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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 429 (Engine Mechanical - 1.8L (LNK)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain and Sprockets Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the accessory drive belt. Refer to Drive Belt Replacement .
    Fig 1: Removing Accessory Drive Belt
    G01546359Courtesy of GENERAL MOTORS CORP.
  2. Remove the generator from the engine. Refer to GENERATOR .
    CAUTION: Refer to BATTERY DISCONNECT CAUTION .
  3. Disconnect the negative battery cable.
  4. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  5. Install the engine support fixture. Refer to Engine Support Fixture .
  6. Loosen the A/C receiver pinch clamps.
  7. Lift the A/C receiver in order to access the right side engine mount.
  8. Remove the right side engine mount. Refer to Engine Mount Replacement .
  9. Remove the cylinder head cover. Refer to Cylinder Head Cover Replacement .
  10. Set the number one piston to the top dead center position.
    Fig 2: Setting Number One Piston
    G01546360Courtesy of GENERAL MOTORS CORP.
  11. Align the camshaft timing sprockets.
    Fig 3: Aligning Camshaft Timing Sprockets
    G01546361Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the power steering oil pressure switch connector.
  13. Raise and properly support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
  14. Remove the right side engine splash shield. Refer to SPLASH SHIELD REPLACEMENT - ENGINE - RIGHT .
  15. Remove the 2 power steering pump through bolts and the nuts (1).
  16. Remove the power steering pump from the mounting surface.

    Move the pump to the side.

    Fig 4: Removing Power Steering Pump
    G01546362Courtesy of GENERAL MOTORS CORP.
  17. Remove the crankshaft pulley retaining bolt using J 8614-01  .
  18. Remove the crankshaft pulley.
    Fig 5: Removing Crankshaft Pulley
    G01546363Courtesy of GENERAL MOTORS CORP.
  19. Remove the following components:
    • The crankshaft position sensor bolt (5)
    • The sensor
    Fig 6: Removing Crankshaft Position Sensor
    G01546364Courtesy of GENERAL MOTORS CORP.
  20. Lower the vehicle.
  21. Remove the following components from the mounting surface:
    • The drive belt tensioner bolt
    • The drive belt tensioner nut
    • The drive belt tensioner
  22. Remove the timing chain tensioner bolts (1, 2).
  23. Remove the timing chain tensioner.
    Fig 7: Removing Timing Chain Tensioner
    G01546365Courtesy of GENERAL MOTORS CORP.
  24. Remove the following fasteners:
    • The timing chain cover bolts (1-14)
    • The timing chain cover nut (15)
  25. Remove the timing chain cover.
    Fig 8: Removing Timing Chain Cover
    G01546366Courtesy of GENERAL MOTORS CORP.
  26. Remove the crankshaft sensor reluctor (1).
    Fig 9: Removing Crankshaft Sensor Reluctor
    G01546367Courtesy of GENERAL MOTORS CORP.
  27. Remove the following components:
    • The timing chain dampener bolt (1)
    • The timing chain dampener
    • The timing chain shoe bolts (2)
    • The timing chain shoe
    Fig 10: Removing Timing Chain Dampener & Shoe
    G01546368Courtesy of GENERAL MOTORS CORP.
  28. Remove the following components:
    • The crankshaft sprocket
    • The timing chain
    Fig 11: Removing Crankshaft Sprocket & Timing Chain
    G01546369Courtesy of GENERAL MOTORS CORP.
  29. Remove the four bolts from the front camshaft bearing cap.
  30. Remove the front camshaft bearing cap in order to access the oil passage to the CMP actuator.
  31. Ensure that the CMP actuator will not turn.
  32. Apply air pressure of approximately 100 kPa (14 psi) to the advance passage of the camshaft.
    Fig 12: Applying Air Pressure
    G01546370Courtesy of GENERAL MOTORS CORP.
  33. Turn the CMP actuator to the advanced angle side by hand.
  34. Rotate the actuator back and forth through the advanced positions to ensure 21 degrees of movement.
  35. Remove the air pressure and turn the CMP actuator back to the minimum advanced angle position to lock it.
  36. Replace the CMP actuator if the following conditions exist:
    • CMP actuator does not lock with air pressure removed.
    • CMP actuator does not unlock with air pressure applied.
    • CMP actuator does not rotate smoothly through the advanced positions.
    • CMP actuator does not rotate completely through the advance positions.
  37. Install the front camshaft bearing cap.
    NOTE: Refer to FASTENER NOTICE .
  38. Install the front camshaft bearing cap bolts.

    Tighten 

    Tighten the camshaft bearing cap bolts to 19 N.m (14 lb ft).