heli-coil size question

[Trunkz]

ok got my head back from the shop (its purty)
got a problem tho, i have a stripped spark plug hole and a couple of stripped (crossthreaded) exhaust holes..
anyone know what size heli coils i need for these?
thanks
Mike

[Willy Mammoth]

If I remmember correctly the spark plug should be 14mm 1.25

You may want to concider a thread sert for the spark plug hole and getting a machine shop to take care of that so it done rite.


As far as the other, it is going to be 8mm 1.25 or 10mm 1.25

[reklund5]

x2 on the insert for the plugs.  Use a quality time-sert and have it done correctly, so you don't have to worry about it.

Ryan

[Duffil]

exhaust is 10x1.25