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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 681 (Engine Mechanical - 8.1L (On-Vehicle)) >> Repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Camshaft Sprocket, Bolt & Timing Chain
    GM470814Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Aligned the timing marks on the camshaft and crankshaft sprockets.
  3. Remove the camshaft sprocket bolts.
  4. Remove the camshaft sprocket and timing chain.
    5. Fig 2: Removing Crankshaft Sprocket Using J 42846
    GM639535Courtesy of GENERAL MOTORS CORP.
  5. Install the J 42846  (1) into the end of the crankshaft.
  6. Remove the crankshaft sprocket using a suitable three jaw puller.
  7. Clean and inspect the timing chain and sprockets. Refer to Timing Chain and Sprockets Cleaning and Inspection in Engine Mechanical - 8.1 L Unit Repair.
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