Seized Piston Rings, Best Method to Remove Piston Options

[SteveNMaine]

I recently started a rebuild on a seized 1.8. I found that moisture has seized the rings and the exhaust valve on #2 cylinder. The piston is seized near the top of the exhaust stroke.

Any suggestions to free up the piston rings? I have heated the top of the piston, used penetrating oil, tapped with a mallet, etc. So far, no joy.

[Aayala]

I recently started a rebuild on a seized 1.8. I found that moisture has seized the rings and the exhaust valve on #2 cylinder. The piston is seized near the top of the exhaust stroke.

Any suggestions to free up the piston rings? I have heated the top of the piston, used penetrating oil, tapped with a mallet, etc. So far, no joy.

I don’t know if this is a sign or not… but literally in the process of tearing down the 1.8 engine of mine. My cylinder #1 was seized and no kidding JUST got it stuck 10 minutes ago. I took it apart entirely for a rebuild but the cylinder was stuck to the piston ring and couldn’t pull the cylinder out. I rotated the engine on the stand at 90 degrees so the pistons are facing the ceiling and poured mystery oil to the brim of the cylinder. (Like an inch of fluid because it was near the top) and waited 24 hours and still stuck. Got a brass brush and scrubbed the sides waited for a bit and then put a wrench on the crank shaft and rotated it back and fourth as to knock it loose and it FINALLY DID IT! Got that thing out. Good luck with yours!