Grooves in just one rotor?
07-25-2011, 06:54 PM
#1
Grooves in just one rotor? I noticed that on my 97 Formula, that my front-right rotor has 2 distinct grooves in it (almost like a vinyl record with a few tracks). The car has just over 30,000 miles, and never had any brake work done since new.
Has anyone experienced this before? What could have caused this? I don't have any brake squeal at the moment, and the brake pads still look like they have some decent life left.
Thinking about taking it in for a checkup anyway, but was curious if anyone else had this. Thanks!
Has anyone experienced this before? What could have caused this? I don't have any brake squeal at the moment, and the brake pads still look like they have some decent life left.
Thinking about taking it in for a checkup anyway, but was curious if anyone else had this. Thanks!
07-25-2011, 08:48 PM
#3
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I wouldn't worry about the grooves too much... If they aren't too deep, they have zero effect on your braking capability.
GM's high tech method of determining the severity of grooves:
"Place a dime in the groove, with Roosevelt's head toward the groove. If the dime goes into the groove beyond the top of his head, the groove exceeds 1.5 mm (0.060 in) and the rotor should be serviced. In Canada, if any portion of the letters of "Canada" are covered, the rotor should be serviced. If the groove is too narrow for the dime to be inserted, it is not a cause for concern."
GM's high tech method of determining the severity of grooves:
"Place a dime in the groove, with Roosevelt's head toward the groove. If the dime goes into the groove beyond the top of his head, the groove exceeds 1.5 mm (0.060 in) and the rotor should be serviced. In Canada, if any portion of the letters of "Canada" are covered, the rotor should be serviced. If the groove is too narrow for the dime to be inserted, it is not a cause for concern."
07-25-2011, 09:19 PM
#4
Here's a pic of the rotor. I did try to put the dime in the groove and it did not seem that deep. I feel it when I rub my finger through it, but not so much when I rub my nail through it.
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07-26-2011, 03:27 AM
#8
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Thats not a problem at all.. Looks like a bit of debris got under your pad.. If your really worried about it, you can pull the pad off, use some 80grit sand paper on a sanding block and lightly sand it a bit to get the debris out of it, then reinstall and go.
If its not squeaking or anything, then I just wouldnt worry about it.
If its not squeaking or anything, then I just wouldnt worry about it.
07-27-2011, 05:07 PM
#10
Took it in anyway, and it turns out that the REAR pads/rotors needed attention instead! And they had NO grooves...
They inspected the groove in the front rotor and saw absolutely no issue at all with it, and told me the rotor is still within acceptable limits.
They inspected the groove in the front rotor and saw absolutely no issue at all with it, and told me the rotor is still within acceptable limits.
