Have you checked the vacuum at the crankcase?
If you have a vacuum guage (cheap and good to have in your toolbox if you are working on pcv system):
-1st-take a vacuum reading at idle from your dipstick before doing anything, I would expect no readable vacuum.
-2nd- tape off the oil fill cap/air inlets and test vacuum again from the dipstick, expect 1-3 hg(edit) at idle. This will tell you if your pcv valve(s) is/are sized correctly. You also should feel vacuum build if you put your hand over the open oil fill hole on the valve cover. This is a system test, NOT an operating condition.
If you are not letting air into the crankcase…..you should, the contaminated air is not get evacuated if you are not letting unrestricted clean outside air in.
Typical is 3/8 tube from pvc valve to carb or intake vacuum port, 5/8” (or bigger) from clean side of air filter to valve cover (or a valve cover filtered breather type cap).
Not sure of your engine, does it have slits in the valve cover that want to be closed up?
Last edited by Hanks custodian; 04/22/2024 3:33 PM.
