Finally, the spark plug time-serts arrived. Bout time.
This is what the threads looked like before, only about the lower half near the combustion chamber was still good, and even then...
There's a special tool, quite pricey but it works really well. The first part is a double tap, that starts by threading in what remains of the existing threads and steps up to the insert size.
Thread it all the way. Easier said than done, turn 1/4, back out, start over etc. until it goes all the way through. Then keep turning until the top cutting thread is 1/4" below the top of the hole.
Crappy pic of the top. It's cold here, fogs up the lens.
Second part is this cutting tool, goes over the tap so it's centered, and you cut a seat for the insert.
So it looks like this. Once the outer part is shiny you're done. It takes some doing since the cutting tool needs to cut quite a bit of the inside.
I believe the above already has the insert, but the important is the shiny outside.
The insert. Third step is to lubricate the third part of the tool because it needs to finish cutting the insert. The tool.
Start the insert on it. Doesn't go very far.
Then off you go.
Done.
I believe we're good now.
Never did this, it was a bit stressful but went well. I think. Only one way to find out I guess.
