Changing rotors - Toyota FJ Cruiser Forum
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#1 (permalink) Old 08-07-2008, 09:56 AM
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Changing rotors

I was wondering everyones opinion on the subject of changing rotors every time you change pads. I have always put new rotors on at the same time mostly because for $25 dollars per rotor why not. I may be completely wrong but I have done many a brake job and I always thought this was the right way of doing it.

The rotors wear unevenly leaving grooves, putting new pads on old rotors means that the pads would only come into contact with the rotors at the high spots of the grooves until the pads were worn down. A friend of mine asked me to replace his brakes but he wont buy new rotors because his father told him it was not needed even though his brakes are so worn that they are grinding.

I just wanted some input from a different point of view.
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#2 (permalink) Old 08-07-2008, 10:38 AM
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Re: Changing rotors

I've always had my rotors 'turned-down' when the pads needed replacement. Being that my vehicles were usually leased that meant only one brake job per contract. A rule of thumb: if a rotor is 'turned-down' once for a brake job then it should be replaced at the next brake job. Only one 'turn-down' per rotor.

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#3 (permalink) Old 08-07-2008, 10:49 AM
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Re: Changing rotors

I've always got mine turned for the first 2 brake pad changes. after that they are usually too thin and need to be replaced but it depends on the type of vehicle and the thickness of the rotors originally. as for the FJ, I brought mine in for the brake noise TSB at around 30K and they replaced pads and rotors.

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#4 (permalink) Old 08-07-2008, 11:16 AM
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Re: Changing rotors

As the others have said; most people have the rotors turned, but there's a limit on how far you can go. Personally, I installed many, many pads/shoes and not turned or replaced rotors/drums.

On my DD, I would probably replace them as you have said. The last time I had a dealer do my brakes I watched as they took my rotors off and threw them in a big pile. I walked out and asked WTF are you doing with my parts. Dude said a truck comes by and picks them up every two weeks... So I say, then what are you going to put on my truck? He points to another rusty pile and says those have already been turned...

I had them replace my originals, left and never returned. From that point on, I purchased new ones myself and watched them being installed.. Ron

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I was wondering everyones opinion on the subject of changing rotors every time you change pads. I have always put new rotors on at the same time mostly because for $25 dollars per rotor why not. I may be completely wrong but I have done many a brake job and I always thought this was the right way of doing it.

The rotors wear unevenly leaving grooves, putting new pads on old rotors means that the pads would only come into contact with the rotors at the high spots of the grooves until the pads were worn down. A friend of mine asked me to replace his brakes but he wont buy new rotors because his father told him it was not needed even though his brakes are so worn that they are grinding.

I just wanted some input from a different point of view.

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#5 (permalink) Old 08-07-2008, 11:21 AM
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Re: Changing rotors

If your friend's brakes are worn to the point of grinding, it could be causing damage to the rotors. This has happened to me. You won't really know until you get in there. Have your friend buy all the components for a worst-case scenario and if the rotors turn out to be okay then you don't have to replace them. Just my $.02

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#6 (permalink) Old 08-07-2008, 11:23 AM
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Re: Changing rotors

My first brake job I am going to put on the TRD brake rotors and pads. I think it's real important to have good breaks that you can count on especially if you drive with a trailer or lots of city driving. Plus my most precious cargo rides in this rig everyday and thats my wife.
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#7 (permalink) Old 08-07-2008, 11:32 AM
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Re: Changing rotors

I replace my rotors. I have had rotors turned in the past that were poorly (machined uneavenly) done which resulted in a pulsing pedal.

New rotors are cheap peace of mind.

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#8 (permalink) Old 08-07-2008, 11:34 AM
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Re: Changing rotors

I agree... at least you know what you get that way.. Ron

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I replace my rotors. I have had rotors turned in the past that were poorly (machined uneavenly) done which resulted in a pulsing pedal.

New rotors are cheap peace of mind.

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#9 (permalink) Old 08-07-2008, 11:42 AM
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Re: Changing rotors

If they can be turned I have them turned, if not then I buy new ones.


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#10 (permalink) Old 08-07-2008, 11:42 AM
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Re: Changing rotors

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I agree... at least you know what you get that way.. Ron
That and most places do not put a high priority on re-work, it is usually a "
We'll get to it when we can or feel like it" job.

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