Toasted my engine

"nrp" wrote in message
oups.com...

It could be undertorqued too. In that case there would be a lot of
fretting under the base flange of the cylinder, and probably on the
main bearing webs too.

Yes, but that wouldn't have sheared the bolt at the jug stud ring as the OP
said it did. You would get fretting at that location, but I don't see a
failure mode in shear.


If it hasn't been disassembled yet, you might check the other
throughstuds to see what torque is required to very slightly further
tighten them - giving you an indication of how close to the spec the
previous assembler was.

And how much torque it takes to loosen a couple of them.

Jim