 5 lug brake rotor warped rear, Replacing brakes |
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| nditiz1 |
 Sep 10 2021, 10:08 PM
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#1
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Senior Member  Group: Members Posts: 1,188 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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So I'm throwing on some NOS calipers I got from Perry (thanks!) I'm trying to adjust them, but am finding when I turn the rotor to a certain point it is touching the outer pad. I have yet to touch the adjusters and I did tighten some washers down with the lugs to see if that was the issue. So is the rotor possibly warped or is the hub warped?
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| Optimusglen |
Sep 10 2021, 10:21 PM
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Senior Member Group: Members Posts: 909 Joined: 26-February 16 From: Minneapolis Member No.: 19,709 Region Association: Upper MidWest
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Rotors will all have a bit of runout. You find that high spot to adjust your clearance to. Keep in mind your axels need to be in and torqued down fully to the hub. And rotor screwed to the hub as well.
Oh, and one other thing I found out tonight, if you have porterfields you should peel off the thin metal plate. I'm also dealing with brakes, it seems my right rear outer adjuster is no longer communicating with the piston... Might be a trip killer. |
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| nditiz1 |
Sep 10 2021, 10:40 PM
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#3
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Senior Member Group: Members Posts: 1,188 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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Thanks for that info Glen. I definitely need to pull them out and peel it off.
I think pmb might have early rears, they didn't have any late which is why I had to buy new. Worst case scenario, I don't get my car together in time and ship you a rear (IMG:style_emoticons/default/biggrin.gif) At least one of us will make it in a teener. |
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| PatMc |
Sep 12 2021, 01:49 PM
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#4
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Member Group: Members Posts: 120 Joined: 27-June 21 From: Long Beach Member No.: 25,669 Region Association: None
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QUOTE(nditiz1 @ Sep 10 2021, 11:08 PM)  So I'm throwing on some NOS calipers I got from Perry (thanks!) I'm trying to adjust them, but am finding when I turn the rotor to a certain point it is touching the outer pad. I have yet to touch the adjusters and I did tighten some washers down with the lugs to see if that was the issue. So is the rotor possibly warped or is the hub warped? Mark the rotor friction surface at the high spot with a sharpie....then pull the rotor off the hub and walk it around a couple lugs and try it again. If the sharpie mark is still at the high spot, then all your runout is in the rotor...go get it machined. If the mark is no longer at the high spot, then you have an issue with the hub or debris between the hub/rotor mating surfaces. Brake rotors shouldn't have any runout. 0.002" or so is allowable, but more than that is a problem that needs to be solved. |
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| rhodyguy |
Sep 12 2021, 01:59 PM
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#5
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Cool trick.
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| Chris914n6 |
Sep 12 2021, 02:14 PM
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#6
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Jackstands are my life. Group: Members Posts: 3,320 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
I just went thru this last night. A tiny spec of debris stuck on the back side of the rotor. All good now after a thorough cleaning of it and the hub.
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