Warped rotors b/c of emergency brake??
07-22-2003, 12:47 PM
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Warped rotors b/c of emergency brake??
Hey fellow Z drivers!
My buddy told me after I got my car that it's better to leave your car in gear and not use your emergency brake if you've been using your brakes.
He said that the pressure applied to the rotors from the emergency brake will warp them eventually because they are so hot, hot metal contracts, expands, etc. I'm sure you all know the rest...
Is this true?? Is it okay to leave your car in gear on a steep hill w/o the emergency brake?
Peace!
My buddy told me after I got my car that it's better to leave your car in gear and not use your emergency brake if you've been using your brakes.
He said that the pressure applied to the rotors from the emergency brake will warp them eventually because they are so hot, hot metal contracts, expands, etc. I'm sure you all know the rest...
Is this true?? Is it okay to leave your car in gear on a steep hill w/o the emergency brake?
Peace!
07-22-2003, 01:13 PM
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If you get your brakes really really hot, yes.
When at the track the other day, they told us not to use our emergency brakes for this exact reason: cracked pads and/or warped rotors. The rotors need to cool off a bit first.
Incidentally, they will cool faster driving around (because they can circulate air) than they will sitting.
When at the track the other day, they told us not to use our emergency brakes for this exact reason: cracked pads and/or warped rotors. The rotors need to cool off a bit first.
Incidentally, they will cool faster driving around (because they can circulate air) than they will sitting.
07-22-2003, 04:08 PM
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Usually it's not the rotors warping that causes a problem, but rather it's deposits left on the rotor by the pads. When the pads and rotors are really hot, they can transfer material between the two, and if you stop and leave the parking brake on, there will be a buildup of material in that area. The next time you use the brakes you can feel a bit of a pulsing as if the rotors were warped. Stoptech has a pretty interesting white paper about the phenomenon on their website.
Of course, since the Z uses that separate drum, it shouldn't be a problem.
Also, you have to have the brakes really, really, hot for the problem to occur. Normal driving will not cause the problem.
One thing is for sure, if you are parking on hills do not rely on the E-brake to hold the car. Be sure to curb the wheels and leave the car in gear to prevent a runaway vehicle.
-D'oh!
Of course, since the Z uses that separate drum, it shouldn't be a problem.
Also, you have to have the brakes really, really, hot for the problem to occur. Normal driving will not cause the problem.
One thing is for sure, if you are parking on hills do not rely on the E-brake to hold the car. Be sure to curb the wheels and leave the car in gear to prevent a runaway vehicle.
-D'oh!
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