Inspection Procedure

Fig 1: Inspecting Clutch Surface For Damage

Courtesy of GENERAL MOTORS CORP.

Visual Inspection of Clutch Disc

1. Inspect the worn or oily contamination on the clutch surface.
2. Inspect the damaged or weakened torsion spring.
3. Inspect for a warped or bent clutch disc. After inspection, replace the new clutch disc, if necessary.

Clutch Disc Inspection

1. Measure the rivet head depth from the clutch disc surface.
2. Replace the clutch disc if the measured value is below the limit.

   Specification:  The rivet head depth standard is 1.2 mm (0.047 in), limit is 0.5 mm (0.020 in).

Fig 2: Measuring Runout Using Dial Gage

Courtesy of GENERAL MOTORS CORP.

Clutch Disc Runout in Rotational Direction Inspection

1. Measure runout using the dial gage.
2. If runout exceeds the limit, replace the clutch disc.

   Specification:  The disc runout limit in rotational direction - periphery - is 0.7 mm (0.028 in).

Fig 3: Inspecting Pressure Plate Surface For Damage

Courtesy of GENERAL MOTORS CORP.

Visual Inspection of the Pressure Plate

1. Inspect for a worn diaphragm spring finger.
2. Inspect for a worn or cracked pressure plate surface.
3. Inspect for the polluted face by the oil. After inspection, replace the pressure plate if necessary.