PCV delima
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Instructor
Joined: Sep 2005
Posts: 166
Likes: 2
From: Marvin N.C.
PCV delima
My '65 has the original engine, but the previous owner changed the ventilation system to the more modern system using a pcv valve. It is a normal type setup with a pcv valve in the valve cover and the hose going into the large vacuum line on the front of the carb. (new Holly carb and aftermarket valve covers) Since the '65 didn't originally have this setup, how can I find out which pcv to use ? It is a 327/350hp engine. Local people have no idea and from what I've read, having the correct valve is important for the engine--and oil consumption. I've thought about just doing away with this system and putting a breather in both valve covers and leaving it at that. Is a pcv system really necessary for the engine or is it more of an environmental thing ? A breather in the valve covers would sure simplify things.
Tom
Tom
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
My '65 has the original engine, but the previous owner changed the ventilation system to the more modern system using a pcv valve. It is a normal type setup with a pcv valve in the valve cover and the hose going into the large vacuum line on the front of the carb. (new Holly carb and aftermarket valve covers) Since the '65 didn't originally have this setup, how can I find out which pcv to use ? It is a 327/350hp engine. Local people have no idea and from what I've read, having the correct valve is important for the engine--and oil consumption. I've thought about just doing away with this system and putting a breather in both valve covers and leaving it at that. Is a pcv system really necessary for the engine or is it more of an environmental thing ? A breather in the valve covers would sure simplify things.
Tom
Tom
What problem are you trying to fix?
http://www.corvetteamerica.com/cf/di...ategoryid=X690
Drifting
Joined: Dec 2002
Posts: 1,946
Likes: 28
From: Long Beach CA
A PCV system is an environmental thing -- burning the vapors rather than pumping them out into the atmosphere. Not sure about your 350, but the 327/300 I had in a '65 convertible some time ago had a road draft tube coming out the back next to the distributor. I sort of remember seeing some vendors that had a conversion to take off the road draft tube and install a PCV valve in that hole.
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
A PCV system is an environmental thing -- burning the vapors rather than pumping them out into the atmosphere. Not sure about your 350, but the 327/300 I had in a '65 convertible some time ago had a road draft tube coming out the back next to the distributor. I sort of remember seeing some vendors that had a conversion to take off the road draft tube and install a PCV valve in that hole.
The PCV system turned out to be one of the best things that ever happened to an internal combustion engine as far as keeping the engine clean inside, free of acid buildup, enhancing longevity, reducing oil leaks and keeping the outside of the engine free of blowby vapors.
