White smoke on decel

donsaxena · 10-29-2012, 11:38 PM

I went to Cobb for a protune. Car pulled strong and everything seemed fine. I would get a good bit of white smoke after each hard dyno runs on the decel. Oil has been changed recently car does have a bms occ. I havent noticed it in town smoking nor on spirited drives. My mods are in my signature. All parts have been professionally installed.

addict135i · 10-29-2012, 11:58 PM

Exhaust?

Freon · 10-30-2012, 12:48 PM

I would be interested in seeing a video of this to see how bad it really is.

Depending on the weather, it could just be condensation. It may not be visible under load due to exhaust velocity and/or the temperature. Did you get hit by this cold front? One of the products of combustion is water, and it will be visible if the weather is cold and dry enough, and the exhaust is moving slowly enough out of the tailpipe.

Otherwise, white smoke generally indicates coolant, which is usually a blown head gasket. But our cars are not known for blowing head gaskets. Does it smell sweet? Like maple syrup? That would definitely indicate you are eating coolant.

I'm sure someone will say "turbo" but I'll pre-empt that and say incredibly unlikely. The water jack isn't open to the turbine shaft. Oil is, but that is generally slightly blue-tinted smoke, not white. Was it at all blue tinted?

Anyway, good luck interneting your research for this if your Protuner-licensed shop wasn't helpful in person. They should have know all of what I said above and been able to help you diagnose. Then again, lots of ignorant 25 year old kids with daddy's money opening shops these days...

Dackelone · 10-30-2012, 01:10 PM

Does your car have ANY cats? ie: do you have down pipes? Do you still have the mid pipe cats?

My bet is its your turbo shaft seals. Many FBO guys have reported white smoke like this. You could have a shop use a CO2 sniffer at the coolant res cap to check for CO2 leaking into your coolant. Is your coolant level Ok?

BostonBeemah · 10-30-2012, 05:29 PM

check out the Rob Beck replacement PCV valve..

1911A145 · 10-30-2012, 05:43 PM

The last turbo car that I had did the EXACT same thing... turbo seals were shot...

donsaxena · 10-30-2012, 09:09 PM

thanks for all your guys replies. I am using ar downpipes catless and hpf full exhaust. I will definitely look into co2 in the coolant and look into the rob beck pcv valve.

donsaxena · 10-30-2012, 09:17 PM

Quote:

Originally Posted by Freon

I would be interested in seeing a video of this to see how bad it really is.

Depending on the weather, it could just be condensation. It may not be visible under load due to exhaust velocity and/or the temperature. Did you get hit by this cold front? One of the products of combustion is water, and it will be visible if the weather is cold and dry enough, and the exhaust is moving slowly enough out of the tailpipe.

Otherwise, white smoke generally indicates coolant, which is usually a blown head gasket. But our cars are not known for blowing head gaskets. Does it smell sweet? Like maple syrup? That would definitely indicate you are eating coolant.

I'm sure someone will say "turbo" but I'll pre-empt that and say incredibly unlikely. The water jack isn't open to the turbine shaft. Oil is, but that is generally slightly blue-tinted smoke, not white. Was it at all blue tinted?

Anyway, good luck interneting your research for this if your Protuner-licensed shop wasn't helpful in person. They should have know all of what I said above and been able to help you diagnose. Then again, lots of ignorant 25 year old kids with daddy's money opening shops these days...

It is a good amount that came when they did my dyno wot the entire time on the decel. It wasn't always just flowing out on decel just at a point it would buff a good bit for 10s then stop. I did get hit by the cold front this was last saturday in Texas. Also there was no sweet smell to me it smelled like oil. I didn't see a blue tint at all in the smoke.

The shop was Cobb so I hope they know what they are doing.

donsaxena · 10-30-2012, 09:19 PM

Quote:

Originally Posted by 1911A145

The last turbo car that I had did the EXACT same thing... turbo seals were shot...

My shop doesn't seem to think that bc it is not just spewing smoke just a slight amount after heavy wot on decel. I will go check my coolant level.

Suds · 10-30-2012, 09:46 PM

Quote:

Originally Posted by donsaxena

My shop doesn't seem to think that bc it is not just spewing smoke just a slight amount after heavy wot on decel. I will go check my coolant level.

How much boost are the building on the tune and how many miles are on your car?

donsaxena · 10-31-2012, 12:06 AM

Quote:

Originally Posted by Suds

Quote:

Originally Posted by donsaxena

My shop doesn't seem to think that bc it is not just spewing smoke just a slight amount after heavy wot on decel. I will go check my coolant level.

How much boost are the building on the tune and how many miles are on your car?

I am about to hit 41k and after the protune I hit at the highest 19.6. On my p3cars gauge I don't see as high numbers as I previously did on stage 2 fmic aggressive map. Car seems to make boost pressure well.

erabmw135 · 11-05-2012, 10:23 AM

I have the same issue with 31k miles, lots of smoke on decel and idle not always but 75% of the time ... Going to have it checked out soon.. no performance drop car seems to run normal.. Im on stage 2 Agressive Cobb

donsaxena · 11-06-2012, 04:11 PM

Quote:

Originally Posted by erabmw135

I have the same issue with 31k miles, lots of smoke on decel and idle not always but 75% of the time ... Going to have it checked out soon.. no performance drop car seems to run normal.. Im on stage 2 Agressive Cobb

I have trouble seeing the smoke honestly on decel. I saw it on the dyno but not since. Do u actually see yours when u look through your rear windshield.

erabmw135 · 11-09-2012, 06:36 PM

Quote:

Originally Posted by donsaxena

I have trouble seeing the smoke honestly on decel. I saw it on the dyno but not since. Do u actually see yours when u look through your rear windshield.

Yea I can see it out the back and when I stop at a light nice amount comes out can't have windows down... got it checked this week and there is a leak, oil coming out of the turbos one more than the other. So definitely the seals are done. Time to for new turbos :/

donsaxena · 11-09-2012, 09:13 PM

Quote:

Originally Posted by erabmw135

Quote:

Originally Posted by donsaxena

I have trouble seeing the smoke honestly on decel. I saw it on the dyno but not since. Do u actually see yours when u look through your rear windshield.

Yea I can see it out the back and when I stop at a light nice amount comes out can't have windows down... got it checked this week and there is a leak, oil coming out of the turbos one more than the other. So definitely the seals are done. Time to for new turbos :/

That sucks they are covered for 88k or it may be time for RB turbos.

10-29-2012, 11:38 PM	#1
donsaxena Private First Class 13 Rep 165 Posts Drives: BMW 135i Join Date: Sep 2012 Location: oklahoma city iTrader: (0)	White smoke on decel I went to Cobb for a protune. Car pulled strong and everything seemed fine. I would get a good bit of white smoke after each hard dyno runs on the decel. Oil has been changed recently car does have a bms occ. I havent noticed it in town smoking nor on spirited drives. My mods are in my signature. All parts have been professionally installed. __________________ BMW 135i Jet Black AT. Hpf intercooler, Hpf exhaust, injen intake, ER competition oil coolers, ER charge pipe, Tial BOV, AR catless DP,BMS OCC, VMR 718s 19s, BMW performance spoiler, agency power rear diffuser, slek lip (on highway somewhere), FXomar abs lip, Ohlins Suspension, All M3 bits, Cobb protuned, turner 3 clutch LSD, Escort 9500ci
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10-29-2012, 11:58 PM	#2
addict135i Lieutenant 25 Rep 574 Posts Drives: 135i Join Date: May 2012 Location: Los Angeles iTrader: (3)	Exhaust?
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10-30-2012, 12:48 PM	#3
Freon Major 81 Rep 1,051 Posts Drives: 2009 135i Join Date: Nov 2007 Location: Indianapolis iTrader: (3)	I would be interested in seeing a video of this to see how bad it really is. Depending on the weather, it could just be condensation. It may not be visible under load due to exhaust velocity and/or the temperature. Did you get hit by this cold front? One of the products of combustion is water, and it will be visible if the weather is cold and dry enough, and the exhaust is moving slowly enough out of the tailpipe. Otherwise, white smoke generally indicates coolant, which is usually a blown head gasket. But our cars are not known for blowing head gaskets. Does it smell sweet? Like maple syrup? That would definitely indicate you are eating coolant. I'm sure someone will say "turbo" but I'll pre-empt that and say incredibly unlikely. The water jack isn't open to the turbine shaft. Oil is, but that is generally slightly blue-tinted smoke, not white. Was it at all blue tinted? Anyway, good luck interneting your research for this if your Protuner-licensed shop wasn't helpful in person. They should have know all of what I said above and been able to help you diagnose. Then again, lots of ignorant 25 year old kids with daddy's money opening shops these days... __________________ 2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
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10-30-2012, 01:10 PM	#4
Dackelone European Editor 10528 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	Does your car have ANY cats? ie: do you have down pipes? Do you still have the mid pipe cats? My bet is its your turbo shaft seals. Many FBO guys have reported white smoke like this. You could have a shop use a CO2 sniffer at the coolant res cap to check for CO2 leaking into your coolant. Is your coolant level Ok? __________________ Dackel's European Delivery Museum Guide
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10-30-2012, 05:29 PM	#5
BostonBeemah Lieutenant 72 Rep 524 Posts Drives: AW 135i 6spd Join Date: Sep 2011 Location: Belmont, Ma iTrader: (4)	check out the Rob Beck replacement PCV valve.. __________________ 2010 AW/BLK 135i VM 6465 Single Turbo, JB4 + MHD, VRSF CP & Tial, Big Tom, Fuel-It PI + Stage 3 + Return + Ethanol Sensor, BMW PE, MFactory LSD, Spec 3+ & MFactory SMFW, RB External PCV Best stock turbo 12.5 @ 19.46 spinning all the way down RIP 2008 AW/BL 135i
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10-30-2012, 05:43 PM	#6
1911A145 Captain 34 Rep 770 Posts Drives: 135i Join Date: Mar 2012 Location: Port Saint Lucie, FL iTrader: (4)	The last turbo car that I had did the EXACT same thing... turbo seals were shot...
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10-30-2012, 09:09 PM	#7
donsaxena Private First Class 13 Rep 165 Posts Drives: BMW 135i Join Date: Sep 2012 Location: oklahoma city iTrader: (0)	thanks for all your guys replies. I am using ar downpipes catless and hpf full exhaust. I will definitely look into co2 in the coolant and look into the rob beck pcv valve. __________________ BMW 135i Jet Black AT. Hpf intercooler, Hpf exhaust, injen intake, ER competition oil coolers, ER charge pipe, Tial BOV, AR catless DP,BMS OCC, VMR 718s 19s, BMW performance spoiler, agency power rear diffuser, slek lip (on highway somewhere), FXomar abs lip, Ohlins Suspension, All M3 bits, Cobb protuned, turner 3 clutch LSD, Escort 9500ci
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11-05-2012, 10:23 AM	#12
erabmw135 Private 6 Rep 93 Posts Drives: 328i Join Date: Jul 2012 Location: Miami iTrader: (0)	I have the same issue with 31k miles, lots of smoke on decel and idle not always but 75% of the time ... Going to have it checked out soon.. no performance drop car seems to run normal.. Im on stage 2 Agressive Cobb __________________ 2008 BMW 135i Jet Black AT - AK Downpipes, Berk Mid Pipe, BMS intake, AA Sport FMIC, AA Chargepipe & BOV, COBB AP, Alufelgen Sf-71 19s, Escort 9500ix
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