[Kaikun]

Hello everyone,

So I've been doing research about it but I wanna get some replies with my situation to narrow it more down for me.

I recently just replaced my turbos due to worn turbo seals and it was originally blowing smoke on deceleration. I have been driving it the past couple of days with the new turbos(OEM). I was getting on the freeway but the car started acting funny so I exited right away and pulled over to realize I was covered in smoke. Worse than before. My coolant and oil temps all seemed to be ok. No leaks under the car but the car was blowing crazy white smoke on idle and when I would rev it.

I let the car sit overnight. Checked oil cap and filter, Oil is clean. I checked the coolant reservoir, it did go down but not empty or anything wild, and it still looked clear and blue. I started the car up on a cold start and it started smoking right away from around the turbo area and out the exhaust. Same color smoke and it smelt like burned oil.

I also have no check engine lights or codes to base anything off of. Just the smoke and I would also occasionally hear a weird noise coming from the turbos. Like a turbo whistle or whine of some sort.

My guess is that the turbo seals just went out again due to the fact that I am running MHD stage 2 with catless downpipes, chargepipe, and intake. Maybe the turbos didn't break in enough and the fact that the tune is pushing upwards of 17psi.

The other possibilities that I have read have been a failing pcv system or bad injectors. I did replace my valve cover not too long ago with a cheap valve cover so I wouldn't be surprised that the pcv system inside the valve cover is crap. I do have index 11 injectors that have been on the car for the past two years I owned the car but they haven't given me any major issues.

If anyone has anymore info they can give me possibly just to narrow down my thoughts on what is going on with my situation. That would help a lot.

Thanks!

[iqraceworks]

Do the eazy stuff first.

Check for leaky injectors.
Replace your pcv valve with the aftermarket RB one.

I doubt your problem has anything to do with turbo seals....

[N54_e90]

Do RB PCV and put a catch can. Also when is the last time you did a walnut blast? I had a smoke on decel issue and once i did all 3 my smoking completely stopped. Thought I had blown turbos like everyone was suggesting.

If above doesn't help and ur loosing coolant could be headgaset leak hence the smoke?

[Kaikun]

Originally Posted by iqraceworks

Do the eazy stuff first.

Check for leaky injectors.
Replace your pcv valve with the aftermarket RB one.

I doubt your problem has anything to do with turbo seals....

Originally Posted by iqraceworks

Do the eazy stuff first.

Check for leaky injectors.
Replace your pcv valve with the aftermarket RB one.

I doubt your problem has anything to do with turbo seals....

I will definitely look into the injectors. Thanks!

[Kaikun]

Originally Posted by crazythedon

Do RB PCV and put a catch can. Also when is the last time you did a walnut blast? I had a smoke on decel issue and once i did all 3 my smoking completely stopped. Thought I had blown turbos like everyone was suggesting.

If above doesn't help and ur loosing coolant could be headgaset leak hence the smoke?

Originally Posted by crazythedon

Do RB PCV and put a catch can. Also when is the last time you did a walnut blast? I had a smoke on decel issue and once i did all 3 my smoking completely stopped. Thought I had blown turbos like everyone was suggesting.

If above doesn't help and ur loosing coolant could be headgaset leak hence the smoke?

I did do a slight walnut blast not too long ago. It did do the smoke on deceleration before when I had the bad turbos on. I do plan on upgrading the pcv valve or getting a breather system like and oil catch can that deletes the pcv valve.
Thanks!

[iqraceworks]

What's a "slight" walnut blast?

[Kaikun]

Originally Posted by iqraceworks

What's a "slight" walnut blast?

Originally Posted by iqraceworks

What's a "slight" walnut blast?

I attempted doing a walnut blast with my buddies own walnut blaster but I didn't get the BEST results. It could of been better.

[torrque]

sounds like worn valve seals to me.... When decelerating, your turbo is not spinning up by an means, can't be it.

[Kaikun]

Originally Posted by torrque

sounds like worn valve seals to me.... When decelerating, your turbo is not spinning up by an means, can't be it.

I'll def look into the valve seals. Thank you

[200,000 club]

Originally Posted by Kaikun

I'll def look into the valve seals. Thank you

Do you happen to know a guy named Spyro by chance?

[Kaikun]

Originally Posted by 200,000 club

Do you happen to know a guy named Spyro by chance?

I do not my friend

[Bimmer_Bro]

I would replace the pcv valve with the rb one. If you're getting a catch can get a vacuum side one. (as that's where most of the oil intake comes from).Boost side cc catch next to nothing in my experience.

[SixSix]

I went down this rabbit hole with my N54, to no avail... Turbos typically will only smoke under boost, I have heard of some cases where a drain line gets clogged which forces oil through the turbo seals, although this is not very common. Valve stem seals I have found to really only smoke on first start which you stated, but usually they don't continue to smoke after the engine has been running or on decel. This happens because when the car sits the oil is able to seep through the stem seals and into the cylinders, then on first start its all burned off. I think started with PCV/OCC is a good idea since these parts are relatively cheap and should be done anyways. I ended up sticking a borescope down into my cylinders, found an excess of carbon and wetness in cyl 4... So my final diagnosis on my car at least was my oil control rings. I highly doubt this is your issue because ring issues are quite uncommon on N54s. But its a worth a shot to at least check something off the list, plus I'm pretty sure you can get borescope attachments for your phone on amazon for like $20. I'm by no means an expert and this is just my 0.02

[Kaikun]

Originally Posted by Bimmer_Bro

I would replace the pcv valve with the rb one. If you're getting a catch can get a vacuum side one. (as that's where most of the oil intake comes from).Boost side cc catch next to nothing in my experience.

I did replace my pcv valve. I am still having issues. Check my new thread with more details about it.

https://www.bimmerpost.com/forums/sh...php?p=27060377

[Kaikun]

Originally Posted by SixSix

I went down this rabbit hole with my N54, to no avail... Turbos typically will only smoke under boost, I have heard of some cases where a drain line gets clogged which forces oil through the turbo seals, although this is not very common. Valve stem seals I have found to really only smoke on first start which you stated, but usually they don't continue to smoke after the engine has been running or on decel. This happens because when the car sits the oil is able to seep through the stem seals and into the cylinders, then on first start its all burned off. I think started with PCV/OCC is a good idea since these parts are relatively cheap and should be done anyways. I ended up sticking a borescope down into my cylinders, found an excess of carbon and wetness in cyl 4... So my final diagnosis on my car at least was my oil control rings. I highly doubt this is your issue because ring issues are quite uncommon on N54s. But its a worth a shot to at least check something off the list, plus I'm pretty sure you can get borescope attachments for your phone on amazon for like $20. I'm by no means an expert and this is just my 0.02

Hey. Thanks for the feedback, if you can. Check out my new thread since I am still having issues. Thank you!

https://www.bimmerpost.com/forums/sh...php?p=27060377