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Best way to fix stripped threads

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Old 05-14-2005, 06:31 AM
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Default Best way to fix stripped threads

What is the best way to fix stripped threads in aluminum. Are there alternatives to helicoil?
Old 05-14-2005, 08:03 AM
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Well if you have enough material you can all ways drill and tap to the next size. If you dont want to use a helicoil, have the hole welded shut and and redrill and tap to orginal size. Other than that anything else is just a band aid.
Old 05-22-2005, 10:11 PM
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Drill and retap- delicately
Old 05-23-2005, 12:47 AM
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If the threads are not too bad, you might try to use a threaded tap with the same thread size and run it through the hole a few times.

Exactly which threads are stripped? Are they the spark plug holes, rocker arm threads, temperature guage, valve cover holes, or some other part?????
Old 05-23-2005, 08:09 PM
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Helicoils are designed to be stronger than the original threads - or so they say...
Old 05-23-2005, 09:51 PM
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Why your asking for alternatives to heli-coil? Is it because of the price ($35 to $90) ?
Old 05-24-2005, 01:54 AM
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1. Heli-coil.
2. Drill and tap to larger size.
3. Weld, drill and tap new hole.
4. Drill, tap to larger size, insert plug (with or without sealer/epoxy etc.) drill and tap plug to size.
5. Plug with exotic epoxy such as Belzona Hi-temp Molecular Metal (kit cost about $200). Don't even think about using JB Weld or a simular product.

Just cry once and take it to a machine shop and have it repaired the right way. Or cry every week if you try to fix it on the cheap. There ain't no short cuts or cheap ways to do it right!



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