[AT] 430V

[toma at risingnet.net]

>
> If you can, Go get one of the cans of R134A with a trigger on it and a
> low side adapter fitting. Rig the adapter fitting to a hose you can play
> on the back of the piston.
> Now put on GLOVES, a face shield and better gloves....  Flip the can
> upside down and you will have liquid R134a that you can spray on the
> bottom of the piston. BE VERY CAREFULL, 134A can easily freeze your
> skin. Shoot a bit at the skirt and bottom of the piston head.
>
> Then shoot some into the plug hole. As it boils off it will make that
> piston COLD, and should shrink it away from the cylinder walls.
>
> Let all the 134 boil off, then try to rock the engine gently.
>
> FYI R134A boils off at 15 below zero which is why you need to be careful.


I agree, worth a try. When I bought my first Cat 20 when I was 17 years 
old I got it unstuck by setting a chunk of Dry ice on each piston.


Tom