Originally Posted by raptortrail
You do not need to buy a new head you can repair it with a thread repair kit(heli-coil).Look at ebay under spark plug thread repair kit.It will just as strong as the original threads.
If it is a 14mm plug I have the kit. It is a TIME-SERT M14 X 1.25 SPARK PLUG REPAIR KIT.
I'll ship it to you with a deposit of $200 (yeah...I want it back or enough money to buy a new one) and when I get it back I'll refund deposit less my shipping cost and $20.00 for the insert.
Let me know if you are interested.