ok, so i was helping my buddy replace a headgasket in his d15, well when i pulled the intake mani off, there was a little smoke coming out, well then i pulled the valve cover off, it was smoking for like, half an hour, anyone know what could be causing this smoke any other questions?

 

was the engine hot and the weather cold?

 

pcv not working and gases staying in valve cover & crank instead of vacuumed and burned in cylinder? just a guess.
why did you take the intake mani off for a headgasket swap?
also how was the oil? dirty crap or any water/antifreeze in there?

 

that would be my guess

 

LOl, steam

 

well it was cold out, yes, but we were in a heated garage.... and i always take the IM off when i do it just so its lighter and i dont have to take as much off to take the head out, i dunno i guess its just easier, expecially since its only DPFI so there isnt as many nuts, but i mean it was coming out of every oriface it could in the head.. dipstick tube, oil fill cap, cylinder head intake ports/exhaust ports, so i dunno, something to do with the oil? or would it be the pcv...

 

i always take my manifold off as well, like u said it makes it a bit easyer an all, id have to guess its your pcv system, is the motor stock?

 

^lol

i only take the IM off when i'm doing it by myself, but if i have help i leave it on. id guess its your pcv system