After Market Valve Covers

[rangerfng]

Ok all!!!!!!!!!!!!!!!!!!!!!

I am in need of your guidance . We have been working on our 1985 AMC Eagle Deluxe for several years now. essentially, we have rebuild the entire vehicle. Suspension, Trans, cooling system and engine has been done from top to bottom. We had purchased an aftermarket BML valve cover that looks beautiful on the vehicle. But, we keep blowing the gaskets. Im thinking that there is to much pressure in the crank that is causing this issue. Has anyone combated this issue and if so, how did you do it. Please help. I have a breather on the top of the valve cover. Would a PVC valve also help with the pressure. I ordered another valve cover and a heavy duty casket.

[MIPS]

If your PCV system is working at all you should not be blowing out cover gaskets unless you have some insane blow-by. Make sure your breather vent is not plugged.

[Artmodels]

On our 83 eagle, the valve cover has two pcv vents, one on the front right behind the rubber "bathtub stopper" oil filler hole(which leaks) and the rear pcv.  Front one has rubber tube that goes to vacuum side of carb, and rear one goes to a filter/baffle on the back of the air cleaner.  Both have lots of oil blowby, I guess it's time to replace, but wondering why there are two of them.....  Anyone know?

[Artmodels]

Just realized dummy previous owner put the crankcase vent coming from front valve cover elbow fitting over to intake manifold vacuum, and pcv from rear valve cover to air cleaner.

Would explain why there was so much oil from vent elbow as manifold was sucking mightily on that hose when at idle

[MIPS]

the rubber "bathtub stopper" oil filler hole(which leaks)

For that I can say the Gates aftermarket oil caps are too loose a fit. I used a socket and a hammer to press a washer into the underside of the cap to expand it a bit and it's a much tighter fit now.

[Artmodels]

Got success at auto zone, they had the exact oem style rubber oil cap for $4.00!  Went on real tight, no more oil blowby!