Oil past PCV
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Oil past PCV
After a complete Top-End rebuild of my 79 L-48, I have oil passing by the PCV. I installed an oil catch can which has resolved the issue of oil making it to the intake manifold. A compression check on all the cylinders revealed no problems before the build. Vette runs strong for an L-48 with 64K original miles. With compression increasing due to the build is this why I am now noticing this issue? If so, what is the fix if any?
Burning Brakes
Joined: Jul 2008
Posts: 876
Likes: 0
From: Canastota Ny
THIS SHOULD GIVE A GOOD IDEA OF WHAT IT IS AND WHAT IT DOES.
http://www.tegger.com/hondafaq/pcv-replace/index.html
just how much oil do you have in that line? there should be oil present as thats what the pcv valve does is take excess blow by / gases and due to the crankcase oil be pushed around like it is with the lifters there will be SOME oil present in the pcv line.
if it is passing right through completely then the valve is not working and needs to be replaced. around 4 bucks or so
http://www.tegger.com/hondafaq/pcv-replace/index.html
just how much oil do you have in that line? there should be oil present as thats what the pcv valve does is take excess blow by / gases and due to the crankcase oil be pushed around like it is with the lifters there will be SOME oil present in the pcv line.
if it is passing right through completely then the valve is not working and needs to be replaced. around 4 bucks or so
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
Does your valve cover have an oil-spray baffle below the PCV valve location? If not, the oil is just spraying directly into it and it would be almost impossible for it not to leak out. If you haven't changed valve covers (or PCV location) and the oil problem is new, maybe the PCV valve is stuck open.
Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Does your valve cover have an oil-spray baffle below the PCV valve location? If not, the oil is just spraying directly into it and it would be almost impossible for it not to leak out. If you haven't changed valve covers (or PCV location) and the oil problem is new, maybe the PCV valve is stuck open.
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas
Which valve cover is your PCV in? There was a thread on the forum awhile back that said the PCV needs to be in the drivers side valve cover. Apparently, it's easier for oil to get sucked up by the PCV when installed on the passenger side.
DC
DC
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Does your valve cover have an oil-spray baffle below the PCV valve location? If not, the oil is just spraying directly into it and it would be almost impossible for it not to leak out. If you haven't changed valve covers (or PCV location) and the oil problem is new, maybe the PCV valve is stuck open.
First thing I thought of: Aftermarket valve covers were put on with engine work?
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Thread Starter
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Thanks, 7T1vette. I'm also guessing that if the baffles are not doing their job as you specified then it might be time to look for new valve covers. I'll try your suggestion later today.