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+--- Thread: 981 caliper bolts (/showthread.php?tid=3930)
981 caliper bolts - jimdcraig - 04-06-2015
I am going to replace the calipers on my base 981 boxster with the beautiful and functional red calipers from the "s". I have been reading a lot of info stating you should replace the caliper bolts when you remove the calipers. Apparently, the caliper mount threads can be a problem. any suggestions? thanks
RE: 981 caliper bolts - asamhall - 04-06-2015
You can get tarret caliper studs. They are made so the caliper will slide off each time without threading and rethreading caliper bolts.
RE: 981 caliper bolts - Phokaioglaukos - 04-07-2015
Porsche does recommend replacing caliper bolts whenever they are removed. In the DE/Racing world that is pretty much never done. Anti-seize and a good torque wrench and I reuse the bolts.
Studs are good, too, but remember they are also a wear item and need to be replaced at some point, as are caliper bolts. Not as often as Porsche recommends, though.
RE: 981 caliper bolts - jimdcraig - 04-07-2015
thanks for all the great advice. I think for the cost of a couple bolts, I am going to replace them. Car only has 4300 miles, want to keep it as new as possible. I will probably keep the old bolts for standby. Anybody know the torque spec for the caliper bolts? I was surprised at the 118 ft. lbs. for the wheel bolts...thanks again
RE: 981 caliper bolts - John from PA - 04-09-2015
I believe that torque is 63 ft-lb. I also support that you replace the bolts as Porsche recommends. There are two reasons, one being that when a bolt is highly torqued it stretches. The next time you torque it stretches again. Do that a few times and now the bolt can snap under the tensile stress of tightening. The 2nd reason is Porsche applies a coating to the threads, at least that is the case on some model replacements. The coating is a special anti seize since the bolt screws into an aluminum carrier plate.
By the way some newer bolts use a Torx, I think T55 while the originals may be a hex. Be prepared.
RE: 981 caliper bolts - jimdcraig - 04-10-2015
John, thanks for the advice, better safe than sorry for a couple of bucks....