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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 > excessive smoke!!!help



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      11-04-2013, 04:15 PM   #1
zareh94
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excessive smoke!!!help

I get a excessive white smoke from my tailpipes after warm for hot startups what could it be??
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      11-04-2013, 05:24 PM   #2
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In a worst case scenario head gasket. Is drivability of the car effected?
Check your coolant level.
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      11-04-2013, 05:56 PM   #3
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If you have a serious coolant leak/burn it should be obvious. First and foremost, the low coolant warning (duh). Outside of that, the smoke would have a very distinct sweet/syrupy smell, and you’d be able to find trace amounts of coolant on the oil filler cap, and vice versa.

Oil loss/burn on the other hand is a serious pain to track down. N54s can leak the stuff from so many places. Generally speaking, the head gaskets and main+rear seals are pretty robust. A leaking OFHG or VCG could sneak by you, a leaky head gasket would be pretty obvious I’d imagine.
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      11-04-2013, 06:52 PM   #4
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I was having huge clouds of smoke coming from my tailpipes after the car warmed up. I also would have it when slowing down or stopping. It was a light gray color. My Valve Cover Gasket was leaking as was my OFH gasket. Replaced both same issue. After I replaced both primary O2 Sensors and let the car re-learn the smoke is gone. I cannot tell you how frustrated I was trying to figure it out.
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      11-04-2013, 06:57 PM   #5
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It could be turbo seal as well.
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