Daytona L4-135 2.2L SOHC (1984)
Brake Disc: Testing and Inspection
Brake Chatter Checks
The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered at high speed or if
pedal pumping is experienced at low speeds, the disc may have excessive thickness variation. To check for this condition, measure the disc at 12 points
with a micrometer at a radius approximately one inch from edge of disc. If thickness measurements vary by more than 0.0005 inch, the disc should be
replaced.
Excessive lateral runout of braking disc may cause a "knocking back" of the pistons, possibly creating increased pedal travel and vibration when brakes
are applied.
Before checking the runout, wheel bearings should be adjusted. The readjustment is very important and will be required at the completion of the test to
prevent bearing failure. Be sure to make the adjustment according to the recommendations given under Front Wheel Bearings, Adjust in the Chrysler
Front Wheel Drive or Rear Wheel Drive car chapters.
