old trick for worn out engines
I am mentioning this..because I was telling a fellow to try it. I remove the piston and take the rod off, put the piston upside down on a firm surface. Using a 1/4 punch placed in the middle of the piston, I give it a smart hit....this slightly expands the piston, making a tight fit again. Only lasts so long, but you will get afew tanks out of it.
It doent hurt to warm it a bit....a bit....