Partial rotor contact after Hawk install
Partial rotor contact after Hawk install
Hi all,
I installed some new front rotors and pads (Hawk HPS - all 4 corners) and during testing I noticed that the rears don't seem to be biting as much. For sure, on inspection, only half of the rotor is being braked on R/L sides! (see attached picture for the rusted area). I suspect the stock rear metal shims are somehow not compatible with the thickness of the
hawk's back plate. These pads don't come with a fibre shim glued onto the back like the OEM pad .........hmmm.
The fronts seem ok, so I am going to remove the stock shims in the rear and see what happens.
I will report back..
Jemm
I installed some new front rotors and pads (Hawk HPS - all 4 corners) and during testing I noticed that the rears don't seem to be biting as much. For sure, on inspection, only half of the rotor is being braked on R/L sides! (see attached picture for the rusted area). I suspect the stock rear metal shims are somehow not compatible with the thickness of the
hawk's back plate. These pads don't come with a fibre shim glued onto the back like the OEM pad .........hmmm.
The fronts seem ok, so I am going to remove the stock shims in the rear and see what happens.
I will report back..
Jemm
Last edited by jemm; Sep 17, 2006 at 05:52 AM.
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Joined: Aug 2006
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From: Houston, TX
um it doesn't really appear so but can't tell from the pics much. Did you cut your rear rotors when you installed the new pads or just slap em on? because that could certainly be the culprit. I don't understand all the bs on this site about not cutting rotors.
Looks like you have a pretty good lip on the outter edge of the rotor. Did you just go drive for a bid or did you go out and bed the pads? Check the thickness of your rotor in various spots. from the outter edge to the inner.
Leave the shim on thats not your problem. The piston in the caliper will just move out that much more, you can run shimless, but its nice to have something sacrifical between your piston and pad. It also dampens noise.
Leave the shim on thats not your problem. The piston in the caliper will just move out that much more, you can run shimless, but its nice to have something sacrifical between your piston and pad. It also dampens noise.
yeah silly me, those rear rotors need to be re-surfaced. I have not had the time to bed them in as yet, as I have a bad case of the Flu. Will report back after the bed-in.........
Originally Posted by jemm
yeah silly me, those rear rotors need to be re-surfaced. I have not had the time to bed them in as yet, as I have a bad case of the Flu. Will report back after the bed-in.........
partial rotor contact
This can occur if the pads are dragging or hanging in the calipers. I would bet that the rusty rotors have abraded the pads and now the surface is no longer parallel to the backing plate. This is not a fault with the caliper. I would pull the rear brakes apart and see if the pads are able to slide freely in the caliper. As for how to fix the pads after this (uneven wear) that is another story.
