Bicycle Mechanics - @@#$#@ Stripped threads pulling drive side crank

Ok now how am I going to get this off. I was carefull and threaded it all the way in and instead of the crank comming off like it has any other time I have pulled a crank; I tore the threads right out. Non drive side came off like a charm. Now I am pissed. :mad:

Just wack it off with a hammer from the back side.

Ok now how am I going to get this off. I was carefull and threaded it all the way in and instead of the crank comming off like it has any other time I have pulled a crank; I tore the threads right out. Non drive side came off like a charm. Now I am pissed. :mad:
you can borrow a gear puller like this from an Auto zone or Checker type store. i think you could hook those "tangs" behind the crank and pull it off

http://shop.com.edgesuite.net/ccimg.shop.com/210000/210900/210963/products/17122829.jpg

A gear puller will not fit behind my crank arms,maybe it could fit behind yours?If so good luck.If not bang it with a hammer!!

what brand of crank was it? Does it show evidence of cross threading? Maybe they make a large enough Helicoil that you can install using a bottom tap. Check with a good machine shop.

Hammer and flat punch is the way to go. Use a large flat washer on the crank to spread out the force so the punch doesn't ding the inside of the crank (although its not readily visible) I've done this and it works.

Another method, which I haven't tried, is to use a large automotive ball joint separator.

Heat the arm and it should pop off with light hammering...it worked for me.

youre effed

See if you can borrow a pickle fork from an automobile repair guy. They are typically used for beating off ball joints.

I would just loosely put the crankarm bolt back on and ride it around a bit, it will work itself loose, and the bolt will keep it from falling off.

Someone makes a repair kit for that. I think it's Var, I should remember since we have it at the shop. It has an oversized tap and repalcement bolt cap that becomes an extractor. If you want to save the crank you should try to find a shop that has this tool.

The idea about heating the crank is a good one - just be careful. I'm not sure a hair dryer would be enough heat, although if you have nothing else you have nothing to lose by trying that. A heat gun with variable temp setting would work. Then a careful use of a soft-faced hammer, strategically placed (not just whacking away, as has been suggested).

Thanks for all of the suggestions. Crank is now off thanks to by LBS. I actually thought about trying an automotive puller or the ball joint fork but it was just as easy to take it to the LBS and see what they could do as it was to go to the Auto Parts Store and borrow their tools.

Just curious...what method did they use?