Spark plug hole thread repair?

[rkildu]

I had this over in the Air Head section but only got one response.

This has probably been covered here before, but a search turned up nothing.

I have some suspect spark plug hole threads on my 82 R100. I plan to pull the heads and clean things up, if possible, it might be just carbon?

If a major repair is needed, what is the best option?

Thanks
Rod

[98lee]

Heli-coil. Can be done by most automotive machine shops.

Should cost about 1/2 hour labor plus less than $5 parts.



:dance:dance:dance

[rab1957]

Google these two things, Time Sert and Back Tap. Have never used either of them, but they were recommended on another thread.

[rkildu]

Well it looks like back tap first and then if needed the timesert.

Thanks
Rod

[rkildu]

The Back-Tap wins! It cleaned up the threads very nicely. It took about 5 minutes per side.

Thanks
Rod