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MH 175 Piston Sleeves

alvin j I have a MH175 with low hours. The piston sleeve in cylinder #4 broke apart and fell into the pan. I have the engine apart and have replaced the sleeve. The sleeve in #3 would slide about 1/4 inch while rotating the engine, so I replaced the sleeve and the piston and ring assembly.
My question is what caused the sleeves to become loose? What other things should I be looking for?
Thank you for any help.

GEEBEE Is this low hours on a rebuild or original motor ? If a rebuild ill fitting sleeves may have been installed or someone made the mistake of honing the bores so they went in easily. Are the new sleeves a tight fit ?, if not you could try using some Loctite
Alvin J Yes the motor is original. The new sleeves were put in a freezer for a couple of days and the block heated and they were still a snug fit going in. We are going to complete the assembly today, hoping the best. Thank you.




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