My Ford dealer used a helicoil insert in my 2000 Expedition's 5.4 liter V8, aluminum heads (famous for blowing out spark plugs!) about 5 yrs. ago. It's held very well since then.
Hope there's no problems with the new head!
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Cub Cadet 86
Mahindra eMax 22 w/FEL
Husqvarna LGT2554
John Deere GT275
'48 Ford 8N
'41 Ford 9N
Yerf Dog Scout CUV
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