GM Corvette 1984-1996 Repair Guide

Power Steering Pump

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REMOVAL & INSTALLATION



VIN 8 Engines

See Figures 1 and 2

  1. Disconnect the negative battery cable and place a drain pan under the vehicle to catch fluid.
  2.  
  3. Remove the serpentine drive belt.
  4.  
  5. Remove the power steering pump pulley as follows:
    1. If equipped with an automatic transmission, remove the water pump damper.
    2.  
    3. Unfasten the bolts securing the power steering reservoir bracket to the drivetrain and front suspension frame.
    4.  
    5. Reposition the reservoir bracket with the reservoir and hoses for pulley clearance.
    6.  
    7. Remove the power steering pump pulley hub cap, then remove the pulley using a suitable removal tool.
    8.  

  6.  
  7. Disconnect and plug the power steering gear inlet hose from the pump. Disconnect and plug the reservoir hose from the power steering pump.
  8.  
  9. Unfasten the bolt securing the pump rear bracket to the rear brace.
  10.  
  11. Remove the engine mount bolt and power steering pump rear brace.
  12.  
  13. Remove the power steering pump mounting bolts.
  14.  
  15. Remove the power steering pump and rear bracket.
  16.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the power steering pump and related components-1990 shown, others similar

  1. If alternator/power steering pump bracket removal is necessary, perform the following:
    1. Remove the alternator assembly, as outlined in Engine Electrical of this repair guide.
    2.  
    3. Remove the AIR pump and bracket.
    4.  
    5. Remove the bolts securing the alternator/power steering pump bracket to the engine, then remove the bracket.
    6.  

  2.  

To install:
  1. If removed, install the alternator/power steering pump bracket as follows:
    1. Position the bracket to the engine and secure with the retaining bolts. Tighten the bolts to 24 ft. lbs. (33 Nm).
    2.  
    3. Install the AIR pump bracket and pump.
    4.  
    5. Install the alternator.
    6.  

  2.  
  3. Install the power steering pump, rear bracket and bolts to the alternator/power steering pump bracket.
  4.  
  5. Instlal the power steering pump rear brace and engine mount bolt.
  6.  
  7. Install the bolt holding the rear bracket to the rear brace.
  8.  
  9. Tighten the bolts to the following specifications:
    1. Power steering pump mounting bolts: 18 ft. lbs. (25 Nm)
    2.  
    3. Power steering pump rear bracket-to-rear brace bolt: 24 ft. lbs. (33 Nm)
    4.  
    5. Engine mount bolts: 41 ft. lbs. (56 Nm)
    6.  
    7. Power steering pump rear bracket-to-power steering pump bolt: 18 ft. lbs. (25 Nm)
    8.  

  10.  
  11. Connect the power steering reservoir hose and clamp to the power steering pump.
  12.  
  13. Attach the power steering gear inlet hose and tighten the fitting to 21 ft. lbs. (28 Nm).
  14.  
  15. Install the power steering pump pulley as follows:
    1. Install the pulley using a suitable installation tool such as J 25033-B or equivalent. The pulley must be installed onto the pump shaft to the specifications shown in the accompanying figure.
    2.  

  16.  



Click image to see an enlarged view

Fig. Fig. 2: Power steering pump pulley removal and installation

    1. Install the hub cap on the pulley.
    2.  
    3. Position the reservoir bracket with the reservoir and hoses.
    4.  
    5. Install the bolts retaining the reservoir assembly bracket to the drivetrain and front suspension frame. Tighten the bolts to 89 inch lbs. (10 Nm).
    6.  
    7. If equipped with an automatic transmission, install the water pump damper.
    8.  


  1. Install the serpentine drive belt.
  2.  
  3. Connect the negative battery cable, then properly fill and bleed the power steering system.
  4.  

VIN P and 5 Engines

See Figure 3

  1. Disconnect the negative battery cable and place a drain pan under the vehicle to catch fluid.
  2.  
  3. Remove the air intake duct, then remove the serpentine drive belt.
  4.  
  5. Remove the steering pump pulley hub cap, then remove the pulley using J-25034-B or an equivalent puller tool.
  6.  
  7. For 1993-96 vehicles, remove the serpentine drive belt idler pulley.
  8.  
  9. Disconnect the gear inlet hose assembly from the pump. For 1993-96 vehicles, remove the pump inlet pipe mounting bolts, then disconnect the pipe assembly from the pump.
  10.  
  11. For 1992 vehicles. disconnect the reservoir hose and clamp from the pump.
  12.  
  13. Remove the power steering pump mounting bolts.
  14.  
  15. Remove the power steering pump and front bracket.
  16.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of the power steering pump and brackets-5.7L (VIN P & 5) engines

To install:
  1. Install the power steering pump and front bracket with the mounting bolts. Tighten the bolts to 18 ft. lbs. (25 Nm).
  2.  
  3. For 1992 vehicles, connect the power steering pump reservoir hose and clamp to the pump. Tighten the clamp to 22 inch lbs. (2.5 Nm).
  4.  
  5. For 1993-96 vehicles, install the pump inlet pipe to the pump, then install the mounting bolts and tighten to 24 ft. lbs. (33 Nm).
  6.  
  7. Connect the power steering gear inlet hose assembly to the power steering pump and tighten the fitting to 21 ft. lbs. (28 Nm).
  8.  
  9. For 1993-96 vehicles, install the serpentine drive belt idler pulley.
  10.  
  11. Using J-25033-B, or an equivalent installation tool, install the power steering pump pulley so the front of the pulley hub is flush with the front of the pump shaft.
  12.  
  13. Install the hub cap to the pulley.
  14.  
  15. Install the serpentine drive belt, then install the intake air duct.
  16.  
  17. Connect the negative battery cable and remove the drain pan.
  18.  
  19. Refill the power steering reservoir and properly bleed the system.
  20.  

VIN J Engines

See Figures 4 and 5

  1. Disconnect the negative battery cable and remove the air intake duct.
  2.  
  3. Drain the engine cooling system into a suitable container.
  4.  
  5. Drain and appropriately discard the power steering fluid.
  6.  
  7. Remove the serpentine drive belt.
  8.  
  9. Remove the left coolant outlet cover and hose.
  10.  
  11. Disconnect the vacuum hose retainer from the pump reservoir, then remove the vacuum hose(s) and set aside.
  12.  
  13. For 1990-92 vehicles:
    1. Remove the power steering pump bracket-to-cylinder head bolts.
    2.  
    3. Remove the pump bracket to air conditioning compressor bolt.
    4.  
    5. Remove the cooler assembly outlet hose from the reservoir.
    6.  
    7. Disconnect the power steering gear inlet pipe from the power steering pump, then remove the power steering pump assembly from the vehicle.
    8.  
    9. As necessary, remove the pump pulley using tool J-25034-B or equivalent puller. Remove the reservoir hose from the pump. Remove the power steering pump-to-mounting bracket bolts and remove the pump and/or reservoir from the bracket.
    10.  

  14.  
  15. For 1993-96 vehicles:
    1. Remove the bolts retaining the compressor hose clip to the crossmember.
    2.  
    3. Remove the pulley hub cap and separate the pulley from the pump using J-25034-B or an equivalent puller.
    4.  
    5. Remove the crankcase vent inlet pipe from the power steering pump bracket.
    6.  
    7. Remove the crankcase vent inlet hose from the throttle body extension.
    8.  
    9. Remove the compressor-to-power steering pump bracket bolt.
    10.  
    11. Remove the gear inlet pipe from the pump, then remove the outlet hose from the cooler assembly.
    12.  
    13. Remove the power steering pump bracket-to-cylinder head bolts, then remove the pump from the vehicle.
    14.  
    15. As necessary, remove the fluid reservoir hose from the assembly, remove the pump-to-mounting bracket bolts and remove the pump and/or reservoir from the mounting bracket.
    16.  

  16.  



Click image to see an enlarged view

Fig. Fig. 4: Power steering pump, reservoir and mounting bracket-5.7L (VIN J) engine



Click image to see an enlarged view

Fig. Fig. 5: Installation of the power steering pump pulley-5.7L (VIN J) engine

To install:
  1. If replacing the pump, do not use a pump with the letter R on the back of the pump housing.
  2.  
  3. If removed, install the reservoir and/or pump to the bracket. Apply Loctite® 565 or equivalent, to the pump-to-bracket mounting bolts and install. Tighten the bolts to 19 ft. lbs. (26 Nm).
  4.  
  5. If removed, connect the pump reservoir hose to the pump and tighten the clamp screw to 22 inch lbs. (2.5 Nm).
  6.  
  7. For 1993-96 vehicles:
    1. Install the pump assembly to the vehicle. Coat the bolt threads with Loctite® 565 or equivalent, then install the bolts and tighten 19 ft. lbs. (26 Nm).
    2.  
    3. Connect the outlet hose to the cooler assembly. Tighten the clamp screw to 22 inch lbs. (2.5 Nm).
    4.  
    5. Connect the power steering gear inlet pipe to the pump, then tighten the fitting to 21 ft. lbs. (28 Nm).
    6.  
    7. Install the compressor-to-power steering pump bracket bolt and tighten to 19 ft. lbs. (26 Nm).
    8.  
    9. Install the crankcase vent inlet hose to the throttle body extension and to the power steering pump bracket.
    10.  
    11. Install the pump pulley using J-25033-B or equivalent installation tool, then install the hub cap.
    12.  
    13. Install the bolt retaining the compressor hose clip to the crossmember.
    14.  

  8.  
  9. For 1990-92 vehicles:
    1. If removed, install the power steering pump pulley using a suitable installation tool.
    2.  
    3. Position the pump assembly onto the engine.
    4.  
    5. Connect the gear inlet pipe to the pump and tighten the fitting to 21 ft. lbs. (28 Nm).
    6.  
    7. Install the cooler assembly outlet hose to the reservoir and tighten the hose clamp screw to 22 inch lbs. (2.5 Nm).
    8.  
    9. Install the A/C compressor to power steering pump bracket bolt and tighten to 19 ft. lbs. (26 Nm).
    10.  
    11. Apply a coat of Loctite® 565 to the pump bracket-to-cylinder head bolts, install and tighten the bolts to 19 ft. lbs. (26 Nm).
    12.  

  10.  
  11. Install the vacuum hose(s) and connect the retainer to the power steering pump reservoir. Tighten the screws to 13 inch lbs. (1.5 Nm).
  12.  
  13. Install the left coolant outlet cover and hose.
  14.  
  15. Install the serpentine drive belt.
  16.  
  17. Install the air intake duct and connect the negative battery cable.
  18.  
  19. Refill the power steering reservoir.
  20.  
  21. Properly fill the engine cooling system.
  22.  
  23. Bleed the power steering system.
  24.  

BLEEDING



See Figure 6

  1. With the engine OFF and wheels off the ground, turn the steering wheel all the way to the left. Add power steering fluid to the COLD mark on the fluid level indicator.
  2.  
  3. Bleed the system by turning the wheels from side-to-side without reaching the stop at either end. It may be necessary to turn the wheel from side-to-side several times. Be sure to keep the fluid full.
  4.  
  5. Start the engine. With engine idling, recheck the fluid level. If necessary add fluid to bring the fluid up to the COLD mark.
  6.  



Click image to see an enlarged view

Fig. Fig. 6: Bleeding the power steering system

  1. Return the wheels to the center position. Lower the front wheels to the ground and continue to run for 2-3 minutes.
  2.  
  3. Road test the vehicle to make sure the steering functions normally and without noise.
  4.  
  5. Check for fluid leakage. Check to make sure the fluid level is at the HOT mark after system is stabilized at its normal operating temperature.
  6.  

 
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