when I use a heat gun, the engine is still to tight to get unstuck after I shut it down. I've tried Sidewinder, RocketScience, and Werks fuel, it doesn't make a difference, it just gets this sticky film on it.

I was thinking about taking the sleeve out and heating it with the heat gun and pushing the piston to the top and letting it cool. after that I would have to heat it again to get it out, but I though maybe it would resize it just a bit....any thoughts on that?