My car is leaking engine oil. I have been ignoring for quite some time, but at the moment i currently have it on 2 jackstands, and have the axle standing on a floor jack since im doing rear suspension work. Anyway, i got a set of valve cover gaskets (318 5.2) and im tempting to change them out myself. But im confused becasue i also heard that the engine oil pan can also be causing the leak. This car is i would say Grandpa's condition. Eventually the who entire drivetrain is going to have to be overhauled or replaced but i want to keep and do some mods to it. Any tips for changing the Gaskets out? i already have the sealant agent, and gaskets, all i need is a socket extender and im good. btw what's the bolt size for the valve covers?