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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1584 (Engine Mechanical - 2.4L (Lat)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain, Sprockets, and/or Tensioner Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Upper Timing Chain Guide Bolts And Guide
    GM1578296Courtesy of GENERAL MOTORS CORP.
  1. Remove the #1 cylinder spark plug. Refer to Spark Plug Replacement .
  2. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the exhaust stroke.
  3. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
  4. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  5. Remove the upper timing chain guide bolts and guide.
    6. Fig 2: View Of Timing Chain Tensioner
    GM1578295Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed. If it is not, the timing chain will become cocked and it will be difficult to remove.
  6. Remove the timing chain tensioner.
    7. Fig 3: Camshaft Position Actuator
    GM1578298Courtesy of GENERAL MOTORS CORP.
  7. Install a 24 mm wrench on the hex on the exhaust camshaft in order to hold the camshaft.
  8. Remove and discard the exhaust camshaft actuator bolt (2).
  9. Remove the exhaust camshaft actuator (1) from the camshaft and timing chain.
    10. Fig 4: Identifying Timing Chain Tensioner Guide
    GM1578299Courtesy of GENERAL MOTORS CORP.
  10. Remove the timing chain tensioner guide bolt and guide.
    11. Fig 5: View Of Fixed Timing Chain Guide Access Plug
    GM412164Courtesy of GENERAL MOTORS CORP.
  11. Remove the fixed timing chain guide access plug.
    12. Fig 6: View Of Fixed Timing Chain Guide
    GM412165Courtesy of GENERAL MOTORS CORP.
  12. Remove the fixed timing chain guide bolts and guide.
    13. Fig 7: Identifying Timing Chain & Camshaft Position Actuator
    GM1578297Courtesy of GENERAL MOTORS CORP.
  13. Install a 24 mm wrench on the hex on the intake camshaft in order to hold the camshaft.
  14. Remove and discard the intake camshaft actuator bolt (2).
  15. Remove the intake camshaft actuator (3), and the timing chain through the top of the cylinder head.
    16. Fig 8: Identifying Timing Chain Crankshaft Sprocket
    GM1578300Courtesy of GENERAL MOTORS CORP.
  16. Remove the timing chain crankshaft sprocket.
    17. Fig 9: Identifying Balance Shaft Drive Chain Tensioner
    GM1578301Courtesy of GENERAL MOTORS CORP.
  17. If replacing the balance shaft timing chain and sprocket, perform the following steps. If not, proceed the step 10 in the installation procedure.
  18. Remove the balance shaft drive chain tensioner bolts and tensioner.
    19. Fig 10: Identifying Adjustable Balance Shaft Chain Guide
    GM1578303Courtesy of GENERAL MOTORS CORP.
  19. Remove the adjustable balance shaft chain guide bolt and guide.
    20. Fig 11: Identifying Small Balance Shaft Drive Chain Guide
    GM1578302Courtesy of GENERAL MOTORS CORP.
  20. Remove the small balance shaft drive chain guide bolts and guide.
    21. Fig 12: Identifying Upper Balance Shaft Drive Chain Guide
    GM1578304Courtesy of GENERAL MOTORS CORP.
  21. Remove the upper balance shaft drive chain guide bolts and guide.
    22. Fig 13: Identifying Balance Shaft Drive Chain
    GM1578305Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: It may ease removal of the balance shaft drive chain to get all the slack in the chain between the crankshaft and water pump sprockets.
  22. Remove the balance shaft drive chain (7).
  23. Remove the balance shaft drive sprocket.
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