Hello All:

       I have an engine that I suspect has a stuck ring.  My questions are:

      How does one determine if the ring is stuck?

      How does one free a stuck ring?

       The engine has a conventional  ring on an aluminum piston.  I have attempted to press the ring into the groove but to no avail.  The ends of the ring at the gap are very well polished.  This may be an indication that the ring is indeed stuck.  I have been soaking the piston/ring in acetone for several weeks.  This has not freed the ring.  I have heated the piston/ring to 300 degrees F but this did nothing.  Perhaps I will boil the p&c in some water that has a bit of dishwashing liquid added.  Perhaps a trip in the ultrasonic cleaner may help. Last but not least, the crock pot treatment.  For some reason, the crock pot method has done nothing for me for cleaning engines for a long time.  Am I using incorrect anti freeze or will any type of antifreeze suffice?

        What to do next?

                                                                                                                    Tia,

                                                                                                                    Frank McCune