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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 2.0L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain, Sprockets, and/or Tensioner Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  4. Lower the vehicle.
    5. Fig 1: Locating No. 1 Piston To 60 Degrees Before Top Dead Center
    GM951992Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: To rotate the camshaft, use a 24 mm open-end wrench on the camshaft flats. Camshaft should be rotated in a clockwise direction only, facing camshaft sprockets from the passenger side of the vehicle.
  5. Locate the No. 1 piston to approximately 60 degrees before top dead center (diamond shaped hole on intake camshaft sprocket at 12 o'clock position). Remove the spark plugs. This will ease the rotation effort.
    6. Fig 2: Identifying Timing Chain Tensioner
    GM412158Courtesy of GENERAL MOTORS CORP.
  6. Remove the timing chain tensioner.
    7. Fig 3: View Of Fixed Timing Chain Guide Access Plug
    GM412164Courtesy of GENERAL MOTORS CORP.
  7. Remove the fixed timing chain guide access plug.
    8. Fig 4: View Of Fixed Timing Chain Guide
    GM412165Courtesy of GENERAL MOTORS CORP.
  8. Remove the fixed timing chain guide.
    9. Fig 5: View Of Upper Timing Chain Guide
    GM758269Courtesy of GENERAL MOTORS CORP.
  9. Remove the upper timing chain guide.
    10. Fig 6: Using 24 mm Wrench To Align Camshaft
    GM412536Courtesy of GENERAL MOTORS CORP.
  10. Use a 24 mm wrench to hold the camshafts from turning.
    11. Fig 7: Identifying Exhaust Camshaft Sprocket
    GM412168Courtesy of GENERAL MOTORS CORP.
  11. Remove the exhaust camshaft sprocket bolt and discard.
  12. Remove the exhaust camshaft sprocket.
    13. Fig 8: View Of Timing Chain Tensioner Guide
    GM412160Courtesy of GENERAL MOTORS CORP.
  13. Remove the timing chain tensioner guide.
    14. Fig 9: View Of Intake Camshaft Sprocket And Chain
    GM412169Courtesy of GENERAL MOTORS CORP.
  14. Remove the intake camshaft sprocket bolt and discard.
  15. Remove the intake camshaft sprocket.
  16. Remove the timing chain through the top of the cylinder head.
    17. Fig 10: View Of Crankshaft Sprocket
    GM758277Courtesy of GENERAL MOTORS CORP.
  17. Remove the crankshaft sprocket.
    18. Fig 11: View Of Oil Nozzle & Bolt
    GM412200Courtesy of GENERAL MOTORS CORP.
  18. Remove the oil nozzle and bolt.
    19. Fig 12: Identifying Balance Shaft Drive Chain Tensioner
    GM412201Courtesy of GENERAL MOTORS CORP.
  19. Remove the balance shaft drive chain tensioner.
    20. Fig 13: View Of Adjustable Balance Shaft Chain Guide
    GM412413Courtesy of GENERAL MOTORS CORP.
  20. Remove the adjustable balance shaft chain guide.
    21. Fig 14: Exploded View Of Small Balance Shaft Drive Chain Guide
    GM412414Courtesy of GENERAL MOTORS CORP.
  21. Remove the small balance shaft drive chain guide.
    22. Fig 15: View Of Upper Balance Shaft Drive Chain Guide
    GM412415Courtesy of GENERAL MOTORS CORP.
  22. Remove the upper balance shaft drive chain guide.
    23. Fig 16: Identifying Upper Balance Shaft Drive Chain/Sprocket
    GM412417Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: It may ease removal of the balance shaft drive chain to get all of the slack in the chain between the crankshaft and water pump sprockets.
  23. Remove the balance shaft drive chain.
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