PT Cruiser L4-2.4L Turbo VIN G (2004)
Thickness variation in a rotor's braking surface can result in pedal pulsation, chatter and surge. This can also be caused by excessive runout in the
rotor or the hub. Rotor thickness variation measurements should be made in conjunction with measuring runout. Measure thickness of the brake rotor
at 12 equal points around the rotor braking surface with a micrometer at a radius approximately 25 mm (1 inch) from edge of rotor. If thickness
measurements vary beyond the specification, the rotor should be refaced or replaced.
ROTOR RUNOUT
On-vehicle rotor runout is the combination of the individual runout of the hub face and the runout of the rotor. (The hub and rotor runouts are
separable). To measure rotor runout on the vehicle, first remove the tire and wheel assembly. Reinstall the wheel mounting nuts on the studs,
tightening the rotor to the hub. Mount the Dial Indicator, Special Tool C-3339, with Mounting Adaptor, Special Tool SP-1910 on steering arm. The
dial indicator plunger should contact braking surface of rotor approximately 25 mm (1 inch) from edge of rotor. Check lateral runout on both sides of
the rotor, marking the low and high spots on both. Runout limits can be found in specifications.
