Quote:
Originally Posted by steve25
Don’t heat it !
Even if you where able to get it red hot you will change the tempering on that bolt and only make it more brittle ( hard) and more likely to snap.
If you do snap the bolt after making it harder then for sure drilling it out will be extremely hard to do!
If it where me I would remove the exh manifolds, but seeing as what that bolt looks like your going g to bd snapping some of those bolts also, and then that forces you to yank that head to get back to square one.
If you get the car to a shop with a mechanic that’s good with a torch, he can melt that bolt out and then a heli coil can be installed, which it looks like what would have to be done even if YOU had got the bolt out already.
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Im pretty sure those bolts are already harder than Chinese arithmetic just from years of heat cycles.. heating them now is not going to make a difference on the hardness. Heat and wax is what I would try first..