chuckndonna67
New member
I have a '88 YJ, AT, 6 banger. I have a stinking passenger cab. The rear port on the top of the valve cover emits oil fumes. I do not have that port vented to the air cleaner as standard as I was filling up the air cleaner with small amounts of oil which got soaked up by the air filter. So I just stuck a mushroom type filter of that rear port. The front port on top of the valve cover is of course the PCV valve which is working fine (plenty of suction). Now, the question: are there baffles inside the valve cover that could be plugged therefore not allowing the PCV valve to do its job in sucking fumes away from the valve housing? CAB :?: