Front Disc Brake Rotor - Specification Change
File in Section: 5 - BrakesBulletin No.: 53-50-05
Date: May 1995
SERVICE MANUAL UPDATE
Subject:
Section 5B1 - Front Disc Brakes
Models:
1995-1/2 Buick Regal
1995-1/2 Chevrolet Lumina, Monte Carlo
1995-1/2 Oldsmobile Cutlass Supreme
1995-1/2 Pontiac Grand Prix
Built After VIN Breakpoints:
Model VIN Breakpoint Plant
Buick 2G4WB52M4S1446968
Chevrolet 2G1WL52M3S9224590 (Plant 1)
Chevrolet 2G1WL52M451142110 (Plant 2)
Oldsmobile 1G3WH52M7SD365979
Pontiac 1G2WJ52M7SF266835
The following Information is to be added to Section 5B1 of the Service Manual.
Dimensions
New rotor change and dimensions for 1995-1/2 vehicles. The new diameter is 284.5 mm (11.200") and the old diameter was 256.5 mm (10.098").
Rotor diameter (new) 284.5 mm (11.200")
Maximum Lateral Run-out 0.080 mm (0.003")
Maximum Transverse Run-out 0.013 mm (0.0005")
Maximum Scoring 1.52 mm (0.060")
Rotor Thickness (new) 26.4 mm (1.039")
Minimum Rotor Thickness (new) 24.7 (0.972")
Discard Thickness (new) 24.3 mm (0.956")
Minimum Wear Stock 0.38 mm (0.015")