One who does not know any better might guess that, the truth is that it will only ruin the fit of the piston and sleeve. A tight fit when cold is what you want with a ABC cylinder/piston.

I would send that engine back to where it came. Even if you manage to clean the compound out before you run it, there will still be some embeded in the piston and it will only shorten its life.

Maybe the engine you recieved was a return, sold to you as new.


Mike