Magnum V6-2.7L VIN T (2007)
On-vehicle rotor runout is the combination of the individual runout of the hub face and the runout of the brake rotor (hub runout can be measured
separately). To measure rotor runout on the vehicle:
1. Raise and support vehicle.
2. Remove tire and wheel assembly.
3. Install standard wheel mounting nuts, flat side to rotor, on all studs (2). Progressively tighten nuts to 150 Nm (110 ft. lbs.) torque.
4. Mount Dial Indicator (1), Special Tool C-3339A, with Wheel, Special Tool 25w, or equivalent, to knuckle. Position Dial Indicator Wheel to
contact rotor braking surface approximately ten millimeters from outer edge of rotor (3).
5. Slowly rotate brake rotor checking lateral runout, marking the low and high spots. Record these measurements.
6. Check and record runout of opposite side of rotor in same fashion, marking the low and high spots.
7. Compare runout measurement to specifications.
If runout is in excess of specifications, check the lateral runout of the hub face. Before removing the rotor from the hub, place a chalk mark across both
the rotor (1) and the one wheel stud (2) closest to where the high runout measurement was taken. This way, the original mounting spot of the rotor on the
hub is indexed.
8. Remove the rotor from the hub.
NOTE: Before measuring hub runout, clean the hub face surface with an appropriate cleaner. This provides a clean surface to get an
accurate indicator reading.
9. Mount Dial Indicator (2), Special Tool C-3339A, to the knuckle. Position Dial Indicator stem so it contacts hub face (1) near outer diameter. Care
must be taken to position stem outside of stud circle, but inside of chamfer on the hub rim.
10. Slowly rotate hub measuring runout. Hub runout should not exceed 0.01 mm (0.0004 inch). If runout exceeds this specification, the hub must be
replaced.
