Normal Wear for Brake Pads
12-12-2012, 02:52 AM
#16
I'm calling B.S. and I certainly wouldn't have them perform service on my car, if their service department works on the same premise.
12-12-2012, 03:58 AM
#17
Race Director
I never claimed that the front brakes don't play a major role in braking. My point is with the rear or mid-engine layout and the subsequent weight the rear tires carry the rear brakes do more work than in other cars. If not then why 4 pistons?
12-12-2012, 09:13 AM
#18
Nordschleife Master
Brakes on the front take the majority of the braking forces in all cars,Porsche is no exception. It's the fronts that usually wear out sooner. Maybe he drove with the handbrake partially pulled... 
Just kiddin'...hope not...
But I'm with Macster on this one,check for overrevs and track usage,that's where you can kill the rear brakes quite easily if you drive with the traction control On.
Just kiddin'...hope not...But I'm with Macster on this one,check for overrevs and track usage,that's where you can kill the rear brakes quite easily if you drive with the traction control On.
12-23-2012, 04:11 AM
#19
Poseur
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Indirectly, yes. My 03 Turbo has over 100K miles on its original brakes.
Contrary to the belief of some the rear brakes of the rear (and mid-engined) Porsche do most certainly play a larger role in stopping the car than in other engine layouts.
This is because the majority of the weight in over the rear axle. Sure under braking there is weight transfer but not as much as with other cars.
This has to be in order for Porsches to deliver their outstanding braking performance. This doesn't arise from the fronts doing all the work while the rears do very little. These cars a very well balanced and this applies to the division for braking between the front and rear axles...
Contrary to the belief of some the rear brakes of the rear (and mid-engined) Porsche do most certainly play a larger role in stopping the car than in other engine layouts.
This is because the majority of the weight in over the rear axle. Sure under braking there is weight transfer but not as much as with other cars.
This has to be in order for Porsches to deliver their outstanding braking performance. This doesn't arise from the fronts doing all the work while the rears do very little. These cars a very well balanced and this applies to the division for braking between the front and rear axles...
12-23-2012, 05:00 PM
#20
Rennlist Member
It could be that the car was parked for long periods of time with the hand brake on and the pads frooze to the rotars. I have seen this happen before where the pads begins to fall apart or crack after you move car that have been parked for months and the rotars and pads rusted/froze together. This is why you should never store or park any car for long periods of time with the hand/emergency brake on!
Last edited by fskof; 12-23-2012 at 05:23 PM.
12-23-2012, 05:21 PM
#21
I am looking at possibly buying a CPO 2011 Carrera S with 12,000 miles, and I was told that as part of the CPO process, the rear brake pads had to be replaced, while the front pads were at 90%. Is this a normal wear pattern? Replacing pads after 12,000 miles in a normal car would seem very early, but I don't have any experience with a Porsche.
Firstly the brakes: My take is that the front brakes have already been replaced by the previous owner, and the rear brakes have been left alone, and traded to dealer.
The front brakes usually wear the quickest. This car could have been tracked a lot, or driven with vengeance.
The car's worth a lot of greenbacks so dig deep into the cars past before you spend your hard earned !
Neil
12-23-2012, 05:25 PM
#22
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How do you know the front pads (or the rears) are the original set after 12k?
If the car is tracked alot, it could be on it's 2nd set of fronts and 1st set of rears.
For example, I drive about 9k miles per year, with 1,500 miles occurring on the track. If that were my car, my pad situation at 12k would be exactly like what you could be seeing. New fronts while the original rears are reaching the end.
If the car is tracked alot, it could be on it's 2nd set of fronts and 1st set of rears.
For example, I drive about 9k miles per year, with 1,500 miles occurring on the track. If that were my car, my pad situation at 12k would be exactly like what you could be seeing. New fronts while the original rears are reaching the end.
12-24-2012, 02:31 AM
#23
it's not hard to detect if the car was tracked. look for those signs in the radiator, rocker panels for track rubber marks.
if the car was tracked, both F & R brakes would have been replaced together. it is possible that race pads were used in front and thus not documented.
either way, who knows. since this is a cpo, you should be covered if there is a problem with the car.
what we do know is that the service manager doesn't know what he is talking about or pulling a BS on you. there is no way that rears wear faster than front unless the car was in a drifting contest
normal brake wear should last 30-70k mi in my experience, depending how much freeway driving you do.
if the car was tracked, both F & R brakes would have been replaced together. it is possible that race pads were used in front and thus not documented.
either way, who knows. since this is a cpo, you should be covered if there is a problem with the car.
what we do know is that the service manager doesn't know what he is talking about or pulling a BS on you. there is no way that rears wear faster than front unless the car was in a drifting contest
normal brake wear should last 30-70k mi in my experience, depending how much freeway driving you do.
12-24-2012, 01:07 PM
#24
Rennlist Member
12-24-2012, 05:25 PM
#25
Tires maybe but not brakes. I have 29 K miles on both front and rear pads and rotors on my C4S and plenty of life left. Bad proportioning value maybe causing rears to wear funny but that large a wear variance front to rear is not normal. As for the service manager, they'll say just about anything to get you to stop asking questions. As any future problems you experience with the brakes are not covered by your warranty once you drive it off the lot future brake repairs/ replacement is on your dime. Only difference is next time they tell you it's needs rotors all around.
12-25-2012, 02:30 AM
#26
Poseur
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It could be that the car was parked for long periods of time with the hand brake on and the pads frooze to the rotars. I have seen this happen before where the pads begins to fall apart or crack after you move car that have been parked for months and the rotars and pads rusted/froze together. This is why you should never store or park any car for long periods of time with the hand/emergency brake on!
If you have the rear hand brake applied all you are doing is wearing out the inside of the drum and the parking brake shoes. The rotors are unaffected and thus aren't wearing at all.
