I have not heard of this being an issue on the V-10s but the 5.4 V-8s had this happen regularly. I would not use a helicoil. There are repair kits available that are much better than the helicoil in this application. The aluminum heads just are not very thick in the spark plug area. So they make a larger Steel insert that goes in the strip plug hole. and then you peen it in.
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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