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Old Mar 01, 2010, 10:24 PM
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Spring, Texas
Joined Feb 2004
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You would drill and tap the glowplug hole oversized. The helicoil is a threaded coil of thread "wire" that screws into the oversized threaded hole. Check out this link:

http://www.emhart.com/products/helic...iex/design.asp
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