white smoke

[smellslikecurry]

this all pertains to a 1984 325e...stock everything...no chip...177K miles

after a rusty exhaust incident on the highway i recently i had a new exhaust welded on...no cat just 2.25 inch straight back to a dynomax

under deceleration lots of white smoke comes pouring out but only when the revs are really high up and theres a good amount of back pressure...i have no overheating problems and when im driving theres no white smoke

is this just extra unburnt fuel from running a little rich without a cat or is it coolant? my coolant levels seem fine

my mpg did go down slightly after the exhaust


anyone have this problem?? think it could be the valve seals? i dont know if im getting blow by the rings...

[jlevie]

White smoke is vaporized coolant, so it sounds like you have a leaking head gasket.

[smellslikecurry]

i thought if it was the head gasket there would be constant white smoke


not just white smoke after deceleration

[ethree]

Have you thought about getting a cat put back on?

[smellslikecurry]

no why??

[smellslikecurry]

anyone else? it hasnt happend in a few days...and no its not water condensation

[JasonC]

The no cat has nothing to do with it.



Sounds like the rings though. But then it would be more of a blue smoke.

[Devil Inc]

Over fueling would be black, carbon rich smoke. iirc.

[ADEN]

you seems to go very fast if yes then your rings starts to leak.
I'm having a black color exhaust i don't know what to do and my BMW consume a lot of gas.

[Quailane]

you seems to go very fast if yes then your rings starts to leak.
I'm having a black color exhaust i don't know what to do and my BMW consume a lot of gas.

Definitely sounds like something wrong with your fuel system.