Brake pads dragging HELP
Thread Starter
Drifting
Joined: May 2002
Posts: 1,274
Likes: 64
From: Prescott AZ Gilbert AZ
Brake pads dragging HELP
Friends car at racetrack today.
Experience racer, and darn good mechanic.
2008 Z06
New front pads, and new stock calipers. New pins.
New rotors
Complete brake flush, excluding Tech 2 cycling of abs
Had a fulll ABS bleed maybe 3 months ago, not related to current issues, just because friend was there with snap on too, that could cycle ABS>
First problem about a month ago, in a race the pedal suddenly went to the floor and no brakes.
Everything a bit old, so all new parts as above.
His first run today, pedal goes major spongy after a couple of laps... comes in and front brakes are cooking.
Pads are dragging.
Brake bleed, no help. Still dragging, as can't turn the rotor by hand - both front wheels.
Pulled the new pads, put in old 1/2 worn pads.
Still the same.
Put the old caliper back one with the old pads, still the same, after brakes have been applied, pistons not retracting into calipers.
Pedal goes 1/2 way to floor, spongy, but can pump it up where the 1/2 way point is firm -- of course rotor can't be turned by hand.
Had scanner on the car, no codes for anything.
So -- master cylinder ? ABS?
Engine not running, so not power booster.
Experience racer, and darn good mechanic.
2008 Z06
New front pads, and new stock calipers. New pins.
New rotors
Complete brake flush, excluding Tech 2 cycling of abs
Had a fulll ABS bleed maybe 3 months ago, not related to current issues, just because friend was there with snap on too, that could cycle ABS>
First problem about a month ago, in a race the pedal suddenly went to the floor and no brakes.
Everything a bit old, so all new parts as above.
His first run today, pedal goes major spongy after a couple of laps... comes in and front brakes are cooking.
Pads are dragging.
Brake bleed, no help. Still dragging, as can't turn the rotor by hand - both front wheels.
Pulled the new pads, put in old 1/2 worn pads.
Still the same.
Put the old caliper back one with the old pads, still the same, after brakes have been applied, pistons not retracting into calipers.
Pedal goes 1/2 way to floor, spongy, but can pump it up where the 1/2 way point is firm -- of course rotor can't be turned by hand.
Had scanner on the car, no codes for anything.
So -- master cylinder ? ABS?
Engine not running, so not power booster.
