I have a 92 Previa LE that appears to be leaking from the cam cover. I have replaced the cover gasket and the o-ring around the distributor but it still leaks. Thanks for any suggestions.
Bruce

I had a similar problem. The cover itself was warped. You can lay it on a piece of glass for a primative test. If it is obviously warped that will tell you. Could be just bad enough to leak and not show so it is not fool-proof.

Mine still leaks, but it appears the feeder from the oil reservior is leaking and flows onto the cover and the exhaust. 329,000 and going.