when the casing change its form.

[genovia]

Hello Gang,

I'm in the process of putting together an OS Hyper (repair). and ran into a problem of getting my cylinder to fit back into the engine, it would go in, but only 1 1/.8' into the case. I was thinking wet sanding or buffing the inside of the engine case to I can slide the cylinder inside the motor case.... I know, newbie brains at work.

But my simply reheating the motor case. Not hot, but mild heat, I was able to re-expand the motor case and easily slide the new cylinder inside.
And by leaving the cylinder inside the motor case until it cooled down, I'm re-formed the case, so it easy to take the cylinder in and out..

Thought, I'd share my newbie excitement.

[flyinfool]

Glad to see that you did not sand or buff anything.
It is supposed to be a tight fit.
Your solution of lightly heating the case to slide in the cylinder was a very good solution.
Make sure that all of the parts are lightly oiled before you start the engine.

[blakka_1]

I second Jeff's words. :)

[genovia]

I flew the engine today :glasses2: :glasses2: with new boca bearings top and bottom it flew like a hyper. I must admit, I was nervous, thinking that it might explode :mrgreen:

[WillJames]

Glad to hear it went well!! Don't you just love it when you do your own repair and it works out!! Good job!!! :thumbup: