Should I replace brake pads and rotor at the same time?
#1
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Should I replace brake pads and rotor at the same time?
So I just replaced my front rotors but left the old brake pads because it looked like they still have some life to them.
Should I also replace the brake pads too?
My fear is that the grooves on the old pads will transfer over to the new rotors, is a legitimate worry?
Should I also replace the brake pads too?
My fear is that the grooves on the old pads will transfer over to the new rotors, is a legitimate worry?
#5
Lexus Fanatic
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That might be about every other pad change.
It might not be.
One has literally nothing to do with the other besides a bit of overlapping labor.
If the rotor isn't below spec, and doesn't have deep grooving, just replace the pads, bed properly, and go.
#6
Rotors should be cut/turned when replacing pads but only replaced when below spec which like previously posted is about every other pad replacement on the front, rarely on the back.
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#8
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No they shouldn't... unless there's something otherwise wrong with them all that does is waste good rotor metal and get you closer to falling below minimum spec.
"rotors should always be cut" is something a shop tells you to sell you work you don't need.
Even GM has gotten over trying to screw owners out of rotor life with unneeded machining...In technical bulletin #00-05-22-002 to its dealers, GM says, "Brake rotors should only be turned when one of the following rotor surface conditions exist: severe scoring with depth in excess of 1.5 mm or 0.060 inch, pulsation from excessive lateral runout of more than .080 mm or .003 inch, thickness variation in excess of 0.025 mm or 0.001 inch, or excessive corrosion on rotor braking surfaces."
In other words, GM frowns on rotor resurfacing during what it calls "normal" pad replacement.
Last edited by Kurtz; 06-30-11 at 11:06 AM.
#9
Everyone being told they need to turn their rotors needs to watch this video. It completely debunks the theory of turned rotors being as good or better than rotors that have not been turned.
#11
Well especially with the is350 your rotors develop huge lips that will cause noise and abnormal wear on the new pads, these lips are worse than what gm calls scoring or grooves, all about preference at the end of the day like anything else I suppose.
#12
Hogwash. The lip does nothing of the sort - this is one of the biggest myths about rotors I've ever heard. Would you like to see the pics of the rotors on my IS-F right now? Full 0.5mm lip on the edge. Pads make no noise. Neither did the track pads once they got warm. I swap pads from track to street and back all the time.
My Supra has nearly a full millimeter of lip on the front rotors. No noise at all.
Turning rotors is BAD - see the video I linked. There is nothing good from turning a rotor unless it is deeply scored, in which case you ought to just replace it.
My Supra has nearly a full millimeter of lip on the front rotors. No noise at all.
Turning rotors is BAD - see the video I linked. There is nothing good from turning a rotor unless it is deeply scored, in which case you ought to just replace it.
#14
Good, informational video. I personally would never turn my rotors, because A) I usually do all the (minor) work myself, and don't have the equipment to turn them, and B) nowadays rotors are relatively inexpensive and can just easily be replaced if need be.