lemur Posted 20 hours ago Report Share Posted 20 hours ago In theory; your piston wobbled because of either tightness in the wrist pin bearing or a jam sandwich in the piston rings. Quote Link to comment Share on other sites More sharing options...
jrsunt Posted 15 hours ago Report Share Posted 15 hours ago (edited) I’d be checking the internal diameter of the con rod small end. Even with the slightest play it will give a knocking noise. The piston doesn’t do much other than support the rings, which do all the hard work and wear considerably. If the con rod is slightly out of specification everything will wear as it won’t be runnng true and it will do the same again Edited 15 hours ago by jrsunt Quote Link to comment Share on other sites More sharing options...
bobb Posted 3 hours ago Author Report Share Posted 3 hours ago Lemur what do you mean with jam sandwich? Quote Link to comment Share on other sites More sharing options...
lemur Posted 31 minutes ago Report Share Posted 31 minutes ago 3 hours ago, bobb said: Lemur what do you mean with jam sandwich? When a piston ring pack becomes gummed up from bad fuel the rings stick in the piston grooves, then everything starts to go badly. Once you experience it you will know why I call it a jam sandwich. Quote Link to comment Share on other sites More sharing options...
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