksreviewsandtutorials Thanks, I'll do that
Thnxs so much!
Happy to help
@@Marksreviewsandtutorials great vid bud 1 like from me BUT HOW DID YOU CLEAN THE OIL BUD? hello from uk
hey i was looking for some information about BMW 320i 2006/ 2007 (110kw/150hp) . Can you please tell me is it expensive to own? i mean ,maintanance,common failures and stuff like that? On top of that ,does he really drink that much petrol ,and should i consider installing LPG? (mostly i drive only in city) .Thanks :)
Great video. I only had my daughters 2007 320i up on a hoist tonight after degreasing it a while back. I finally snuck in some hoist time from a friend and it’s looking like it’s the part you said was on the back of the head. From underneath looking up I can see some oil on the lower part of that mystery part.
I call it a mystery part because I’m an electrical fitter not mechanic.🤷♂️
There was some oil on the sump gasket bolts and gasket, on the driver (lower) side of the engine. It still could be coming from that part above so I wanted to look into it first.
I’d love any additional info on that part if you (or anyone else) has it?
Is it easier enough to get to from above, is it a gasket ( I think you called it an O ring in the video🤔
Any help will be greatly received👍
I need this oil leak fixed so the car can be registered for my daughter (who at 17 thinks her life is slipping away) while she waits for me to repair the car she purchased😬
It’s a vacuum pump back there.
Wondering how you went with solving your rear head oil leak issue?
Hey Mark, i just bumped into your channel looking for info about oil leak at the oil pan in a N46 engine. You mentioned you have a friend thar works on this engines...I recently changed my oil pan gasket because it was leaking but after that it still leaking a little bit at the back corner near the trans. Would you please ask your friend if the replacing of that gasket required to put silicone at the 4 corners of the mate surface?
I would check higher first. Check the vac pump above that point. But look at my head gasket video on this engine and you’ll see we used silicone on the corners there.
ua-cam.com/video/LtfOHglVVIk/v-deo.html
@@Marksreviewsandtutorials Hey, thanks for the reply. I did change the VCG about 6 month ago and i already checked the other common failure points of leaks above. Vacuum pump looks ok though. That’s why i was concerned about the use of silicone in the corners of the oil pan gasket (which i did not use) but i wanted to know if maybe i should have.
I've got the same engine n46nb20 and they starting to have blue smoke when accelerate from a stop and has a burnt oil smell from exhaust. Do you have that problem? A lot of people saying it's the valve stem seal. What does your bmw mechanic friend think about using 5w-40 instead of 5w-30?
Thicker oil isn't a good idea in a BMW it can muck up the Vanos. Watch this video to check your valve stem seals ua-cam.com/video/R3NrMnl2Py0/v-deo.html
@@Marksreviewsandtutorials thanks Mark. I've seen thay video and it terrifies me because the amount of work to replace them and I don't have BMW mechanic friend and the repair will probably cost more than the car itself. At the moment, I've ordered new PCV breather thank to you and also using liqui moly engine resealer. Though, I've only driven the car for 350km I've seen significant improvement as there is no more smoke on low rev. I thought to continue with liqui moly and another 5L 5w-30 and then decide.
Hi@@damiann4734 , i have exactly the same issue. how did the liqui moly work out for you a year later? i have gotten a new pcv breather and also could you please share a link to the luqui moly you got?
@@vicenttugume3600 doesn't work. Better off changing the stem valve seals. I got the liqui moly from supercheap it's called engine oil resealer.
@damiann4734 Did the valve stem repair fix the issue permanently? Also I have a rough idle and and fluctuating rpms as I am decelerating to traffic stops, did you experience this too? The smoke comes when the engine has warmed up, usually when Ive driven a couple of miles. I have the exact same engine like you.
Ud swear that pic at the start was pulled from my e46. Can this sorta shit cause knock?
This causes loss of oil. If you don't top it up yes.
These cars actually leak oil from the factory, try fix the leaks all you can but it will come back to haunt you 😂
I have a bmw 116i, how do I clean the oil leak (near the cover gasket and vanos) and what's it like to repair?
En español traducción
N45 engine....not 43!!!!!!!
n45 doesn't have valvetronic so nope
n46 however does