With an aluminum pan and a steel bolt, it's obvious which threads are wearing (stripping). Your message (#4) had the easiest, quickest and longest lasting repair - the helicoil. Have used on lots of VW cylinder heads for stripped spark plug holes.
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Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
3"girls" (2 Irish Setters - 1 Retriever) - RIP Annie & Emily (12/26/2017)
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