re tapping exhaust lug

the threads are fooked after to days drilling session so what size should i tap the lug to

considering it M8 now i was thinking m10 but that would only leave 3.5mm of material each side of the bolt, is that enough ?

OD is 17mm id would be about 10mm (m10)

or should i use a helicoil

[yorkie_chris]

Helicoil it M8.

ok so thats the best way to go ?

[yorkie_chris]

Yes

are they m8 x1.25 ? or x 1 dont have the bolt atm to look at

[yorkie_chris]

metric coarse

cheers again

[yorkie_chris]

But think about it you are putting helicoil in, it doesn't matter what you use, tap and coil it 5/16UNF if you want so long as you use a bolt to match

Originally Posted by yorkie_chris

But think about it you are putting helicoil in, it doesn't matter what you use, tap and coil it 5/16UNF if you want so long as you use a bolt to match

Yeh, would rather have the same bolt both sides if i can help.

will see what we have at college tomorrow

[yorkie_chris]

I know I said bolt above, but I prefer studs, stronger for same engagement and easier to remove if they are seized