I suspect what you saw on your bolt was not a helicoil, but the aluminum of
the threads in the block plate you stripped out. Been there, done that...
I think the bolts that go into the aluminum plates in the front and back of
the engine are different than those that go into the cast iron block. Just a
vague remembrance, but they may be shorter so that they don't hit/bottom on
the main bearing cap which would cause the installer to tighten more and
strip out the threads....
Good luck!
Clark
"If it's not fun, why do it?" Ben & Jerry
Clark W. Nicholls
CWNicholls@aol.com
http://members.aol.com/CWNicholls
fax: 419-844-7564 (yes, 419)
phone: 413-243-3433
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