Warped rotor?, Have now confirmed it's warped. |
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Warped rotor?, Have now confirmed it's warped. |
john77 |
Aug 8 2015, 03:28 PM
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#1
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Senior Member Group: Members Posts: 621 Joined: 21-February 14 From: Los Angeles Member No.: 17,027 Region Association: Southern California |
About a month ago something in the rear of my car started making this high-pitched squeaking, metal on metal noise when I was reversing. Not constantly, but like something turning was binding and releasing, binding and releasing. I only had the rear bearings replaced 6 months ago, so i hoped it wasn't that.
With the car up on stands and the rear wheels removed I've isolated it to the driver's side rear wheel. If I turn the rotor by hand it rotates freely and then gets really hard to rotate, and then gets easy, and so on. My first guess is that somehow I've warped the rotor. Does that sound right? I've never tracked the car, but I do ax it. Or could it be something else? I have the 5 lug conversion, so I believe they're off a 911. (IMG:http://www.914world.com/bbs2/uploads_offsite/i2.photobucket.com-17027-1439069310.1.jpg) |
mgp4591 |
Aug 8 2015, 07:07 PM
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#2
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914 Guru Group: Members Posts: 5,376 Joined: 1-August 12 From: Salt Lake City Ut Member No.: 14,748 Region Association: Intermountain Region |
I can see the wear pattern in your rotor from your picture- your rotor is warped. See the polished part on the outer face and then also the untouched part that is directly up from the rotor hat in your pic? That's the part that isn't making as much contact so it has less drag. If you've got a dial indicator (a very good idea anyway for checking not only rotor runout but suspension wear as well amongst other things) you'd see a difference as you spin the rotor. You may have a sticking piston or a piece of debris holding the pad against the rotor causing excess heat from constant contact causing your warpage problem. Another opinion- ask Mr. Shea, he's the expert.
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