Stripped plug hole
 

Back in June I posted up about Rocky behaving badly. After a lot of cleaning and debris chasing I'm at the reassembly point. It looks like the root cause was a stripped spark plug hole causing Rocky to spit the spark plug.

Has anyone had any luck using the Timesert sparkplug hole repair set?

I'd like to get a few more good rides in before winter... I have an "over the winter" maintenance list I will be working on which may now include a head...

I ordered the Time-Sert set last night. It should be here Thursday and I'll try it out Friday morning.

Never tried this while the head is on the cylinder. Seems like a high potential for metal shavings to end up in that cylinder.

On a side note, we just spent the weekend at the new track in Palmer. Just around the corner from you and a fantastic track!

Palmer MA?
I went to a summer camp near there as a kid

I plan on taking my time and doing it right. I'll hit the cylinder with the borescope to inspect it as best I can before reassembly. I didn't realize Palmer was completed yet. Ive been to Thompson once since they reopened and it came out nice.

+ 1 on the possibility of something going very wrong… :(
even one single tiny shaving (any size) will damage your cylinder wall.

It seems that removing one head and repairing the tread properly would be definitely cheaper that opening the engine due to a damaged cylinder IMHO…

I did this on a flat six with a very similar product around 1978 (on a 63 Corvair). I was just a kid, it was simple, easy to do, and a permanent fix. If a few aluminum chips ended up in the cylinder, they blew out when I started the car. Approach it carefully, go for it and don't look back. This is not a big deal.

I have to agree. I did it many years ago on my Lancia with a fiat motor. Just goober up the tap with grease so it collects all the chips. Start the car withe the spark plug to the repairedhole rmoved and all the crap blows out.