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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (Engine Mechanical - 4.8L, 5.3L, And 6.0L (2 Of 4)) >> On-Vehicle REPARI Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Camshaft Sprocket, Bolt & Timing Chain
    GM63263Courtesy of GENERAL MOTORS CORP.
  1. Remove the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement .
  2. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
    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.
  3. Remove the camshaft sprocket bolts.
  4. Remove the camshaft sprocket and timing chain.
    5. Fig 2: Identifying crankshaft sprocket
    GM1810828Courtesy of GENERAL MOTORS CORP.
  5. Use the J 8433  (4), the J 41816-2  (2), J 41478  (3) and the J 41558  (1) in order to remove the crankshaft sprocket. See Special Tools .
    6. Fig 3: View Of Crankshaft Sprocket
    GM156150Courtesy of GENERAL MOTORS CORP.
  6. Remove the crankshaft sprocket.
    7. Fig 4: View Of Crankshaft Key & Keyway
    GM156149Courtesy of GENERAL MOTORS CORP.
  7. Remove the crankshaft sprocket key, if required.
  8. Clean and inspect the timing chain and sprockets. Refer to Timing Chain and Sprockets Cleaning and Inspection .
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