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Old 10-11-2017
rodbolt17 rodbolt17 is offline
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Join Date: Dec 2010
Location: KDH NC
Posts: 9,070
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typically the thread damage is done on removal. the AL tends to gall to the SS and its done.
that is also why unless absolutely nessasary I don't remove the plug.
I am good at heli coiling them.
I have a special made tap for the F115-150 motors.
grease the drill, grease the tap. flush with kerosene when done.
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