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So I've just spent all day overhauling the brakes on my R32. The reasons for this were excess pedal travel and a scuffing noise from one of the brakes.
I've had all the calipers off the car and cleaned out all the pistons under the seals etc. Discovered the scuffing was one rear pad being tight in the caliper. Freed that up, and bled the entire system through with brand new DOT 5.1 fluid. :smokin:
Trouble is I've still got lots of pedal travel before the brakes do much. I have to push the pedal about half way through its travel before the brakes start to bite.
The feeling for the first half of the movement is like when you put new pads in and the pedal moves loads as it takes up the slack in the system, (i.e. there is some resistance as if its moving fluid about, but its just that the pads aren't at the disks yet). This feeling is always there though, the brakes don't seem to take up this 'slack'.
Once you're through this travel the brakes work well enough, but with the position of the pedal when the brakes start to work you've got no chance of heel and toe braking due to the pedal positions.
Setup is stock calipers and hoses, with uprated pads and disks, and the ABS removed.
So do other people's R32 brakes, (with stock calipers), have loads of pedal movement, or do they start to bite as soon as you touch the pedal? I've got the service manual with the measurements in for reference which I'll check tomorrow, but wondered if they're all like this, or if anyone has had the same problem and managed to fix it.
The brakes on my S13 are loads better, biting really early and having plenty of power.
Sorry for the long post, wanted to mention everything I'd found in case it made a difference to the diagnosis.
I've had all the calipers off the car and cleaned out all the pistons under the seals etc. Discovered the scuffing was one rear pad being tight in the caliper. Freed that up, and bled the entire system through with brand new DOT 5.1 fluid. :smokin:
Trouble is I've still got lots of pedal travel before the brakes do much. I have to push the pedal about half way through its travel before the brakes start to bite.
The feeling for the first half of the movement is like when you put new pads in and the pedal moves loads as it takes up the slack in the system, (i.e. there is some resistance as if its moving fluid about, but its just that the pads aren't at the disks yet). This feeling is always there though, the brakes don't seem to take up this 'slack'.
Once you're through this travel the brakes work well enough, but with the position of the pedal when the brakes start to work you've got no chance of heel and toe braking due to the pedal positions.
So do other people's R32 brakes, (with stock calipers), have loads of pedal movement, or do they start to bite as soon as you touch the pedal? I've got the service manual with the measurements in for reference which I'll check tomorrow, but wondered if they're all like this, or if anyone has had the same problem and managed to fix it.
The brakes on my S13 are loads better, biting really early and having plenty of power.
Sorry for the long post, wanted to mention everything I'd found in case it made a difference to the diagnosis.