Cast Aluminum Valve Covers Leaking

Using some RTV on the cork gaskets both valve cover side and also head side is the best idea. Take cover off. Clean channel/lip gasket sits on. Put a thin rtv line down and press gasket into it. Then put another thin of RTV on the gasket and put them on head. Bolt it down. Let it sit about 30-60 minutes before starting it.

Riddler