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I have a rocker arm in my '03 Century Custom that has stripped out the head. I tried to tap it and helicoil it but unfortunately the tap went sideways. I am thinking that I may be able to drill and tap it out to a larger size. My question is, can I tap this out to a larger size and use an m10 1.25 helicoil with an m8 1.25 helicoil. If not, is there a way for me to do this.

Pᴀᴜʟsᴛᴇʀ2
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D. Kilduff
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1 Answers1

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I don't know how you held the tap or drill for your first effort, but you should use a drill press and mount the head such that the boss you need to work on is perpendicular so that whatever insert you plan to fit goes in correctly this time.

Solar Mike
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