Isuzu Ascender 2003-05

Removal & Installation

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4.2L Engine



  1. Remove the air cleaner assembly.
  2.  
  3. Remove the drive belt.
  4.  
  5. Install a drain pan under the vehicle.
  6.  
  7. Disconnect the power steering pressure hose (1) from the power steering pump.
  8.  
  9. Disconnect the power steering cooler hose (2) from the power steering pump.

    Click image to see an enlarged view

    Fig. Power steering hose removal

  10.  
  11. Disconnect the wiring harness from the wiring loom on the power steering pump.
  12.  
  13. Remove the power steering pump mounting bolts.
  14.  
  15. Remove the power steering pump.

    Click image to see an enlarged view

    Fig. Steering pump removal

  16.  
  17. Remove the power steering pump pulley.
  18.  

To install:

  1. Install the power steering pump pulley.
  2.  
  3. Install the power steering pump.
  4.  
  5. Install the power steering pump mounting bolts.
  6.  
  7. Tighten the power steering pump mounting bolts to 18 ft. lbs. (25 Nm)
  8.  
  9. Install the power steering cooler hose (2) to the power steering pump.
  10.  
  11. Install the power steering pressure hose (1) to the power steering pump.

    Click image to see an enlarged view

    Fig. Steering hose installation

  12.  
  13. Tighten the power steering pressure hose to 18 ft. lbs. (25 Nm).
  14.  
  15. Remove the drain pan from under the vehicle.
  16.  
  17. Install the drive belt.
  18.  
  19. Install the air cleaner assembly.
  20.  
  21. Install fluid and bleed the power steering system.
  22.  
  23. Inspect the power steering system for leaks and the hoses for clearance away from the frame and other components.
  24.  

5.3L Engine



  1. Remove the drive belt.
  2.  
  3. Remove the Engine Control Module (ECM) from the ECM mounting bracket and move to the side.
  4.  
  5. Remove the power steering pressure hose (1) from power steering pump (2).
  6.  
  7. Remove the power steering pump return hose (3) from power steering pump (2).

    Click image to see an enlarged view

    Fig. Steering hose removal

  8.  
  9. Remove the power steering pump mounting bolts (3).
  10.  
  11. Remove the power steering pump (1).
  12.  
  13. Remove the power steering pump pulley.
  14.  
  15. If applicable, remove the power steering pump reservoir.
  16.  

To install:

  1. If applicable, install the power steering pump reservoir.
  2.  
  3. Install the power steering pump pulley.
  4.  
  5. Align the power steering pump (1) with mounting bolt holes on engine block (2).
  6.  
  7. Install the power steering pump mounting bolts (3).

    Click image to see an enlarged view

    Fig. Steering pump and mounting bolt installation

  8.  
  9. Tighten the bolts to 18 ft. lbs. (25 Nm).
  10.  
  11. Attach the power steering pump return hose (3) to power steering pump (2).
  12.  
  13. Attach the power steering pump pressure hose (1) to power steering pump (2).
  14.  
  15. Tighten the fittings to 18 ft. lbs. (25 Nm).
  16.  
  17. Install the ECM to the ECM mounting bracket. Refer to Engine Control Module Replacement .
  18.  
  19. Install the drive belt.
  20.  
  21. Install fluid and bleed the power steering system.
  22.  

 
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