Take a chunk of 4X4 10-12 inches long and your 2lb hammer and give each piston a few solid (not crazy hard) whacks. Remember you are not trying to move the piston just vibrate it a bit. Let it set with a different “rust buster” on top of each piston. The vibration of the hits may be enough to let the chemicals work their magic. No heat on the pistons just yet. Good luck.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
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