My 1984 Corvette has had the PCV valve disconnected somewhere along the way by one of its previous owners and I am getting an excessive amount of oil into the air filter from the crankcase breather. Does anyone where I can find a diagram of how the original hook-up for the PCV valve hoses are suppose to be connected on the 1984. Any help is getting appreciated. Thanks.

 

PCV will go to a manifold vacuum source probably at the base of one of the throttle bodies from a valve cover. You should have one hose to the other valve cover drawing filtered air from your air filter housing. It's designed in a closed loop drawing filtered air through the crankcase and back into the PCV valve to a vacuum source to burn crankcase fumes. If it is hooked up right and the PCV filtered side is not stopped up and you are still getting oil in filter housing, check your engine by removing oil filler cap on a warmed up engine to see if there is any blow by, because that means rings. Sorry.

 

Thanks mech259. I'm hoping its not blow-by. Everything was running not to badly until I put on a new PCV valve and grommet as well as changing the hose and gromment on the valve cover on the opposite side. Thats when I started getting excessive oil to the air filter. I am thinking the old PCV valve must have had a weaker spring inside than the new one and was letting some fresh air in but I'm just guessing. Hoses have been unhooked for the emissions and for some reason they played around with the PCV valve. I have plugged up connections at the base throttle bodies but no unused hose connections at the other valve cover, so I'm not sure what to make of that. Thanks again.

 

After looking the manifold over carefully I found the inlet source at the manifold base. It had been plugged off with a metal plug. I put in a hose connection and hooked it up to the PCV valve one the one side and to the carbon canister for the air source for the PCV valve. It works great. No more oil mist. Thanks mech259.