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Helicoil Double-check


stormsedge

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Think I see the answer in an earlier thread...Helicoil M6 coarse for valve covers, right? k

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Ok, thanks...last couple of threads finally gave up. k

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Because the head is at an angle it's hard to judge when you have the drill / tap square on, next time I do one I will try to figure out some sort of mandrill e.g. something like a block of metal that has been drilled square on a bench drill. Failing that have something square attachced to one of the other screw holes as a guide.

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Ah ha! Good advice. Believe I could stack my old cylinder protectors as a guide. k

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Ah ha! Good advice. Believe I could stack my old cylinder protectors as a guide. k

 

That is a good idea if you don't have a drill guide. :thumbsup:

 

Although in this case, since you have an existing hole that you are just enlarging the bit is going to follow it straight so long as you don't force it. Tape your bit so you don't go too deep.

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