Rus
11-29-2006, 08:37 AM
Hello,
I have recently changed my front rotors and brake pads. The rotors are stock replacement Brembo and the pads are Raybestos Quiet Stop Ceramic. The total mileage on the setup is not more than 100 miles yet and I'm experiencing a noise and response I haven't encountered before. When the brakes are cold, stopping with moderate pedal pressure produces a thumping noise and an accompanying slight shudder from the front end. Once the brakes are warmed up, much stronger pressure is required to reproduce the noise. I've double checked my work and everything is properly torqued, lubed, cleaned, etc. The pad material is evenly distributed on the disk surface and I experience no pulsation in the steering wheel or brake pedal. Since the Raybestos QS pads do not officially require a break in, I only did a couple of moderately strong brake applications from about 40-10 mph before proceeding to use the car normally. After a bit of use I also performed several 60-30 mph braking sessions. The thump became immediately apparent after the last 60-30 session which leads me to believe that it probably isn't a warped rotor issue. The general sensation before the brakes warm up almost feels like there is a ridge or a spot where the pads suddenly catch. The rotors are not cracked, which was my first suspicion. Has anyone encountered this before? I've come across one post about a similar problem with this same rotor/pad combination, but no resolution was posted :(
Thanks in advance for all input!
I have recently changed my front rotors and brake pads. The rotors are stock replacement Brembo and the pads are Raybestos Quiet Stop Ceramic. The total mileage on the setup is not more than 100 miles yet and I'm experiencing a noise and response I haven't encountered before. When the brakes are cold, stopping with moderate pedal pressure produces a thumping noise and an accompanying slight shudder from the front end. Once the brakes are warmed up, much stronger pressure is required to reproduce the noise. I've double checked my work and everything is properly torqued, lubed, cleaned, etc. The pad material is evenly distributed on the disk surface and I experience no pulsation in the steering wheel or brake pedal. Since the Raybestos QS pads do not officially require a break in, I only did a couple of moderately strong brake applications from about 40-10 mph before proceeding to use the car normally. After a bit of use I also performed several 60-30 mph braking sessions. The thump became immediately apparent after the last 60-30 session which leads me to believe that it probably isn't a warped rotor issue. The general sensation before the brakes warm up almost feels like there is a ridge or a spot where the pads suddenly catch. The rotors are not cracked, which was my first suspicion. Has anyone encountered this before? I've come across one post about a similar problem with this same rotor/pad combination, but no resolution was posted :(
Thanks in advance for all input!