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Join Date: Jul 2017
Posts: 3
Front brakes / Top caliper stud

All was going well on a front brake job on my 99 /996 911 Cab until the last stud on the driver side caliper. Not sure the cause but several threads galled making it very difficult to remove but I did get it out. I took the other stud and chased the threads and luckily it worked. I ordered another stud, but is it ok now that I'm down 3 threads out of 6 threads that engage (1/2 strength)? Not sure what the stress load on a caliper is under normal driving conditions (I don't track the car at all), will 1-1/2 studs do the job? Looked at a used lower suspension spindle hub knuckle (996.341.657.11) should I replace? What do you think, Bob?
Old 07-12-2017, 07:06 PM
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Join Date: Jan 2004
Location: Pittsford, NY
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You might want to look at a helicoil installation. You could also use an anti-sieze compound for threads to prevent future damage. Over tightening is also a problem that can cause threads to pull out.
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Old 07-13-2017, 06:39 AM
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I spoke with the local Porsche dealer (Wilmington) and he said 1) that the hold down bolts should be replaced every time you remove the caliper, so I purchase a set of (4) for the front. And 2) they should be torqued to 63 ft.lbs.. So I have replaced all (4) and they are all properly torqued. The one stud in question has more thread engagement than previously noted and I plan on replacing the steering knuckle when I change out the shocks in the future. Also pull the wheel in a month to check the torque. Hats off to Wilmington Porsche for the great information to a do it yourselfer like me!!
Old 07-15-2017, 05:05 AM
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