I've got a little 25 hp chinesium tractor. So no real formal specs to toss around. I rebuild this thing new last summer. All new internals and seals.
The sleeves are wet press in with two 4mm thick orings as seals on the bottom of the sleeves. Seals off the coolant from the oil sump.
I Noticed the oil was overfill one morning and lucky I checked further. It had leaked coolant to the oil. I pressurized the radiator and found the sleeve in fact dripping coolant pretty quick.
Pulled the sleeves no rolled or cut orings. Turns out the block bore is likely just overbored (china quality) for the liners and orings. Enough just to barely screw up a good seal. I sized up to 5mm. Way to big and cut the orings right away. Went to 4.5mm same appear to want to fit but they get shaved on every attempt. Used soap then grease and oil. Still cutting the rings.
The only size the will push in without damage is the 4mm but they do so by hand. Not tight enough seal. Thought of freezing the sleeves first and warming the block to see if I coukd press the 4.5 orings. Not sure if I'd have any luck and orings are 5 bucks a pop. Already gone through 12.
Any ideas on getting a seal trustworthy with smaller orings? Any ideas of pressing the larger orings without cutting? I'm at a loss for new ideas short of cleaning it all with Acetone and using silicone around orings and the bore.
The sleeves are wet press in with two 4mm thick orings as seals on the bottom of the sleeves. Seals off the coolant from the oil sump.
I Noticed the oil was overfill one morning and lucky I checked further. It had leaked coolant to the oil. I pressurized the radiator and found the sleeve in fact dripping coolant pretty quick.
Pulled the sleeves no rolled or cut orings. Turns out the block bore is likely just overbored (china quality) for the liners and orings. Enough just to barely screw up a good seal. I sized up to 5mm. Way to big and cut the orings right away. Went to 4.5mm same appear to want to fit but they get shaved on every attempt. Used soap then grease and oil. Still cutting the rings.
The only size the will push in without damage is the 4mm but they do so by hand. Not tight enough seal. Thought of freezing the sleeves first and warming the block to see if I coukd press the 4.5 orings. Not sure if I'd have any luck and orings are 5 bucks a pop. Already gone through 12.
Any ideas on getting a seal trustworthy with smaller orings? Any ideas of pressing the larger orings without cutting? I'm at a loss for new ideas short of cleaning it all with Acetone and using silicone around orings and the bore.