07-09-2016, 12:01 AM
First some specs. Front wheel runout is 0.020mm (.008in) both radial and axial.
Front disc thickness is 4.5mm +- 0.1mm (0.18 +-0.004in). Service limit 3.5mm (0.14in).
The book says to replace the disk if it is below specs on thickness.
If warped, it says to check the wheel bearings for excessive play and replace disk if bearings are normal.
Me personally--I'd put a dial indicator on the wheel and the disk and check for runout, check the wheel bearings, then replace the disk(s). They are pretty thin. Having said that, slightly resurfacing them might be ok. Hopefully someone more knowledgeable about this will chime in.
My car disks are pretty thin, and the forum for that said resurfacing doesn't work and they will warp right back, but the dealer said it does work and they have been good for a year with pulsing gone.
I also read, maybe on the forum here, that material transfer from the pads will cause pulsing. You might want to get some Scotchbrite and clean up the rotors and see if that fixes it.
Front disc thickness is 4.5mm +- 0.1mm (0.18 +-0.004in). Service limit 3.5mm (0.14in).
The book says to replace the disk if it is below specs on thickness.
If warped, it says to check the wheel bearings for excessive play and replace disk if bearings are normal.
Me personally--I'd put a dial indicator on the wheel and the disk and check for runout, check the wheel bearings, then replace the disk(s). They are pretty thin. Having said that, slightly resurfacing them might be ok. Hopefully someone more knowledgeable about this will chime in.
My car disks are pretty thin, and the forum for that said resurfacing doesn't work and they will warp right back, but the dealer said it does work and they have been good for a year with pulsing gone.
I also read, maybe on the forum here, that material transfer from the pads will cause pulsing. You might want to get some Scotchbrite and clean up the rotors and see if that fixes it.