Re: [DMCForum] rear brake rotors
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Re: [DMCForum] rear brake rotors



Damn, I feel sorry for you. I will not buy PJ Grady Brake rotors.



----- Original Message -----
From: Walter Coe <Whalt@xxxxxxx>
Date: Monday, March 3, 2003 0:47 am
Subject: [DMCForum] rear brake rotors

> <span><p><span><p>
> 
> 
> <tt>
> Re: [DMCForum] Avi is Back! - Walt isn't
> 
> 
> 
> Today I replaced my rear brake rotors (again) and accidentally let the
> 
> master cylinder run dry while bleeding.  So... I have to wait 
> until tomorrow
> 
> to buy master cylinder bleed kit before I can get the car back on 
> the road.
> 
> 
> 
> The issue with my brakes: one of the original rear rotors was 
> chipped, so I
> 
> had to replace it.  I got a new pair from PJ Grady, and they 
> sucked royally.
> 
> They had excessive runout which was so bad that if I had them cut 
> then they
> 
> would have been under spec.  And these were new rotors!  Interestingly
> 
> enough, I had no problems with brake pulsation.  The runout wasn't 
> thickness
> variation but a matter of not having the hub parallel with the 
> rotor.  As
> 
> the rotor wobbled, it pushed the brake pads apart.  This seemed to 
> not be a
> 
> problem at first.  Rob told me over the phone that this wouldn't 
> hurt the
> 
> calipers.  As the rotor turned, the wobble slapped the hand brake 
> pads and
> 
> caused one of them to fall off.  (I'm not the first to have this 
> problem
> with PJ Grady rotors, BTW.)  So I put on new pads and adjusted the 
> hand
> brake with lots of play to give room for the rotor to wobble.  Soon
> 
> afterwards the brakes feel glazed.  I take the wheels off; and 
> sure enough,
> 
> there is a bluish glossy layer all over the rotor.  So I sand it 
> off and was
> 
> fine for a while.  This was about a year ago.
> 
> 
> 
> Now fast forward to the present: the glaze is back and stopping 
> the car
> 
> requires much more pressure on the pedal.  So... I put another set 
> of rotors
> 
> on.  These are NOS from DMCJoe while he had a half-off sale about 
> 2 years
> 
> ago.  One rotor has no runout that I can tell.  The other has just 
> a speck
> 
> of runout -- not even worth mentioning.  Hopefully this will solve 
> my rotor
> 
> glazing problem.
> 
> 
> 
> And the moral of the story?  Always buy your parts from DeLorean 
> specific
> vendors and you won't have these kinds of issues.  Oh wait!  
> That's what I
> 
> did.  So much for that idea.  Well, I have one more beer in the 
> fridge.  :-)
> 
> 
> 
> Walt
> 
> 
> 
> </tt>
> 
> 
> 
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