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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (3 Of 5)) >> On-Vehicle Repair Instructions (2 Of 2) >> Timing Chain and Sprockets Replacement (LC9/LMG/LY2/LY5) >> Removal Procedure

Removal Procedure

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    Fig 1: View Of Special Tool & Bolts
    GM1658136Courtesy of GENERAL MOTORS CORP.
  1. Remove the oil pump. Refer to Oil Pump, Screen and Crankshaft Oil Deflector Replacement (RPOs LC9/LMG/LY2/LY5) or Oil Pump, Screen and Crankshaft Oil Deflector Replacement (RPOs LY6/L76/L92) .
  2. Remove the starter motor. Refer to Starter Motor Replacement .
    3. NOTE: Refer to Fastener Notice .
    IMPORTANT: Ensure that the teeth of the J 42386-A  mesh with the teeth of the engine flywheel. See Special Tools .
  3. Install the J 42386-A  (1) and bolts. See Special Tools . Use one M10-1.5 x 120 mm and one M10-1.5 x 45 mm bolt for proper tool operation.

    Tighten:  Tighten the J 42386-A  bolts to 50 N. See Special Tools .m (37 lb ft).

    4. Fig 2: View Of Camshaft Sprocket, Timing Chain & Sprocket Bolt
    GM1658175Courtesy of GENERAL MOTORS CORP.
    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.
  4. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
  5. Remove the camshaft sprocket bolt (206).
  6. Remove the camshaft sprocket (205) and timing chain (208).
    7. Fig 3: View Of Timing Chain Tensioner & Bolts
    GM1658178Courtesy of GENERAL MOTORS CORP.
  7. Remove the timing chain tension bolts (231) and tensioner (232).
    8. Fig 4: View Of Crankshaft Sprocket Special Tools
    GM1658180Courtesy of GENERAL MOTORS CORP.
  8. Using the J 41816-2  (1), the J 41558  (2), bolts (3) and the J 8433  (4) in order to remove the crankshaft sprocket. See Special Tools .
    9. Fig 5: View Of Crankshaft Sprocket
    GM1658182Courtesy of GENERAL MOTORS CORP.
  9. Remove the crankshaft sprocket (207).
    10. Fig 6: View Of Crankshaft Key & Keyway
    GM156149Courtesy of GENERAL MOTORS CORP.
  10. Remove the crankshaft sprocket key, if required.
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