White smoke decelerating - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

azynneo · 07-23-2016, 06:05 AM

I am running on e85 and a catless header followed by an edelbrock supercharger. I just noticed today that while decelerating after pushing my car pretty hard that there was white smoke coming out of my exhaust. I've read around and it says it could be a blown head gasket but I wanted to make sure if being catless and having e85 would do this.

azynneo · 07-23-2016, 06:07 AM

added info coolant temps were 192F while oil temps are 205-228 at it's highest

guybo · 07-23-2016, 06:22 AM

Check your oil for emulsion on the dip stick and also check your coolant reservoir if there's oil in that tank.

steve99 · 07-23-2016, 07:26 AM

As above its burning oil or coolant, note the oil may be from supercharger if the seals in the SC have gone, check the SC oil levels.

It may also be just a PCV valve or catch can overfull.

MyNameIsCacauate · 07-23-2016, 07:50 AM

might be your cats, is there residue?

Tcoat · 07-23-2016, 08:58 AM

Is it really humid there right now? Could just be water vapour. The SC, catless system and E85 all could contributed to more vapour in the exhaust than normal in really humid conditions.
Next time it happens roll down your windows and stop quick as possible so the cloud passes you and you may get a whiff. coolant smell sweet, oil smells like oil and water vapour will not smell like anything (or could have a slight sour odour since catless).

FRS Justin · 07-23-2016, 10:14 AM

If your intake is hooked to the pcv valve like a N/A or turbo set up its going to be blow-by. Basically you hit boost it blows thru the pcv and the when you let off and go to vacuum it sucks all the oil vapor into the intake. The pcv can not even hold 3 psi.

07-23-2016, 06:05 AM	#1
azynneo Senior Member Join Date: Jan 2014 Drives: FR-S Location: Cali Posts: 582 Thanks: 50 Thanked 44 Times in 34 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	White smoke decelerating I am running on e85 and a catless header followed by an edelbrock supercharger. I just noticed today that while decelerating after pushing my car pretty hard that there was white smoke coming out of my exhaust. I've read around and it says it could be a blown head gasket but I wanted to make sure if being catless and having e85 would do this.

07-23-2016, 08:58 AM	#6
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,283 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	Is it really humid there right now? Could just be water vapour. The SC, catless system and E85 all could contributed to more vapour in the exhaust than normal in really humid conditions. Next time it happens roll down your windows and stop quick as possible so the cloud passes you and you may get a whiff. coolant smell sweet, oil smells like oil and water vapour will not smell like anything (or could have a slight sour odour since catless). __________________ Racecar spelled backwards is Racecar, because Racecar.

07-23-2016, 10:14 AM	#7
FRS Justin Senior Member Join Date: May 2014 Drives: 2013 Asphalt FRS Location: San Antonio Posts: 994 Thanks: 693 Thanked 695 Times in 417 Posts Mentioned: 22 Post(s) Tagged: 1 Thread(s)	If your intake is hooked to the pcv valve like a N/A or turbo set up its going to be blow-by. Basically you hit boost it blows thru the pcv and the when you let off and go to vacuum it sucks all the oil vapor into the intake. The pcv can not even hold 3 psi. __________________ Instagram FT86PROJECT9S Facebook FT86PROJECT9S 710whp

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07-23-2016, 06:07 AM	#2
azynneo Senior Member Join Date: Jan 2014 Drives: FR-S Location: Cali Posts: 582 Thanks: 50 Thanked 44 Times in 34 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	added info coolant temps were 192F while oil temps are 205-228 at it's highest

07-23-2016, 06:22 AM	#3
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Check your oil for emulsion on the dip stick and also check your coolant reservoir if there's oil in that tank.

07-23-2016, 07:26 AM	#4
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,987 Times in 2,981 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	As above its burning oil or coolant, note the oil may be from supercharger if the seals in the SC have gone, check the SC oil levels. It may also be just a PCV valve or catch can overfull.

07-23-2016, 07:50 AM	#5
MyNameIsCacauate Member Join Date: Dec 2015 Drives: Impretzal Location: Coro Posts: 61 Thanks: 4 Thanked 2 Times in 2 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	might be your cats, is there residue?

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