I had this same problem with one of my motorcycles. It took 1/2 the thread with it, so I got all the plug threads helicoiled. That fixed it and I never had a plug come loose in it again.
- KR> thrown plug j stevens
- KR> Re: bolts and screws into aluminum shou... Dan Heath
- KR> thrown plug StRaNgEdAyS
- KR> Thrown plug Colin & Bev Rainey
- KR> Thrown plug Doug Rupert
- KR> Thrown plug fixerjo...@aol.com
