I've got a leaking oil pan gasket on my '94 F-150 4.9L-6. Looks like the gasket "squished" out somewhat during engine assembly at the factory. The area is right above the oil filter. It's not the filter, because the engine is high and dry above the rail. Time has gotten the better of the gasket, and now I've got a persistant leak.

How much of a job is it to change this thing out with the engine still in the truck? I don't mind lifting it off the mounts, but I really hate thinking about pulling the engine just to change this gasket. Looks like the gasket set up is two side rail pieces with front and rear "half-moon" pieces to go over the mains. I really only need to replace the left side rail piece; the other side is dry.

Has anyone pulled this off with the engine still in? How much of a nightmare was it? Give me your thoughts...

Thanks