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Thread inserts and thermal expansion

posted by  Will740turbo on  Sat Oct 8 10:50 CST 2011
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

I was just looking across this Napa store on my last day and my eyes landed on a thread insert. Not a helicoil, a full-on thin-wall thread insert like the "save-a-thread" kits have.

Our B23/0's have aluminum heads. The insert I put in my old B230's head seemed like steel. The kit made no mention of it, but I was just thinking about thermal expansion, heat transfer, and plug heat ranges.
Initially I was wondering if having an insert in the head would eventually damage it from unequal thermal expansion.

Cheers!






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