I think I've tried every gasket and or sealer on my valve cover and it always end up leaking after a few weeks. I don't have any blow by going into the air box and the breathers are all open. Has anybody had better luck with any perticular gasket or silicone gasket maker? It's an 89 MJ, 2.5 plastic valve cover. Doesn't seam to be warped or cracked. Had 180,000 on my last 87 Mj and the valve cover was the only place it ever leaked oil from.
Thanks Glenn