I’ve had an oil leak coming from the valve cover gasket for about 5 years now. Every time a mechanic changes it, it always ends up leaking. I’ve had 2 mechanic shops change it but no matter what, it always leaks. Any causes what it could be? Could it be that they’re just not putting it on right? I’d do it myself but I don’t have the tools for it and I don’t know what to look for. I notice the oil leaks down the front side of the engine on the passengers side and pools up near a little corner.