 Warped rotor?, Have now confirmed it's warped. |
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| john77 |
 Aug 8 2015, 03:28 PM
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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 
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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) |
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| Spoke |
Aug 8 2015, 04:39 PM
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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Do you have a dial indicator gauge? This is very useful for measuring the run out of the rotor. With the wheel on, you would be able to tell if the bearing is bad. HF has one for $35.
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| john77 |
Aug 8 2015, 08:57 PM
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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
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QUOTE(Spoke @ Aug 8 2015, 03:39 PM)  Do you have a dial indicator gauge? This is very useful for measuring the run out of the rotor. With the wheel on, you would be able to tell if the bearing is bad. HF has one for $35. Thanks for all the suggestions. I have to pull the CV joints to replace the diff shaft seals (this is possible, right?) as my tranny is leaking like crazy since I changed the oil, so I guess this can become a 'while I'm in there' job. Spoke, I have no idea what this is, but I want one. What is it? Scratch that, I'll google it. |
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| Spoke |
Aug 8 2015, 09:17 PM
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(john77 @ Aug 8 2015, 10:57 PM) Spoke, I have no idea what this is, but I want one. What is it? Scratch that, I'll google it. I bought one like shown for my 1996 Audi A6 when I bent all 4 wheels on various potholes in PA and NJ. On one particular pothole on RT78 outside Newark not only did I bend a rim, it blew the tire out. It's basically a very sensitive ruler. Attach it to the vehicle and put the dial on the rotor or rim. Spin the wheel and watch the gauge. If no movement, the item is true. If the gauge jumps wildly then the item is out of round. Easy to see if your rotor is true. Found on my 914 front end with '73 911 front end the new rotor was not true. Had to file the attachment face of the rotor until I observed acceptable run out. |
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Posts in this topic
john77 Warped rotor? Aug 8 2015, 03:28 PM
porschetub
About a month ago something in the rear of my car... Aug 8 2015, 03:44 PM
john77
Take the caliper off and disconnent the axle and... Aug 8 2015, 04:16 PM porschetub
Take the caliper off and disconnent the axle an... Aug 8 2015, 05:05 PM PanelBilly and I have extra axles/cv s in the classifieds if ... Aug 8 2015, 04:19 PM stugray If the nut is not tighetened to full torque after ... Aug 8 2015, 05:05 PM porschetub
If the nut is not tighetened to full torque after... Aug 8 2015, 06:17 PM zambezi Are you running the 911 parking brake shoes. If s... Aug 8 2015, 05:38 PM Dave_Darling Pull the pads out and see if the noise continues. ... Aug 8 2015, 05:54 PM Krieger
Pull the pads out and see if the noise continues.... Aug 9 2015, 08:19 AM mgp4591 I can see the wear pattern in your rotor from your... Aug 8 2015, 07:07 PM john77 This afternoon, I removed the cv joints/axle (I wa... Aug 9 2015, 07:35 PM Dave_Darling The minimum thickness should be stamped on the edg... Aug 9 2015, 09:52 PM john77 My new dial indicator informs me the rotor is warp... Aug 26 2015, 10:11 PM stugray Stupid question, but why cant I see a E-brake leve... Aug 27 2015, 11:22 AM RoadGlue
Stupid question, but why cant I see a E-brake lev... Aug 27 2015, 12:23 PM john77
Stupid question, but why cant I see a E-brake lev... Aug 27 2015, 12:27 PM RoadGlue
Stupid question, but why cant I see a E-brake le... Aug 27 2015, 12:28 PM stugray
Stupid question, but why cant I see a E-brake le... Aug 27 2015, 01:14 PM john77
[quote name='john77' post='2229187' date='Aug 27 ... Aug 27 2015, 04:47 PM stugray
Thanks Stu. I think I'm going to go the whol... Aug 27 2015, 04:56 PM john77
Thanks Stu. I think I'm going to go the who... Aug 27 2015, 06:39 PM |
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