18-10-2020, 07:08 PM
(18-10-2020, 06:54 PM)Alan Wrote: If money is an object- in the 70s when I had no money to spare I had a gudgeon pin work loose and seriously scored the bores. Acting on the advice of a very well respected Seven engine fettler, I replaced the errant con rod but left the bore alone. That engine went on to run in countless trials and the odd circuit race. I never noticed an oiling problem and only swapped it because I’d built a big valve block I wanted to use. What I’m saying is don’t worry too much. Find out what is is, fix the rings or the con rod. But, it should be fine.
Let me align with Alan here.
The compression is good, it doesn't burn oil so the bore isn't the issue. Don't worry about it.
However a rogue gudgeon pin needs dealing with.
It'll either be a small end clamp bolt or circlips/end pads. Fix these (trivial) and put it back together. If by chance the rod is knackered at the small end, a replacement rod may be needed. Again, not living hell, especially as I think you have a Big 7 which must have shells not white metal.
Charles
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