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Stripped valve cover threads, which helicoil tap?

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I'm trying to repair my stripped threads on the cam caps. I have the correct helicoil for a m7 x1 thread, but not the drill bit or tap. I figured out the drill bit size. But what tap do I use before the insert? Does it have to be helicoils one(that would be a great buttf$@$&@$)? I've got a full set of tap and dies.Thanks for any info.

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I wouldn't helicoil, just go next size up, there's more than enough material there and much safer. M8 x1 I had to do it on my original 05

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That would be much easier, id like to use the stock looking fasteners though. Il keep it in mind. Definitely barely snugging those from now on

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