ROTORS
ROTORS
Judder
Surface grooves
Protruding edge
Overheating
- Problem
- A judder occurs when brakes are applied
- Likely cause
-
- Uneven rotor wear due to caliper malfunction
- Uneven rotor thickness due to overheating
- Improper rotor installation
- Rotor surface partial rust
- Solutions
-
- Check rotor surface condition for any signs of deformation
- Check brake rotor for rust
- Check if brake rotor is properly installed
- Replace the rotor if necessary
- Problem
- Grooves on brake rotor surface
- Likely cause
-
- Sand or pebbles got caught between pad and rotor
- Solutions
-
- Machine the rotor surface if rotor thickness is sufficient
- Replace the rotor if necessary
- Problem
- Protruding edge on brake rotor surface
- Likely cause
-
- Brake rotor shims are not installed
- Brake pad backing plate got in contact with rotor surface due to pad wear
- Rotor is worn out
- Solutions
-
- Check if brake rotor shims are installed
- Check the pad wear
- Check the rotor wear
- Replace the rotor
- Problem
- Dark blue spots on the rotor surface, periodic judder
- Likely cause
-
- Heavy thermal loads caused by sticking caliper piston
- Heavy thermal loads caused by sticking caliper slide pin
- Rotor surface deformation caused by heavy thermal loads
- Solutions
-
- Replace the rotor
- Check for piston and slide pin sticking
