View Full Version : Blue Smoke when shifting ????????????????????

06-11-2003, 11:54 AM
Hey guys, I was driving behind my buddy's '94 320i, and I noticed that whenever he shifted, there was a bit of blue smoke comming out of the tail pipe..... What the f**k could that be ??? Piston rings, oil comming in by the valve stems, head gasket ?????


06-11-2003, 03:08 PM
most likely the head gasket

M3ntal Kev
06-11-2003, 06:10 PM
I'd place my money on the valve stem seals.

06-11-2003, 07:47 PM
Originally posted by dropped_E30
most likely the head gasket

maybe...but if ur basing this on the civic we saw, that was the head thats cracked..and u gotta replace the gasket each time u take off the head..so i dunno

i agree with mental kev

06-11-2003, 08:27 PM
Is it during shifting or when ever you accelerate???

For example, would it produce blue smoke if you kept it in 2nd gear, around 40KM/h and accelerate up near redline (with out shifting). Basically, when ever you put a load on the engine.

From my experience, the valve stem seals only produced a puff of blue smoke at startup, and only after the car has been sitting for a while. .... but it wasn't a BMW.. so I could be wrong.

I'd say rings.