I gather that cylinder wear tends to be the more common issue here - certainly never encountered piston failure myself although there are plenty of documented cases.
Trouble with enlargement of the piston is that it is virtually impossible to achieve permanent results there, although snake-oil salesmen on the Internet who will tell you otherwise are ten a penny.
Relining the cylinder, or in extreme cases swapping out the entire block, seem to be the only guaranteed remedies.
Last edited by: paulb on Sat 18 Dec 10 at 20:31
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