Engine Flywheel Cleaning and Inspection

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: In order to maintain the proper component balance, contact surface taper, and heat transfer, manual transmission flywheels are NOT to be machined.

Clean the flywheel in solvent.
Dry the flywheel with compressed air.
Inspect the manual transmission flywheel for the following:
- Pitted surfaces (1)
- Grooves or scoring (2)
- Rusted surface (3)
- Damaged ring gear teeth (4)
- Loose or improperly positioned ring gear
  The ring gear has an interference fit onto the flywheel and should be positioned completely against the flange of the flywheel.
- Missing, bent, or damaged pressure plate locating pins
  The two locating pins are installed into the flywheel and spaced 170 degrees apart.
  
  Fig 1: Engine Flywheel Inspection Locations
  Courtesy of GENERAL MOTORS CORP.
Inspect the automatic transmission flywheel for the following:
- Damaged ring gear teeth
- Stress cracks around the flywheel-to-crankshaft bolt hole locations
  IMPORTANT: Do not attempt to repair the welded areas that retain the ring gear to the flywheel plate. Install a new flywheel.
- Welded areas that retain the ring gear onto the flywheel for cracking
Fig 2: Engine Flywheel & Bolts
Courtesy of GENERAL MOTORS CORP.