Its been soaking in kroil for 7 years....no joke - really. Its the original engine to one of my cars that I am not using - but i'd like to send it out for a rebuild. 7 years of soaking - thats seriously stuck
Kroil is useless for something like that .
I had a 400 that was stuck , but the crank wasn't stuck , i put it on an angle and sprayed PB blaster on the tops of all the pistons after hitting the walls with a wire brush on a drill to remove the scale. did one side then the other , long pipe on a breaker bar and a brass hammer hitting the tops of all the pistons I could reach and I got the thing to spin over. rust was only above the pistons though.
It was a 230 block but still needed 5 sleeves due to pitting and core shift.
