Warped rotor?, Have now confirmed it's warped. |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Warped rotor?, Have now confirmed it's warped. |
john77 |
Aug 8 2015, 03:28 PM
Post
#1
|
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) |
stugray |
Aug 8 2015, 05:05 PM
Post
#2
|
Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
If the nut is not tighetened to full torque after the new bearings, it can ruin the new bearings.
Or if the car is moved on the new bearings prior to having the nut torqued.. |
porschetub |
Aug 8 2015, 06:17 PM
Post
#3
|
Advanced Member Group: Members Posts: 4,699 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
If the nut is not tighetened to full torque after the new bearings, it can ruin the new bearings. Or if the car is moved on the new bearings prior to having the nut torqued.. Exactly,had the same issue with my own car,scrapping noise went away when I torqued the nut up properly ,it wasn't really that loose maybe 180ft/lbs,took it up to torque (217 ft/lbs ?)and all was good. Also check the caliper is done up tight on the trailing arm. My car isn't running (IMG:style_emoticons/default/sad.gif) but I found this issue when pushing the engineless body (IMG:style_emoticons/default/smile.gif) . Another thing for the OP is check the surface between the rotor and the axle stub,have seen rust build-up cause run-out,my old Golf GTI had that issue,good luck. |
Lo-Fi Version | Time is now: 18th May 2024 - 08:14 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |