Caliper Bolt - 986 Forum - The Community for Porsche Boxster & Cayman Owners

pompous · 04-11-2010, 02:42 PM

One side is done and doing the passenger front brake now. Of the two caliper bolts, the lower one comes out just fine (just like the others), but the upper one will rotate 2 or 3 times and then is stuck. I've tried penetrating oil and wrenching it a couple turns one direction and then back the other direction, but that's as far as it'll go. Anybody ever run into this or have any ideas?

Mike_Yi · 04-11-2010, 03:11 PM

Try tightening it again a bit, then loosen it again. Keep working it like that.

I've had trouble before with caliper bolts. I've always had luck with putting th eallen wrench in the bolt, then smacking it with a hammer until it loosens. A safer way to do it would be to put a pipe over the end of the wrench to get more torque. The first method is safer, but takes a while, and doesn't always work. The second method is tricky. It either works, or destroys the bolt.

ppbon · 04-11-2010, 03:25 PM

... put some anti-seize paste on the threads.
The braking components are subjected to continuous and high temperatures that can bind the bolts if left in there many years.
Happy Boxstering,
Pedro

pompous · 04-11-2010, 04:16 PM

I broke the head off!! $%$@

landrovered · 04-11-2010, 06:32 PM

I have always used blue loctite on caliper bolts, I had one fall out on me once, won't allow that to happen again. I would not personally use anti sieze on a caliper bolt but that is just me perhaps.

jmatta · 04-11-2010, 06:41 PM

I've always been taught not to re-use caliper bolts...once and they're done. The use of anti-seize not only makes removal easier, but lubricates the threads to get a proper torque setting...never dry.

ppbon · 04-12-2010, 05:56 AM

Quote:

Originally Posted by landrovered

I have always used blue loctite on caliper bolts, I had one fall out on me once, won't allow that to happen again. I would not personally use anti sieze on a caliper bolt but that is just me perhaps.

Your caliper bolt was loose because it was not torqued properly.
Most likely because the threads were dry!
A properly torqued bolt will stretch a bit giving the threads more area for friction, which is what holds it in place.

Happy Boxstering,
Pedro