Engine brace mount bolt pulled out the threads M12x1.5mm 20mm.Had to recreate a thread using a recoil or helicoil kit. Over size the hole to 31/64, tap it out with the provided tap and insert the coil. I used engine oil as lube.
More info here http://ayu452.blogspot.com/2011/08/thread-repair-maybe-heli-coil_24.html
I drilled the hole to about 23mm the depth i measured at 26mm. Gave myself 3mm buffer.
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