I'm guessing impossible without pulling the sleeve all the off the piston. I tried it on my spare engine, on #2 (#1 sleeve is already off) and by the time I pulled the sleeve out far enough the lowest ring had popped out. I tried this before doing on my engine that is still in the van with the right head off. I've heard differing opinions about the need to replace that O ring. Thoughts? Personal experiences? I'd love to hear them! Thanks!!

Jeff Stewart