ruined crankset?

pesky_jones

Basically, I tightened up the zee left hand crank arm clamp bolts without the spacer in, and pulled the thread out of one of the bolt holes in the crank arm.

Is it possible to A) "rethread" the hole. (cant remember the name of that right now)

or buy a single zee crank arm from shimano

I don't want to go to plan C

ej2320

I know it is possible to rethread it. I got into a mess with my pedals once and ruined the thread on the crank arm for the pedal. Took it to my LBS and they used some tool to rethread it. I don't know if they have the tool for that size however

cooldad

Helicoil is the word you are looking for.

baznav73

Buy an M6 helicoil kit and a torque wrench.

pesky_jones

Ok sounds good, do you know if the M6 helicoil kit will work on ZEE?

The Rookie

It's a kit that puts thread into anything where someone has ripped it out, so yes.

The 'spacer' (it's not a spacer) doesn't prevent you ripping the thread out by applying too much torque

cooldad

But fitting a helicoil is best left to a pro.

pesky_jones

Ok no worries I'm going to take it to the mechanic he's going to tap a new thread, I dont think that's the same as helicoil.

Monty Dog

If you've stripped the thread, there'll be nothing to re-tap, hence need for Helicoil. helicoil isn't difficult if you have the right tools - kits available on ebay for £15.

pesky_jones

Re-tap at a bigger bolt size - m7

nicklouse

and do not tighten the bolts up one at a time or you will just do the same again.

do them a little at a time to apply even pressure.