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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Engine Mechanical - 5.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Timing Chain and Sprockets Removal

Timing Chain and Sprockets Removal

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
  1. Remove the camshaft sprocket bolts.
  2. Remove the camshaft sprocket and timing chain.
    Fig 1: Removing Camshaft Sprocket And Timing Chain
    G02129384Courtesy of GENERAL MOTORS CORP.
  3. Use the J 8433-1  , the J 41816-2  , and the J 41558  in order to remove the crankshaft sprocket.
    Fig 2: Using Tools To Remove Crankshaft Sprocket
    G02129385Courtesy of GENERAL MOTORS CORP.
  4. Remove the crankshaft sprocket.
    Fig 3: Removing Crankshaft Sprocket
    G02129386Courtesy of GENERAL MOTORS CORP.
  5. Remove the crankshaft sprocket key, if required.
    Fig 4: Removing Crankshaft Sprocket Key
    G02129387Courtesy of GENERAL MOTORS CORP.