how do you remove the rear calipers
 

I am trying to remove the rear calipers but my 10mm allen wrench won't fit behind the caliper. Is there a stubby one that I can get somewhere or another tool that I should be using. The alternative is the cut down my allen wrench.

Allen socket.

Sometimes you need to use a floor jack to raise the trailing arm to work on rear suspension stuff (though not sure in your particular case since you've not listed car, year, etc.).

Don

964 and 993 are different... which do you have?

For a 993, the best DIY info is at www.p-car.com

I have a 1991 964 C2. I am trying to replace the single piston calipers with dual piston ones.

I've had luck sticking the long end of the allen key in and using a 3/8"? x 12" pipe as a breaker bar (also a 3 lbs sledge to persuade it). Also need to use a heat gun to undo the loctite.

I've been soaking it with the liquid wrench and have partially stripped the allen. I have ordered a 10mm allen socket and will try using an impact driver. Thanks for the suggestions.

The extra long allen is a real requirement. Mine came loose after an overnight soak and use of a breaker bar. It was not easy.

Is this for a 964 or a 993? You don't need to remove anything to get to the bolt on the 964. You do need a 10" long 10mm allen socket. Snap-on sells them. This long socket goes through a hole in the trailing arm and voila, you're done! No need for a breaker bar either. Good luck.

If you are lucky;)

Guess I was lucky. 16 years and 100,000 miles without removing the calipers, they came off quite easily. The rears that is, the fronts is a different story :D