I've replaced the black rings with the engine out. I wouldn't if you're
working with the engine installed. I use a dental pick to remove them, as
Steve surmised.

With the engine out it's also possible to access the connecting rod bolts
using a long wobble extension, and remove the pistons/cylinders that way.
Then the groove can be properly cleaned for that o-ring. Of course at that
point you'll decide you might as well change the connecting
rods/bolts/bearings, and some new piston rings wouldn't hurt...

Angus

On Thu, Feb 20, 2014 at 7:04 PM, J Stewart <fonman4277@comcast.net> wrote:

> 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
>