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Old 08-26-2009, 11:04 AM
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GearNut GearNut is offline
Motorized Bicycle Elite Member
Join Date: Aug 2009
Location: San Diego, Kaliforgnia
Posts: 5,106
Default Re: Stripped studs in exhaust mounting help!

90 degrees to the hole.... eek!
Make sure it is straight and true to the origional hole. Not crooked in any way. Go slow with a tap and always keep moderate pressure pushing it into the hole. Do not let the threads it is cutting "pull" it into the hole. That will give you a bad thread cut. Proper tap cutting oil is best, but even WD40 (ugh ) will work in a pinch. As previously said, always turn it in 1/4 to 1/2 turn and then turn it backwards a 1/2 turn to break the newly formed metal chip. If you do not do this the tap will become overwhelmed and snap off in the hole! It is not a fancy drill bit......
Good luck, and be patient!
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