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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 203 (Engine Mechanical - 3.5L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
    2. Fig 1: Aligning The Dowel In The Camshaft With The Dowel Hole In The Camshaft Sprocket
    GM187021Courtesy of GENERAL MOTORS CORP.
  2. Rotate the crankshaft until the timing marks in the following locations are aligned:
    • The camshaft alignment pin (4).
    • The timing chain dampener (1) to the crankshaft sprocket (2).
    3. Fig 2: View Of Camshaft Sprocket Bolt
    GM190538Courtesy of GENERAL MOTORS CORP.
  3. Remove the camshaft sprocket bolt.
    4. Fig 3: View Of Camshaft Sprocket With Timing Chain
    GM190539Courtesy of GENERAL MOTORS CORP.
  4. Remove the camshaft sprocket with the timing chain.
    5. Fig 4: View Of Crankshaft Sprocket
    GM760405Courtesy of GENERAL MOTORS CORP.
  5. Remove the crankshaft sprocket.
    6. Fig 5: View Of Timing Chain Dampener & Bolts
    GM59271Courtesy of GENERAL MOTORS CORP.
  6. Remove the timing chain dampener bolts.
  7. Remove the timing chain dampener.
    8. Fig 6: Locating Camshaft Thrust Plate
    GM96021Courtesy of GENERAL MOTORS CORP.
  8. If necessary, remove the camshaft thrust plate bolts.
  9. Remove the camshaft thrust plate.
  10. Clean and inspect the timing chain and the gears. Refer to Timing Chain and Sprockets Cleaning and Inspection .
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