Stripped crank arm threads. what the **** do i do? the first 3 rows of thread are just beyond help, how do i fix it so the pedal goes in straight?
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Stripped crank threads
- Thread starter STPIZZAY
- Start date
1) Insert the pedal from the reverse to clear out the existing threads. Remove the pedal and then try to granny the pedal back in the correct way.
2) Take it to a bike shop or auto shop and see if they can stick a helicoil in there.
I recommend a new set of cranks. The bike shop won't try to fix it due to liabillity issues. An auto shop is a crap shoot. Next time finger tighten the pedal (any screw for that matter) to make sure its threaded correctly before wrenching it on. Good luck on the fix! Keep us posted.
2) Take it to a bike shop or auto shop and see if they can stick a helicoil in there.
I recommend a new set of cranks. The bike shop won't try to fix it due to liabillity issues. An auto shop is a crap shoot. Next time finger tighten the pedal (any screw for that matter) to make sure its threaded correctly before wrenching it on. Good luck on the fix! Keep us posted.
Alright, i just went out to my garage to give it a 2nd try and i managed to get it in there straight, its still ****ed and cross threaded but the pedal will screw in and is straight, the cranks were cheap aluminum things that came on an 04' specialized Allez and i wasnt really surprised that the thread wasnt very strong. you would have been surprised at how little effort it took to cross thread those.
its done now though. thanks for the help!>
its done now though. thanks for the help!>
I would not have put the pedal back into the bike.
Considering there were a few threads damaged, I would have taken it to a bike shop with 9/16" tap and cut new threads. The other trick would have been putting the tap in from the back of the crankarm so that the tap can be threaded in via the good threads before reaching the bad ones.
Now that you put the pedal back in, you might have cross threaded them all.
I am not even sure you should have put the pedal in through the backside. The pedals threads are not designed to recut threads in crankarm, so potentially you can ruined the damaged threads this way.
Considering there were a few threads damaged, I would have taken it to a bike shop with 9/16" tap and cut new threads. The other trick would have been putting the tap in from the back of the crankarm so that the tap can be threaded in via the good threads before reaching the bad ones.
Now that you put the pedal back in, you might have cross threaded them all.
I am not even sure you should have put the pedal in through the backside. The pedals threads are not designed to recut threads in crankarm, so potentially you can ruined the damaged threads this way.
