[davew833]

I know from experience that it CAN be done without pulling the engine. However, it does involve jacking up the engine sufficiently to raise the valve covers most of the way above the frame rails, so you have to unbolt the motor mounts. I didn't have easy access to an engine hoist when I did it, so I raised the engine. Knowing now how easy it is to pull the SVX (or most any Subaru) engine I'd definitely pull the engine if I had to do it again.