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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 > Turbo seal problems!!



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      12-30-2014, 08:08 PM   #1
zareh94
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Turbo seal problems!!

Guys how can i know if i have turbo seals when i take off the turbos??? My car smokes white from time to time i wana make sure if its from the turbos before buying new ones... Please!!
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      12-30-2014, 09:15 PM   #2
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Quote:
Originally Posted by zareh94
Guys how can i know if i have turbo seals when i take off the turbos??? My car smokes white from time to time i wana make sure if its from the turbos before buying new ones... Please!!
Typically if you remove the DP's and there is oil residue in them and in the turbine of the turbo that's a pretty good sign it's leaking. How many miles? How many of them is tuned? Catless DP's will smoke more than stock ones with cats
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      01-01-2015, 02:50 PM   #3
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Yep, oil in housing and if you look threw impeller with light you will see oil in there.
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      01-01-2015, 03:18 PM   #4
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Quote:
Originally Posted by robc1976
Yep, oil in housing and if you look threw impeller with light you will see oil in there.
Rob, what turbo is that? Looks like the turbine was contacting the housing.
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      01-01-2015, 03:33 PM   #5
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Quote:
Originally Posted by robc1976 View Post
Yep, oil in housing and if you look threw impeller with light you will see oil in there.
Turbine nut looks stripped also.
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      01-01-2015, 05:57 PM   #6
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My seals were leaking pretty bad and there wasn't a lot of visible evidence when the downpipes were off. It's hard to tell if it's your exhaust valve seals leaking (rare) vs the turbo seals. I had visual evidence (coking) on the outside of my turbos that, coupled with my boost targets (20 psi) and overall mileage (104k) made me guess it was turbos. I was correct.

Once the turbos were off it's easy to inspect.

It could also be related to PCV system but that's another problem solving thread on its own.
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