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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1019 (Engine Mechanical - 4.8L, 5.3L & 6.0L (Repair Instructions - 1 Of 3)) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Engine Flywheel Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • The flywheel 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 engine flywheel bolts. This procedure requires a three stage tightening process.
  • Certain applications (4.8 L manual transmissions or all 6.0 L) require a spacer and longer bolts for proper flywheel position.
  1. Install the spacer (if applicable) onto the rear of the crankshaft.
    2. Fig 1: View Of Spacer & Crankshaft Rear
    GM642276Courtesy of GENERAL MOTORS CORP.
  2. Install the manual transmission engine flywheel to the crankshaft, if applicable.
    3. Fig 2: View Of Engine Flywheel & Bolts (Manual Transmission)
    GM156166Courtesy of GENERAL MOTORS CORP.
  3. Install the automatic transmission engine flywheel to the crankshaft, if applicable.
    IMPORTANT: Longer flywheel bolts must be used on applications using a flywheel spacer.
    4. Fig 3: View Of Engine Flywheel & Bolt
    GM178458Courtesy of GENERAL MOTORS CORP.
  4. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the flywheel bolts.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the engine flywheel bolts.

    Tighten: 

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

    6. Fig 4: Identifying Flywheel Bolt Tightening Sequence
    GM63174Courtesy of GENERAL MOTORS CORP.
  6. Install the clutch, if equipped with a manual transmission. Refer to Clutch Assembly Replacement in Clutch.
  7. Install the automatic transmission, if equipped. Refer to Transmission Replacement (4.3L, 4.8L, 5.3L, and 6.0L Engines) or Transmission Replacement (5.3L Engine w/RPO HP2) in Automatic Transmission - 4L60-E or Transmission Replacement in Automatic Transmission - 4L80-E.
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