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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 655 (Engine Mechanical - 5.7L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Engine Flywheel Cleaning and Inspection

Engine Flywheel Cleaning and Inspection

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. 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.

  1. Clean the flywheel in solvent.
    CAUTION: Refer to SAFETY GLASSES CAUTION .
  2. Dry the flywheel with compressed air.
  3. Inspect the manual transmission flywheel for loose or improperly installed balance weights.

    A properly installed balance weight should be installed until flush or below flush with the face of the flywheel.

    Fig 1: Inspecting Manual Transmission Flywheel Weights
    G01970861Courtesy of GENERAL MOTORS CORP.
  4. Inspect the manual transmission flywheel for the following:
    • Pitted surface (1)
    • Grooved or scored surface (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 2 locating pins are installed into the flywheel and spaced 170 degrees apart to ensure proper orientation of the clutch pressure plate to the engine flywheel during assembly.

    Fig 2: Locating Manual Transmission Flywheel Damage
    G01970862Courtesy of GENERAL MOTORS CORP.
  5. Inspect the automatic transmission flywheel for the following:
    • Damaged ring gear teeth
    • Stress cracks around the flywheel-to-crankshaft bolt hole locations
    • Worn prop shaft drive hub splines
    • Loose prop shaft drive hub

    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 3: Inspecting Automatic Transmission Flywheel
    G01970863Courtesy of GENERAL MOTORS CORP.