You should be able to put your thumb over the top of the sleeve (with the head off of course) and rotate the engine, it should push your thumb off if it has good compression. It wont throw you across the room but should just puff it off. You will feel the pressure.

Also with the head off the piston should push the sleeve up out of the case when you rotate the engine over. If the piston goes to the top of the sleeve with ease then back down, its time for a new piston and sleeve.


Dbow