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Inspection Procedure

  1. Inspect the power steering pump body and the cover for cracks or leaks.
  2. If any of the following conditions are present on the pump body or any internal part, replace the power steering pump. Refer to Power Steering Pump Replacement (2.0L)  or Power Steering Pump Replacement (2.5L) .
    • Excessive wear
    • Cracks
    • Leaks
      • Fig 1: Inspecting Power Steering Pump Body
      GM462275Courtesy of GENERAL MOTORS CORP.
  3. Inspect the side plate and the shaft for excessive wear and damage. If any defect is found, replace the pump assembly. Refer to Power Steering Pump Replacement (2.5L) .
    4. Fig 2: Inspecting Side Plate & Shaft
    GM462261Courtesy of GENERAL MOTORS CORP.
  4. Inspect the cam ring for excessive wear and damage. If any defect is found, replace the pump assembly. Refer to Power Steering Pump Replacement (2.0L)  or Power Steering Pump Replacement (2.5L) .
    5. Fig 3: Inspecting Cam Ring
    GM462268Courtesy of GENERAL MOTORS CORP.
  5. Inspect the sliding surfaces of the rotor and the vane for wear and damage. If wear or damage is present, replace the rotor and the vanes with the power steering pump seal kit.
    6. Fig 4: Inspecting Sliding Surfaces Of Rotor & Vane
    GM462289Courtesy of GENERAL MOTORS CORP.
  6. Use a feeler gauge (1) in order to measure the vane-to-rotor clearance.

    Measurement:  The allowable vane-to-rotor clearance is 0.015-0.027 mm (0.0006-0.0011 in).

  7. If the vane to rotor clearance is greater than the specified range, replace the rotor and the vanes with the power steering pump seal kit.
    8. Fig 5: View Of Feeler Gauge
    GM462295Courtesy of GENERAL MOTORS CORP.
  8. Inspect the fluid passage of the relief valve and the orifice of the connector for obstructions.
  9. Inspecting the sliding surface of the relief valve for wear and damage.
    10. Fig 6: Inspecting Fluid Passage of Relief Valve & Orifice Of Connector
    GM462298Courtesy of GENERAL MOTORS CORP.
  10. Use the dial calipers in order to measure the free length of the flow control valve spring (1).

    Measurement:  The free length of the spring should be within 19.0-22.0 mm (0.748-0.866 in).

  11. If the valve spring does not fall within the specifications, replace the power steering pump. Refer to Power Steering Pump Replacement (2.0L)  or Power Steering Pump Replacement (2.5L) .
    12. Fig 7: View Of Flow Control Valve Spring
    GM462302Courtesy of GENERAL MOTORS CORP.
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