spark plug popped out; adaptor won't screw back in

[tinatee]

I'm having a problem with my spark plug staying in place after a tune up. I tried an adaptor and it worked for almost a day and then the spark plug popped out of the adaptor. adaptor stayed in place. i was only able to get a cheaper, different spark plug from the ones I had put in for the tune up. I got the same type spark plug today and when I tried to take it out, the adaptor came out too and now it won't go back in. what can i do?

[marklj]

You can try a sparkplug thread chaser to clean up the original threads. However, if the threads are really chewed up bad you can try a heli-coil.

http://www.emhart.com/brands/heli-coil

http://www.youtube.com/watch?feature...VzE5cOWac&NR=1

http://shop.advanceautoparts.com/Car...d_Heli-Coil___

[POS carb]

the hole in the cylinder head is screwed. Like Mark said, you need to helicoil it and I hope it isn't cyl #1