So the factory bolt is a 12mm 1.5 thread.

I was going to start with a 10mm 1.5 tap, do I still need to tap it again to move up to the 12mm or can I just use a 10mm bolt?

Tried with the extractors and as everyone has said no good.

thx for all your help.

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David Hendy
'97 Renntech E60RS
'97 GMC 2500 Sub' Diesel
'95 E300D
'88 300TE
'88 250TD
'84 L/Rover 109