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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Help! Lots of white smoke, Milky oil cap, no codes or faults...



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      Yesterday, 07:53 PM   #1
Scotty89
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Unhappy Help! Lots of white smoke, Milky oil cap, no codes or faults...

Car is 2007 e92 335i N54 with down pipes and wedge e85 flash. The car has 117,000km (72,000 miles) and is still on original turbos.

Recently been getting quite a bit of what I thought was steam from the exhaust on cold mornings. Slowly it has been getting worse, and has now turned into huge amounts of white smoke/steam while idling.

I did a complete oil and coolant flush yesterday and the problem stopped for about 5 minutes once the car was started up again, then the same white smoke clouds came back.

I did have the turbo siren noise for months (prior to e85 flash), yet the car continued to drive perfectly fine. Now the car still runs fine - though I am having boost issues (which is probably due to old solenoids, soon to be replaced).

From reading other threads I am seeing others with similar problem being told their turbo seals have now failed. (Which is disappointing, but a relief that it is not a problem with the engine itself!)

What I don't understand is:
  • The oil cap was slightly milky when I added the oil flush before oil change.
  • The oil once drained into pan, had absolutely no signs of milky oil.
  • The coolant does not appear have oil in it.
  • The car has been consuming coolant slowly over months, requiring top-ups
  • The car has not been consuming oil, requiring very little top ups between oil services.
  • Oil Catch Can has been on since last oil service (5000 miles, 7500km) and there was no oil caught in it, only a drip or two at the bottom.
  • The intercooler had only slight oil in the cool side (from diverter valves), however intercooler had been installed prior to forge DV and oil catch can and not emptied since.

From my limited knowledge, a milky oil cap is usually a death sign for a blown head gasket? but then normally the sump oil is completely milky as well?

If this is the turbo seal... I have no option other than to remove them and get fresh turbos in - but in the meantime will this cause any further damage to the engine?

Other than stacks of white smoke, and frequent coolant top-ups, can I continue to drive the car daily, until I have an opportunity to remove turbos myself?



Thanks in advance!

Last edited by Scotty89; Yesterday at 10:37 PM. Reason: Video added
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      Yesterday, 07:56 PM   #2
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Wicked valve cover gasket failure? Could be dropping oil onto the turbos causing the smoke, and is a culprit of quite a few things you listed.
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      Yesterday, 08:07 PM   #3
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Bro read my thread, I'm going through the same exact thing right now..! Sooo pissed though! My cars going to BMW Monday morning and being diagnosed by a warranty/claims person because I'm arguing that it's the wastegates that caused the turbos to go bad.. What a hell of a time trying to get cooperation though, one of the service advisors had no idea what I was talking about when referencing the Turbo/Wastegate Extended Warranty of 8yrs/82k miles... Haven't drove my car in about a month, so I'm hoping something gets done relatively quick about this.!!
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      Yesterday, 09:26 PM   #4
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Get a shop to analyze the exhaust.

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      Today, 12:36 AM   #5
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Do you have any plans to take it to a dealer or Indy instead of asking a forum
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      Today, 12:47 AM   #6
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Oil in coolant could be a slight OFH leak, smoke could be from turbo seals
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      Today, 02:07 AM   #7
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Quote:
Originally Posted by 924er View Post
Do you have any plans to take it to a dealer or Indy instead of asking a forum
Yes, though either way it's going to mean days off work to get to a shop, days without a car for a shop to diagnose, and $$$ to spend based on their diagnosis.

I was hoping for some troubleshooting advice so I can get an idea myself, as there are not a lot of trusted BMW specialists around me.

Quote:
Originally Posted by spxxx View Post
Oil in coolant could be a slight OFH leak, smoke could be from turbo seals
That's what I'd have thought if there was oil in coolant.

What about coolant in oil instead...?

From my understanding the oil system is under higher pressure than the coolant system?
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      Today, 02:07 AM   #8
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sometimes white smoke out of the exhaust is leaking injectors (does it continue to smoke after shutting the car off?)

maybe pull the plugs and check to see if they're wet?

Otherwise if its coolant, it will have a sweet type of odor..

How old was the oil that was milky? You mentioned you've been running E85?
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