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Old 10-03-2004, 09:17 PM   #1
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Default Stripped Head Screw Holes

How do you fix the holes in the case where the 4 head screws go?I got a used motor and 2 are stripped.Please tell me I can fix them.
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Old 10-08-2004, 08:29 AM   #2
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1). New crankcase

2). Drill out and re tap to a slightly larger size
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Old 10-17-2004, 03:16 PM   #3
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Talking Helicoil

The best repair will be achieved with use of a Helicoil. It will be stronger than original. The drawback is; it requires a Helicoil tap as well as an insert. Inserts are cheap, taps are not. You should locate a reputable machine shop in your area and see if they can do it. Unless you are going to do a bunch, it is not cost effective to buy the Helicoil kit.
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Old 10-17-2004, 11:27 PM   #4
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If the tread is 3mm (if its a .12, provably), the best thing to do is to get a 6/32s tap and just tap them, you wont have to drill them out. Depemding on the screws you get, you might have to make the holes on the head bigger, but thats easy.
Steven Muller
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