Smoking from exhaust probable causes thread.

TrollToll · 09-15-2016, 06:58 AM

Since this question is asked multiple times per week, I thought it would help to try and gather information in one thread. If you've dealt with smoking turbos, try and help others out with a little info :

1: When did it smoke? (cold start, warm start, idle, under load, decel, etc)

2: What was the cause?

3: Other info (oil used, mileage, catless, etc)

jcarv20s · 09-15-2016, 08:10 AM

1. Around 80K, after driving for a few minutes then stopping at say a traffic light.

2. TBD but I'm suspecting turbos as the wastegate rattle is terrible, one of the wastegastes is seized as well. Assuming it's a seal on the way out too.

3. OEM BMW fluids, 88K currently, catless VRSF DPs (been on the car for roughly 6 months.

justin895 · 09-16-2016, 10:09 AM

1: When did it smoke?
Cold Starts after the car would sit over night.

2: What was the cause?
Leaky Fuel injectors

3: Other info 125K miles. Index 7 Injectors and one Index 8 injector (Probably a recall replacement)

Replaced the Injectors and no more white bellowing smoke and a very smooth idle.

09-15-2016, 06:58 AM	#1
TrollToll Banned 654 Rep 946 Posts Drives: 535i Join Date: Sep 2015 Location: Texas iTrader: (0)	Smoking from exhaust probable causes thread. Since this question is asked multiple times per week, I thought it would help to try and gather information in one thread. If you've dealt with smoking turbos, try and help others out with a little info : 1: When did it smoke? (cold start, warm start, idle, under load, decel, etc) 2: What was the cause? 3: Other info (oil used, mileage, catless, etc)
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09-15-2016, 08:10 AM	#2
jcarv20s Second Lieutenant 19 Rep 210 Posts Drives: 2014 435i Join Date: Apr 2012 Location: Danbury, CT iTrader: (0)	1. Around 80K, after driving for a few minutes then stopping at say a traffic light. 2. TBD but I'm suspecting turbos as the wastegate rattle is terrible, one of the wastegastes is seized as well. Assuming it's a seal on the way out too. 3. OEM BMW fluids, 88K currently, catless VRSF DPs (been on the car for roughly 6 months.
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09-16-2016, 10:09 AM	#3
justin895 New Member 9 Rep 28 Posts Drives: 2008 BMW 335xi Join Date: Jul 2015 Location: Michigan iTrader: (0)	1: When did it smoke? Cold Starts after the car would sit over night. 2: What was the cause? Leaky Fuel injectors 3: Other info 125K miles. Index 7 Injectors and one Index 8 injector (Probably a recall replacement) Replaced the Injectors and no more white bellowing smoke and a very smooth idle.
	Appreciate 1 TrollToll654.00 Quote