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Guest
Anonymous Poster
embsanch@sbcglobal.net
May 12, 2007, 8:39 PM
Post #1 of 2
(1062 views)
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I just got a 1968 Cutlass and plan on doing some bodywork and painting it. There is a problem though. When driving it on the freeway I noticed smoke coming into the passenger compartment. Got home and had my lady rev her up while looking under the hood and found where it was coming from. It was coming from a hole on the left valve head/cylinder head(???). Check the pics and see if you guys can help. I labled the smoking hole smoke exit.
Let me know what you guys think...
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sbake58
Novice
May 24, 2007, 9:24 PM
Post #2 of 2
(1050 views)
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Re: Need help please
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That grommet is either for a PCV valve or it's the fresh air feed for the PCV valve. (positive crankcase ventilation) PCV valve purpose is to capture crankcase vapors as well as create a small amount of vacuum in the crankcase, and return those vapors into the intake manifold for reburn. All part of the emission system for less harmful vapors being released into the atmosphere. Anyway, sounds like the PCV valve is plugged, or the porting/hose suppling vacuum to it, Or.... you have too much blowby, which exceeds the ability of the PCV to capture. Least of all, the grommet is probably torn or broken which allows smoke to bypass.
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