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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Mechanical - 4.8L, 5.3L, And 6.0L (4 Of 4)) >> Off-Vehicle Repair Instructions (3 Of 3) >> Engine Flywheel Installation

Engine Flywheel Installation

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Spacer & Crankshaft Rear
    GM642276Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • The flex plate does not use a locating pin for alignment, and will not initially seat against the crankshaft flange or spacer, if applicable, but will be pulled onto the crankshaft by the bolts. This procedure requires a 3 stage tightening process.
    • Certain applications, the 4.8L manual transmission and all 6.0L, require a spacer and longer bolts for proper flex plate position.
  1. Install the spacer, if applicable, onto the rear of the crankshaft.

    A longer flex plate bolt must be used on applications using a flex plate spacer.

    2. Fig 2: View Of Engine Flywheel & Bolt
    GM178458Courtesy of GENERAL MOTORS CORP.
  2. Install the automatic transmission flex plate to the crankshaft, if applicable.
    3. IMPORTANT: A longer bolt must be used on applications using a spacer.
  3. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the bolts.
    4. Fig 3: Identifying Flywheel Bolt Tightening Sequence
    GM63174Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the bolts.

    Tighten: 

    1. Tighten the bolts (1-6) a first pass in sequence to 20 N.m (15 lb ft).
    2. Tighten the bolts (1-6) a second pass in sequence to 50 N.m (37 lb ft).
    3. Tighten the bolts (1-6) a final pass in sequence to 100 N.m (74 lb ft).

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