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Red Sox to the Marrow
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brake calipers
I have a 81 911sc with 66k. In 2013 I had the brakes and the calipers done. Calipers were rebuilt. all the work was by a local guy been to for years. He recently retired. I got some electrical work done at another place (should have done myself). They noticed that the car rolled with difficulty and that the calipers were very hot and advised replacing the calipers. The rest of brakes are fine. I have put only about 1k miles after the original work. Bad rebuilt calipers or bad advise. Car is quite difficult to roll even in garage.
thanks for any thoughts. charles
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Proud member of Red Sox Nation a.k.a. "The Fellowship of the Miserable" '81SC Targa guards red |
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08-25-2016, 07:07 AM
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Tough to say... It would be very rare for all 4 to just all of a sudden go to hell. I would jack up the rear first and spin the wheels, if they drag push back the pistons, if you can, spin again making sure its not the parking brake. If it turns out to be the calipers, pull pads, find a thin piece of wood (Half the thickness of the pads or a tad less), place them where the old pads were and get in the car and pump the brakes. Then check to see if the pistons moved, this will tell you if one of the pistons has frozen or if the calipers need to be replaced/rebuilt. If they all moved, press them back in, repeat a few times to loosen them up some. Now, if you were able to press the pistons in before you took the pads out and it still drags, its the parking brake, adjust that. The same process hold true for the fronts, minus the parking brake.
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72 911 Although it is done at the moment, it will never be finished. |
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08-25-2016, 07:38 AM
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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,775
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The one thing I noticed after my calipers were rebuilt by PMB is that the car was very, very easy to roll. So much that I have to keep the brake on when sitting at a flat intersection or the car will creep. I can push the car out of the garage with a few fingers. That said, if you car is hard to roll, something is wrong.
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08-25-2016, 08:34 AM
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Been here a while
Join Date: Apr 2004
Location: East coast, west coast, typ. 35,000 ft
Posts: 2,437
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rubber parts become less pliable over time. Often brakes that don't fully release can be caused by rubber flex lines that have swollen internally. But other times in the rubber seals in the caliper that are no longer as elastic as they used to be, so the caliper doesn't retract after the pedal is pressed.
if you trust the new mechanic, there is nothing to worry about, but if you don't, well, that's a different story. brakes are pretty important 
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looking for 1972 911t motor XR584, S/N 6121622 |
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08-25-2016, 10:00 AM
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Tobluforu
