Thread: Generator
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iBoaterer[_2_] iBoaterer[_2_] is offline
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First recorded activity by BoatBanter: Sep 2011
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In article ,
says...

On Mon, 31 Dec 2012 15:23:44 -0600, Califbill
wrote:

The fix is not stronger than the base metal, but there
is more base metal involved. Therefore the fix is stronger.

===

Sounds right to me. The heli-coil is bigger than the plug so it has
more contact area (gripping surface) with the aluminum head. All
other things being equal, it should be stronger than the original.

No, that's not the problem, though. Think of it in this manner and it
will come to you: The THICKNESS of the base metal has not changed. That
thickness is what gives the metal it's tensile strength. You only weaken
the tensile strength by drilling a now larger diameter whole in it. The
cone of influence is what it is PURELY because of the base metal
thickness.
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