[C2] New engine
Thread Starter
Race Director
Joined: Nov 2003
Posts: 10,696
Likes: 3,090
From: Cottonwood AZ
C1 of Year Finalist (performance mods) 2019
I see what you’re saying. Forgot the air cleaner is the source for the incoming air for the crankcase. So your oil fill cap is not vented around the bottom?
In my case the air flow is reversed as I have a 63 FI unit with a PCV on the side of the plenum and incoming air enters the oil fill tube
Sorry for my confusion
In my case the air flow is reversed as I have a 63 FI unit with a PCV on the side of the plenum and incoming air enters the oil fill tube
Sorry for my confusion
Yes and yes. Oil fill cap seals the discharge side on a 1965. 1963 system is reversed from a 1965. This is always confusing when speaking of pcv systems not to mention over the years people have changed things from the factory.
Years ago John Hinkley wrote an article pcv 101 that addressed the evolution of all these systems.
See post # 10 in the following link for the article and after reading it you will see how it is easy to be confused by this issue from year to year.
https://www.corvetteforum.com/forums...post1606083598
Thread Starter
Race Director
Joined: Nov 2003
Posts: 10,696
Likes: 3,090
From: Cottonwood AZ
C1 of Year Finalist (performance mods) 2019
From the looks of your engine and the fact that you don’t have a draft tube hole in the back of the block it looks like both your suction side and discharge side are the same assuming the hose coming off of the oil fill tube is going either to the carb or into the intake manifold. I really doubt that your pcv system is operation properly but I would like to hear from other more qualified members on this subject.
