khoward8509

iTrader: (3)

i had my car hooked up to a smoke machine today and it was leaking out of the oil fill cap???? its got me and my friend kinda puzzled i was hoping someone on here has had a issue like that or might know what that means

LS6427

iTrader: (2)

Where did you introduce the smoke?

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khoward8509

iTrader: (3)

he hooked it up through a vacuum line i wasnt there when he did it but it leaked through the throttle body a little bit and through the oil fill cap

LS6427

iTrader: (2)

Well, smoke could go into the intake, through the PCV line and into the valve cover, then into the crankcase and out the oil fill cap.

Only other way is getting by a piston ring.......if he hooked the smoke up to the front vacuum port on the passengers side of the intake.

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garygnu

put your hand over the oil filler tube and see if you feel any pressure on your hand.

khoward8509

iTrader: (3)

ill check it out tomorrow and let you know what i find out

patSS/00

iTrader: (6)

You can get a leak either at the cap itself or at the base of the filler neck (it has an O ring). Either way it's like a vacuum leak, the PCV will be pulling in un-metered air.

wrencher

iTrader: (2)

Normal with smoke machine testing. Fix the cap leak, the crankcase system needs to be sealed.