Power Steering System Buick Century VI

Fastener Tightening Specifications

Fastener Tightening Specifications

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Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - POWER STEERING SYSTEM in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Visual/Physical Inspection

1. Review the system description and operation in order to familiarize yourself with the system functions. Refer to «POWER STEERING SYSTEM DESCRIPTION AND OPERATION»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. Inspect for aftermarket devices which could affect the operation of the power steering system.
3. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
4. Inspect the power steering reservoir for the proper power steering fluid level and condition. Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
5. «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)
6. «RATTLE, CLUNK, OR SHUDDER NOISE FROM THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)
7. «WHINE OR GROWL NOISE FROM THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)
8. «STEERING EFFORT HARD IN ONE OR BOTH DIRECTIONS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)
9. «STEERING EFFORT TOO EASY IN ONE OR BOTH DIRECTIONS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)

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Test Description

The numbers below refer to the step numbers on the diagnostic table.

3. This step tests the system for restrictions.

5. This step tests the following components for the following conditions

1. The pump for internal leaks
2. The power steering pipes for kinks

6. This step tests the ability of the pump to regulate flow at maximum pressure.

8. This step tests the ability of the pump to regulate flow under normal operating conditions.

10. This step tests the internal components of the pump and the gear.

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Tools Required

1. J 35555 Mityvac. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. J 43485 Power Steering Bleeder Adapter. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Note. If the power steering system has been serviced, an accurate fluid level reading cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise and may cause pump damage over a period of time.

Note. When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.

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Important

1. Use clean, new power steering fluid type only. See the Maintenance and Lubrication subsection for fluid specifications.
2. Hoses touching the frame, body, or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle.
3. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.
4. Maintain the fluid level throughout the bleed procedure. Remove the pump reservoir cap. Fill the pump reservoir with fluid to the FULL COLD level.

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1. Attach J 43485 to J 35555 or equivalent.
2. Place J 43485 on or in the pump reservoir filler neck.
3. Apply a vacuum of 68 kPa (20 in Hg) maximum.
4. Wait 5 minutes. Typical vacuum drop is 7-10 kPa (2-3 in Hg). If the vacuum does not remain steady, refer to Excessive Vacuum Drop Diagnosis at the end of this procedure.
5. Remove the J 43485 and the J 35555.
6. Reinstall the pump reservoir cap.
7. Start the engine. Allow the engine to idle.
8. Turn OFF the engine.
9. Verify the fluid level. Repeat steps 8-10 until the fluid stabilizes. IMPORTANT: Do NOT turn the steering wheel to LOCK.
10. Start the engine. Allow the engine to idle.
11. Turn the steering wheel 180-360 degrees in both directions 5 times.
12. Turn OFF the ignition.
13. Verify the fluid level.
14. Remove the pump reservoir cap.
15. Attach J 43485 to J 35555 or equivalent.
16. Place J 43485 on or in the pump reservoir filler neck.
17. Apply a vacuum of 68 kPa (20 in Hg) maximum.
18. Wait 5 minutes.
19. Remove J 43485 and J 35555.
20. Verify the fluid level.
21. Reinstall the pump reservoir cap.

Excessive Vacuum Drop Diagnosis

Tools Required

1. J 35555 Mityvac. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. J 43485 Power Steering Bleed Adapter. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

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1. If the vacuum continues to drop, remove the pressure hose and the return hose from the pump.
2. Install the plugs (1, 2) supplied with J 43485 into the pressure and the return port.
3. Attach J 43485 to J 35555 or equivalent.
4. Place J 43485 on or in the pump reservoir filler neck.
5. Apply a vacuum of 68 kPa (20 in Hg) maximum.
6. If the vacuum drops again, repair or replace the pump. If the vacuum holds steady, continue to check the other parts of the steering system. IMPORTANT: Fluid must be free from bubbles and foam. Be aware of periodic bubbles that indicate a loose connection or leaking O-ring seal in the return hose or in the pressure hose. Fluid must be free from discoloration.
7. Observe the fluid.
8. If the condition persists, replace the following parts: The return hose clamps The return hose O-rings The pressure hose O-rings The gear cylinder line O-rings The reservoir to pump O-ring
9. Repeat the bleed procedure from the beginning.
10. Drive the vehicle approximately 16 km (10 mi) in order to warm the system to operating temperature. Evaluate the vehicle on a smooth flat surface.
11. Verify the following conditions: The power assist is smooth. The vehicle operates quietly. The pump maintains the proper fluid level. The steering system does not leak. The fluid is free of foam or discoloration.

Checking and Adding Power Steering Fluid

Note. When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.

1. Clean the area surrounding the reservoir cap.
2. Remove the reservoir cap.
3. Inspect the power steering pump fluid level at regular intervals. Add fluid when required. If the fluid level is being checked cold, perform the following steps: Remove the reservoir cap. Inspect the fluid level on the dipstick. The fluid level should be between the bottom of the COLD/FULL mark and the end of the dipstick. If the fluid level is being checked hot, perform the following steps: Run the engine until the fluid reaches about 80°C (170°F). Turn OFF the engine. Remove the reservoir cap. Inspect the fluid level on the dipstick. The fluid level should be between the HOT/FULL and the COLD/FULL marks on the dipstick.
4. If the fluid level is low, add the power steering fluid to the proper level.
5. Install the reservoir cap.
6. When you inspect the fluid level after servicing the steering system, bleed the air from the system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

1. Turn off the engine.
2. Raise the front end of the vehicle off the ground until the tires and wheels turn freely. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
3. Place a large container under the fluid return hose in order to collect the draining fluid.
4. Remove the fluid return hose at the power steering pump reservoir inlet connection.
5. Plug the reservoir return hose inlet connection on the power steering pump. Important: This step may require 4 L (4 qt) of power steering fluid until the draining fluid appears clear. Do not run the engine without the power steering fluid level at FULL COLD.
6. Run the engine at idle while an assistant maintains the fluid level at FULL COLD in the reservoir using new approved power steering fluid.
7. Turn off the engine.
8. Turn the steering wheel fully to the left and to the right.
9. Remove the plug from the pump reservoir inlet connection.
10. Install the fluid return hose to the pump reservoir.
11. Maintain the fluid level at FULL COLD.
12. Operate the engine at idle for approximately 15 minutes.
13. Repeat steps 3-5.
14. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Plastic debris or dirt chunks
15. If the fluid is contaminated, repeat steps 6-12 in order to complete a third flush.
16. Remove the plug from the pump reservoir inlet connection.
17. Install the fluid return hose to the pump reservoir.
18. Clean any spilled fluid.
19. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Power Steering Pulley Replacement (3.8L)

Tools Required

1. J 25033-C Power Steering Pump Pulley Installer. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. J 37609-A Power Steering Pump Pulley Remover. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

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1. Remove the power steering pump from the engine for clearance. Refer to «POWER STEERING PUMP REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PUMP REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. Using J 37609-A remove the power steering pump pulley from the power steering pump.

Installation Procedure

Important

1. Never use a hammer to install the power steering pulley.
2. The face of the power steering pulley hub must be flush with the end of the power steering pump driveshaft.

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1. Using J 25033-C install the power steering pump pulley to the power steering pump.
2. Install the power steering pump to the engine. Refer to «POWER STEERING PUMP REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PUMP REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
3. Fill the power steering system. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
4. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
5. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Power Steering Pulley Replacement (3.1L)

Tools Required

1. J 25033-C Power Steering Pump Pulley Installer. See «Special Tools and Equipment»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. J 37609-A Power Steering Pump Pulley Remover

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1. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical-3.1L.
2. Remove the BEC for tool clearance. Refer to «UNDERHOOD ELECTRICAL CENTER OR JUNCTION BLOCK REPLACEMENT»(/buick/century/vi-1997-2005/remont/body-electrical/#wiring-systems) in Wiring Systems.
3. Using J 37609-A remove the power steering pump pulley from the power steering pump.

Important

1. Never use a hammer to install the power steering pulley.
2. The face of the power steering pulley hub must be flush with the end of the power steering pump driveshaft.

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1. Using J 25033-C install the power steering pump pulley to the power steering pump.
2. Install the accessory drive belt. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical-3.1L.
3. Fill the power steering system. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
4. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
5. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

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1. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
3. Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
4. Remove the power steering pressure hose from the power steering pump. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
5. Remove the power steering return hose from the power steering pump. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
6. Remove the electrical connector (4) from the power steering pump (1).
7. Remove the power steering mounting bolts from the power steering pump.
8. Remove the power steering pump.
9. Remove the power steering pump reservoir from the power steering pump. Refer to «POWER STEERING RESERVOIR REPLACEMENT - OFF VEHICLE (CB SERIES)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
10. Remove the power steering pump pulley from the power steering pump. Refer to «POWER STEERING PULLEY REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-38l) or «POWER STEERING PULLEY REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-31l) .

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1. Install the power steering pump reservoir to the power steering pump. Refer to «POWER STEERING RESERVOIR REPLACEMENT - OFF VEHICLE (CB SERIES)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. Install the power steering pump pulley to the power steering pump. Refer to «POWER STEERING PULLEY REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-38l) or «POWER STEERING PULLEY REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-31l) .
3. Position the power steering pump to the engine. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the power steering pump mounting bolts. Tighten Tighten the mounting bolts to 34 N.m (25 lb ft).
5. Install the power steering pressure hose to the power steering pump. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
6. Install the power steering return hose to the power steering pump. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
7. Install the electrical connector (1) to the power steering pump (4).
8. Install the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
9. Fill the power steering system with fluid. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
10. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
11. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

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1. Remove the coolant recovery reservoir and move aside. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
2. Remove the accessory drive belt from the power steering pump pulley. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical-3.1L.
3. Remove the ignition control wiring harness near the power steering pump.
4. Remove the power steering pressure hose from the power steering pump. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
5. Remove the power steering return hose from the power steering pump. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
6. Remove the power steering pump mounting bolts.
7. Remove the power steering pump.
8. Remove the power steering pump pulley from the power steering pump. Refer to «POWER STEERING PULLEY REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-38l) or «POWER STEERING PULLEY REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-31l) .
9. Remove the power steering pump reservoir from the power steering pump. Refer to «POWER STEERING RESERVOIR REPLACEMENT - OFF VEHICLE (CB SERIES)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system)

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1. Install the power steering pump reservoir to the power steering pump. Refer to «POWER STEERING RESERVOIR REPLACEMENT - OFF VEHICLE (CB SERIES)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
2. Install the power steering pump pulley to the power steering pump. Refer to «POWER STEERING PULLEY REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-38l) or «POWER STEERING PULLEY REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__power-steering-pulley-replacement-31l) .
3. Position the power steering pump to the engine. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the power steering pump mounting bolts. Tighten Tighten the mounting bolts to 34 N.m (25 lb ft).
5. Install the power steering pressure hose to the power steering pump. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
6. Install the power steering return hose to the power steering pump. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
7. Install the ignition control wiring harness to the power steering pump.
8. Install the accessory drive belt to the power steering pump pulley. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical-3.1L.
9. Install the coolant recovery reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
10. Fill the power steering system with power steering fluid. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
11. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
12. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
13. Remove the drain pan from under the vehicle.

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1. Place the hydraulic pump (1) on a fixed, flat surface, with the shaft facing upward.
2. Insert a screwdriver into the retaining clip tab (3).
3. Using the screwdriver, force the retaining clip tab (3) outward.
4. Slide the reservoir clip (4) away from the hydraulic pump assembly (1).
5. Repeat the above steps to remove the second reservoir clip (4).
6. Remove the reservoir (2) from the hydraulic pump housing (1).
7. Remove the O-ring seal from the neck of the reservoir (2) or inside the hydraulic pump housing (1). Discard the O-ring seal.

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1. Lubricate the new O-ring seal with power steering fluid.
2. Install the new O-ring seal onto the neck of the reservoir (2).
3. Install the reservoir (2) onto the hydraulic pump assembly (1). Ensure the reservoir neck is completely engaged onto the hydraulic pump assembly (1).
4. Align the feet of the reservoir with the sides of the hydraulic pump housing.
5. Install the new reservoir retaining clips (4) (supplied with the pump). Ensure the retaining clip tabs (3) fully engage with the hydraulic pump housing (1).

Disassembly Procedure

1. Remove the O-ring union fitting (5) from the hydraulic pump housing assembly (1).
2. Remove the O-ring seal (4) from the O-ring union fitting (5).
3. Remove the control valve assembly (3).
4. Remove the flow control spring (2).

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Assembly Procedure

1. Install the flow control spring (2) to the hydraulic pump housing assembly (1).
2. Install the control valve assembly (3).
3. Lubricate the O-ring seal (4) with power steering fluid.
4. Install the O-ring seal (4) onto the O-ring union fitting (5). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
5. Install the O-ring union fitting (5) into the hydraulic pump housing assembly (1).

Tighten

Tighten the fitting (5) to 75 N.m (55 lb ft).

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Tie Rod End Replacement - Outer

Tools Required

J 24319-B Universal Steering Linkage Puller. See Special Tools and Equipment .

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1. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
3. Remove the prevailing torque nut (2) from the outer tie rod assembly (1).
4. Loosen the jam nut (2) on the inner tie rod assembly (1). NOTE: Do not attempt to disconnect a steering linkage joint by driving a wedge between the joint and the attached part. Seal damage may result which will cause premature failure of the joint.
5. Remove the outer tie rod assembly from the steering knuckle using J 24319-B.
6. Remove the outer tie rod assembly (3) from the inner tie rod assembly (1).

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1. Install the outer tie rod assembly (3) to the inner tie rod assembly (1). Do NOT tighten the jam nut (2).
2. Install the outer tie rod assembly (2) to the steering knuckle (1). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the prevailing torque nut (2) to the outer tie rod assembly (1). Tighten Tighten the nut to 30 N.m (22 lb ft) + 115 degrees of rotation.
4. Install tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
5. Lower the vehicle.
6. Perform a front end alignment. Refer to MEASURING WHEEL ALIGNMENT in Wheel Alignment.

Rack and Pinion Boot Replacement - On Vehicle

Tools Required

J 22610 Keystone Clamp Pliers. See Special Tools and Equipment .

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1. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
3. Remove the outer tie rod from the inner tie rod assembly. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) .
4. Remove the intermediate steering shaft lower pinch bolt. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT in Steering Wheel and Column.
5. Remove the rear frame mounting bolts to allow for tool access.
6. Remove the inner tie rod jam nut (2) from the inner tie rod assembly (1).
7. Remove the clamp (2) from the end of the inner tie rod boot (1).
8. Remove the inner tie rod boot clamp (1) from the inner tie rod boot (3) with side cutters.
9. Discard the inner tie rod boot clamp (1). IMPORTANT: Prior to removing breather tube (2) or the inner tie rod boot (3), mark the location of the breather tube (2) on the power steering gear assembly.
10. Remove the inner tie rod boot (3) and the breather tube (2).

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

1. Install the new inner tie rod boot clamp (1) onto the inner tie rod boot (3).
2. Prior to the inner tie rod boot (3) installation, apply grease to the inner tie rod assembly (2) and the power steering gear assembly (1).
3. Install the inner tie rod boot (3) onto the inner tie rod assembly (2).
4. Align the breather tube with the mark made during removal and the molded nipple of the inner tie rod boot.
5. Install the inner tie rod boot (3) onto the power steering gear assembly until the inner tie rod boot (3) is seated in the power steering gear assembly groove. IMPORTANT: The inner tie rod boot (3) must not be twisted, puckered or out of shape in any way. If the inner tie rod boot (3) is not shaped properly, adjust the inner tie rod boot (3) by hand before installing the boot clamp.
6. Install the inner tie rod boot (3) onto the inner tie rod assembly (2).
7. Using the J 22610 install the inner tie rod boot clamp (1) on the inner tie rod boot (2) by firmly crimping the inner tie rod boot clamp (1).
8. Install the inner tie rod small boot clamp (2).
9. Install the inner tie rod jam nut (2) to the inner tie rod assembly (1).
10. Install the rear frame mounting bolts.
11. Install the intermediate steering shaft lower pinch bolt. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT in Steering Wheel and Column.
12. Install the outer tie rod to the inner tie rod assembly. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) .
13. Install the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
14. Lower the vehicle.
15. Perform a front end alignment. Refer to MEASURING WHEEL ALIGNMENT in Wheel Alignment.

Scheme 55

Scheme 56

1. Raise the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the return hose from the cooler pipe/hose. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
3. Remove the cooler pipe/hose retaining bolt from the frame.
4. Remove the cooler pipe/hose from the retaining clips on the frame.
5. Remove the cooler pipe/hose from the clamps on the steering gear.
6. Remove the wiring harness clip from the cooler pipe/hose.
7. Remove the cooler pipe/hose from the steering gear.
8. Remove the cooler pipe/hose from the vehicle.

Scheme 57

Scheme 58

1. Install the cooler pipe/hose to the vehicle. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the cooler pipe/hose to the steering gear. Tighten Tighten the fitting to 27 N.m (20 lb ft).
3. Install the wiring harness clip to the cooler pipe/hose.
4. Install the cooler pipe/hose to the clips on the steering gear.
5. Install the cooler pipe/hose to the retaining clip on the frame.
6. Install the cooler pipe/hose retaining bolt to the frame. Tighten Tighten the bolt to 10 N.m (89 lb in).
7. Install the return hose to the cooler pipe/hose. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
8. Lower the vehicle.
9. Fill the power steering system. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
10. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
11. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Scheme 59

Scheme 60

Scheme 61

1. Place a drain pan under the vehicle.
2. Remove the coolant reservoir to allow access to the power steering pressure hose. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
3. Remove the pressure hose from the power steering pump.
4. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
5. Remove the pressure hose from the retaining bracket on the engine.
6. The power steering pressure hose is the lower hose at the power steering gear. Remove the pressure hose from the gear.
7. Remove the power steering pressure hose from the clamps on the power steering gear.
8. Remove the power steering pressure hose (1) from the vehicle.

Scheme 62

Scheme 63

Scheme 64

1. Install the power steering pressure hose (1) to the vehicle.
2. Install the power steering pressure hose to the clamps on the power steering gear. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the power steering pressure hose to the power steering gear. Tighten Tighten the fitting to 27 N.m (20 lb ft).
4. Install the power steering pressure hose to the retaining bracket on the engine.
5. Lower the vehicle.
6. Install the power steering pressure hose to the power steering pump. Tighten Tighten the fitting to 27 N.m (20 lb ft).
7. Install the coolant reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
8. Fill the power steering system with power steering fluid. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
9. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
10. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
11. Remove the drain pan from under the vehicle.

Scheme 65

1. Place a drain pan under the vehicle.
2. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
3. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
5. The power steering pressure hose is the lower hose at the power steering gear. Remove the power steering pressure hose from the power steering gear.
6. Remove the power steering pressure hose from the power steering pump.
7. Remove the power steering pressure hose from the clamps on the power steering gear.
8. Remove the power steering pressure hose from the vehicle.

Scheme 66

1. Install the power steering pressure hose to the vehicle.
2. Install the power steering pressure hose to the clamps on the power steering gear. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the power steering pressure hose to the power steering pump. Tighten Tighten the fitting to 27 N.m (20 lb ft).
4. Install the power steering pressure hose to the power steering gear. Tighten Tighten the pressure hose fitting to 27 N.m (20 lb ft).
5. Install the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels
6. Remove the drain pan from under the vehicle.
7. Lower the vehicle.
8. Install the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
9. Fill the power steering system with power steering fluid. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
10. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
11. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Scheme 67

1. Place a drain pan under the vehicle in order to catch any draining power steering fluid.
2. Remove the coolant reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
3. Remove the return hose from the power steering pump.
4. Remove the return hose from the retaining bracket on the engine.
5. Remove the return hose from the cooler pipe/hose.
6. Remove the return hose from the vehicle.

Scheme 68

1. Install the power steering return hose to the cooler pipe/hose.
2. Install the return hose to the retaining bracket on the engine.
3. Install the return hose to the power steering pump.
4. Install the coolant reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
5. Fill the power steering system. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
6. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
7. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
8. Remove the drain pan from under the vehicle.

Scheme 69

Scheme 70

1. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
3. Place a drain pan under the vehicle in order to catch any draining power steering fluid.
4. Remove the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
5. Remove the power steering return hose from the power steering gear.
6. Remove the return hose from the power steering pump.
7. Remove the return hose from the hose retainer.
8. Remove the return hose from the vehicle.

Scheme 71

Scheme 72

1. Install the return hose to the hose retainer.
2. Install the return hose to the power steering pump.
3. Install the return hose to the power steering gear. Tighten Tighten the fitting to 27 N.m (20 lb ft).
4. Install the tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
5. Remove the drain pan from under the vehicle.
6. Lower the vehicle.
7. Install the accessory drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) in Engine Mechanical-3.8L.
8. Fill the power steering fluid reservoir. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
9. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
10. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .

Scheme 73

Scheme 74

Scheme 75

1. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
2. Place a drain pan under the vehicle.
3. Remove the tire and wheel assemblies. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels. CAUTION: Failure to disconnect the intermediate shaft from the rack and pinion stub shaft can result in damage to the steering gear and/or intermediate shaft. This damage can cause loss of steering control which could result in personal injury. NOTE: Set steering shaft so the block tooth on the upper steering shaft is at the 12 o'clock position, the wheels on the vehicle are straight ahead and set the ignition switch to the LOCK position. Failure to follow these procedures could result in damage to the coil.
4. Remove the intermediate steering shaft from the steering gear. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT in Steering Wheel and Column.
5. Remove both of the tie rod ends from the steering knuckles. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) .
6. Support the rear of the frame (3) using jackstands.
7. Remove the frame bolts from the rear of the frame. Refer to Frame Replacement NOTE: Do not lower the rear of the frame too far as damage to the engine components nearest to the cowl may result.
8. Lower the rear of the frame (3).
9. Remove the power steering pressure hose from the power steering gear. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
10. Remove the power steering return hose from the power steering gear. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
11. Remove the Magnasteer Variable Assist electrical connector from the power steering gear assembly, if equipped with variable effort steering.
12. Remove the power steering gear mounting bolts and nuts (1,4).
13. Remove the power steering gear through the left wheel opening.

Scheme 76

Scheme 77

Scheme 78

1. Install the power steering gear through the left wheel opening. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the power steering gear mounting bolts and nuts (1,4). Tighten Tighten the power steering gear mounting bolts to 80 N.m (59 lb ft).
3. Inspect the threads on the power steering pressure hose and the power steering return hose.
4. Inspect the O-ring seals on the power steering hoses.
5. Replace the seals if damaged, lubricate the seals before installation.
6. Install the clamp that holds the power steering hoses to the power steering gear.
7. Install the Magnasteer Variable Assist electrical connector to the power steering gear assembly, if equipped with variable effort steering.
8. Install the power steering pressure hose to the power steering gear. Refer to «POWER STEERING PRESSURE HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING PRESSURE HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
9. Install the power steering return hose to the power steering gear. Refer to «POWER STEERING RETURN HOSE REPLACEMENT (3.1L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) or «POWER STEERING RETURN HOSE REPLACEMENT (3.8L)»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
10. Raise the frame into position (3).
11. Install rear frame bolts. Refer to
12. Remove the jackstands.
13. Install the tie rod ends to the steering knuckles. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) . NOTE: Set steering shaft so the block tooth on the upper steering shaft is at the 12 o'clock position, the wheels on the vehicle are straight ahead and set the ignition switch to the LOCK position. Failure to follow these procedures could result in damage to the coil. IMPORTANT: During the installation of the intermediate steering shaft, ensure the steering shaft is seated before you install the pinch bolt. The two mating shafts may disengage if the pinch bolt is inserted into the coupling before the steering shaft installation.
14. Install the intermediate steering shaft to the steering gear (5). Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT In Steering Wheel and Column.
15. Install the tire and wheel assemblies. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
16. Remove the drain pan from under the vehicle.
17. Lower the vehicle.
18. Fill the power steering system with power steering fluid. Refer to «CHECKING AND ADDING POWER STEERING FLUID»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__checking-and-adding-power-steering-fluid) .
19. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
20. Inspect the power steering system for leaks. Refer to «POWER STEERING FLUID LEAKS»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
21. Preform a front end alignment. Refer to MEASURING WHEEL ALIGNMENT in Wheel Alignment.

Scheme 79

1. Loosen the adjuster plug lock nut (1).
2. Turn the adjuster plug clockwise until the adjuster plug bottoms in the gear assembly.
3. Turn the adjuster plug back 50 degrees to 70 degrees (approximately one flat). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the adjuster plug lock nut (1) to the adjuster plug. Tighten Hold the adjuster plug stationary while tightening the adjuster plug lock nut (1) to 68 N.m (50 lb ft).

Scheme 80

1. Loosen the adjuster plug lock nut (1).
2. Turn the adjuster plug clockwise until the adjuster plug bottoms in the gear assembly.
3. Turn the adjuster plug back 50 degrees to 70 degrees (approximately one flat). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the adjuster plug lock nut (1) to the adjuster plug. Tighten Hold the adjuster plug stationary while tightening the adjuster plug lock nut (1) to 68 N.m (50 lb ft).

Rack and Pinion Boot and Breather Tube Replacement - Off Vehicle

Tools Required

J 22610 Service Boot Clamp Installer. See Special Tools and Equipment .

Scheme 81

Scheme 82

Scheme 83

Scheme 84

1. To remove the outer tie rod. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) .
2. Remove the hexagon jam nut (2) from the inner tie rod assembly (1).
3. Remove the tie rod end clamp (2) from the rack and pinion boot (1).
4. Remove the boot clamp (1) from the rack and pinion boot with side cutters.
5. Discard the boot clamp (1). IMPORTANT: If a breather tube is present, mark the location of the breather tube on the gear assembly before removal of the rack and pinion boot.
6. Remove the rack and pinion boot (1) and the breather tube, if present, from the rack and pinion gear assembly.

Scheme 85

Scheme 86

Scheme 87

Scheme 88

Scheme 89

1. Install the new boot clamp (1) onto the rack and pinion boot (3).
2. Prior to rack and pinion boot installation, apply grease to the inner tie rod assembly (2) and the rack and pinion gear assembly (1).
3. Install the rack and pinion boot (3) onto the inner tie rod assembly (2).
4. If present, install the breather tube while aligning the breather tube with the mark made during removal and the molded nipple of the rack and pinion boot. IMPORTANT: The rack and pinion boot (3) must not be twisted, puckered or out of shape in any way. If the rack and pinion boot (3) is not shaped properly, adjust the rack and pinion boot (3) by hand before installing the boot clamp.
5. Install the rack and pinion boot onto the gear assembly (1) until the rack and pinion boot (3) is seated in the gear assembly groove.
6. Install the boot clamp (1) on the rack and pinion boot (2) with J 22610.
7. Crimp the boot clamp (1).
8. Pinch the pliers together on the rack and pinion boot (2) in order to install the tie rod end clamp.
9. Install the tie rod end clamp (2) onto the rack and pinion boot (1).
10. Install the hexagon jam nut (2) to the inner tie rod assembly (1).
11. To assemble the outer tie rod assembly. Refer to «TIE ROD END REPLACEMENT - OUTER»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__tie-rod-end-replacement-outer) .

Tie Rod Replacement - Inner (Magnasteer)

Tools Required

J 34028 Inner Tie Rod Wrench. See Special Tools and Equipment .

Scheme 90

Scheme 91

Scheme 92

1. To remove the rack and pinion boot and the breather tube. Refer to «RACK AND PINION BOOT AND BREATHER TUBE REPLACEMENT - OFF VEHICLE»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__rack-and-pinion-boot-and-breather) .
2. Place the gear in a vise. NOTE: Do not change the steering gear preload adjustment before moving the inner tie rod from the steering gear. Changing the steering gear preload adjustment before moving the inner tie rod could result in damage to the pinion and the steering gear.
3. Remove the shock dampener (6) from the inner tie rod assembly (4).
4. Slide the shock dampener (6) back on the rack (5). NOTE: The pipe wrench must be placed at the valve end of the steering gear and positioned up against the inner tie rod housing. Placing the pipe wrench in any other location will cause damage to the steering gear.
5. Place a pipe wrench on the rack (5) next to the inner tie rod housing (4).
6. Place a wrench on the flats of the inner tie rod housing (4).
7. Rotate the inner tie rod housing (4) counterclockwise, while holding the rack stationary, until the inner tie rod separates from the rack (5).
8. Remove the shock dampener (3) from the inner tie rod housing (2).
9. Slide the shock dampener (3) back on the rack (5). NOTE: The pipe wrench must be placed at the valve end of the steering gear and positioned up against the inner tie rod housing. Placing the pipe wrench in any other location will cause damage to the steering gear.
10. Place a pipe wrench on the rack.
11. Place a wrench on the flats of the inner tie rod housing (2).
12. Rotate the inner tie rod housing (2) counterclockwise, while holding the rack stationary, until the inner tie rod (1) separates from the rack (5).
13. If female rack (1) and male inner tie rod (3), remove the old LOCTITE® from the threads (2) of the inner tie rod (3) and the rack (1).

If male rack (5) and female inner tie rod (4) LOCTITE® will not be present.

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

1. Slide the shock dampener (4) forward onto the rack (3). IMPORTANT: Threads must be clean prior to LOCTITE® application. Check LOCTITE® (or equivalent) container for expiration date. Use only enough LOCTITE® to evenly coat threads. If male rack (3) and female inner tie rod (2) do not apply LOCTITE®.
2. If female rack (3) and male inner tie rod (2), apply LOCTITE® 262 (or equivalent) to the inner tie rod threads.
3. Attach the inner tie rod onto the rack (3). NOTE: The pipe wrench must be placed at the valve end of the steering gear and positioned up against the inner tie rod housing. Placing the pipe wrench in any other location will cause damage to the steering gear.
4. Place a pipe wrench on the rack (3) next to the inner tie rod housing (2). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
5. Place a torque wrench and J 34028 on the flats of the inner tie rod housing (2). Tighten Tighten the inner tie rod to 100 N.m (74 lb ft).
6. Slide the shock dampener (2) forward onto the rack. IMPORTANT: Threads must be clean prior to LOCTITE® application. Check LOCTITE® (or equivalent) container for expiration date. Use only enough LOCTITE® to evenly coat threads. If male rack and female inner tie rod (1) do not apply LOCTITE®.
7. If female rack and male inner tie rod (1), apply LOCTITE® 262 (or equivalent) to the inner tie rod threads.
8. Attach the inner tie rod (1) onto the rack. NOTE: The pipe wrench must be placed at the valve end of the steering gear and positioned up against the inner tie rod housing. Placing the pipe wrench in any other location will cause damage to the steering gear.
9. Place a pipe wrench on the rack next to the inner tie rod housing (4).
10. Place a torque wrench and J 34028 on the flats of the inner tie rod housing (7). Tighten Tighten the inner tie rod to 100 N.m (74 lb ft).
11. Place the inner tie rod assembly (2) in a vise. IMPORTANT: If female rack (1) and male inner tie rod (2) do not stake. If male rack (1) and female inner tie rod (2) you must stake.
12. Stake both sides of the female inner tie rod assembly housing to the male rack (1).
13. Insert a 0.25 mm gage (1) between the male rack (2) and the female inner tie rod housing in order to check both stakes. The feeler gauge (1) must not pass between the rack and the housing stake.
14. Slide the shock dampener (2) over the inner tie rod housing (3) until the front lip of the shock dampener (2) bottoms against the inner tie rod housing (3).
15. To assemble the rack and pinion boot and the breather tube. Refer to «RACK AND PINION BOOT AND BREATHER TUBE REPLACEMENT - OFF VEHICLE»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__rack-and-pinion-boot-and-breather) .

Tie Rod Replacement - Inner (Quiet Valve)

Tools Required

J 34028 Inner Tie Rod Wrench. See Special Tools and Equipment .

Scheme 98

Scheme 99

Scheme 100

1. To remove the rack and pinion boot and the breather tube. Refer to «RACK AND PINION BOOT AND BREATHER TUBE REPLACEMENT - OFF VEHICLE»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__rack-and-pinion-boot-and-breather) .
2. Place the gear in a vise. NOTE: Do not change the steering gear preload adjustment before moving the inner tie rod from the steering gear. Changing the steering gear preload adjustment before moving the inner tie rod could result in damage to the pinion and the steering gear.
3. Remove the shock dampener (4) from the inner tie rod housing (6).
4. Slide the shock dampener (4) back on the rack (5). NOTE: Refer to Pipe Wrench Positioning Notice in Cautions and Notices.
5. Place a pipe wrench on the rack (5) next to the inner tie rod housing (6).
6. Place a wrench on the flats of the inner tie rod housing (6).
7. Rotate the inner tie rod housing (6) counterclockwise, while holding the rack stationary, until the inner tie rod separates from the rack (5). NOTE: Do not change the steering gear preload adjustment before moving the inner tie rod from the steering gear. Changing the steering gear preload adjustment before moving the inner tie rod could result in damage to the pinion and the steering gear.
8. Remove the shock dampener (3) from the inner tie rod housing (2).
9. Slide the shock dampener (3) back on the rack (5). NOTE: Refer to Pipe Wrench Positioning Notice in Cautions and Notices.
10. Place a pipe wrench on the rack.
11. Place a wrench on the flats of the inner tie rod housing (2).
12. Rotate the inner tie rod housing (2) counterclockwise, while holding the rack stationary, until the inner tie rod (1) separates from the rack (5).
13. If female rack (1) and male inner tie rod (3), remove the old LOCTITE® from the threads (2) of the inner tie rod and the rack. If male rack (5) and female inner tie rod (4) LOCTITE® will not be present.

Scheme 101

Scheme 102

Scheme 103

Scheme 104

Scheme 105

1. Slide the shock dampener (4) forward onto the rack (3). IMPORTANT: Threads must be clean prior to LOCTITE® application. Check LOCTITE® or equivalent, container for expiration date. Use only enough LOCTITE® to evenly coat threads. If male rack (3) and female inner tie rod (2) do not apply LOCTITE®.
2. If female rack (3) and male inner tie rod (2), apply LOCTITE® 262 (or equivalent) to the inner tie rod threads.
3. Attach the inner tie rod onto the rack (3). NOTE: Refer to Pipe Wrench Positioning Notice in Cautions and Notices.
4. Place a pipe wrench on the rack (3) next to the inner tie rod housing (2). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) Cautions and Notices.
5. Place a torque wrench and J 34028 on the flats of the inner tie rod housing (2). Tighten Tighten the inner tie rod to 100 N.m (74 lb ft).
6. Slide the shock dampener (2) forward onto the rack. IMPORTANT: Threads must be clean prior to LOCTITE® application. Check LOCTITE®, or equivalent, container for expiration date. Use only enough LOCTITE® to evenly coat threads. If male rack and female inner tie rod (1) do not apply LOCTITE®.
7. If female rack and male inner tie rod (1), apply LOCTITE® 262, or equivalent, to the inner tie rod threads.
8. Attach the inner tie rod (1) onto the rack. NOTE: Refer to Pipe Wrench Positioning Notice in Cautions and Notices.
9. Place a pipe wrench on the rack next to the inner tie rod housing (4).
10. Place a torque wrench and J 34028 on the flats of the inner tie rod housing (7). Tighten Tighten the inner tie rod to 100 N.m (74 lb ft).
11. Place the inner tie rod assembly (2) in a vise. IMPORTANT: If female rack (1) and male inner tie rod (2) do not stake. If male rack (1) and female inner tie rod (2) you must stake.
12. Stake both sides of the female inner tie rod assembly housing to the male rack.
13. Insert a 0.010 inch gage (1) between the rack (2) and the inner tie rod housing in order to check both stakes. The feeler (1) must not pass between the rack and the housing stake.
14. Slide the shock dampener (2) over the inner tie rod housing (3) until the front lip of the shock dampener (2) bottoms against the inner tie rod housing (3).
15. To assemble the rack and pinion boot and the breather tube. Refer to «RACK AND PINION BOOT AND BREATHER TUBE REPLACEMENT - OFF VEHICLE»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system__rack-and-pinion-boot-and-breather) .

Scheme 106

Scheme 107

Scheme 108

1. Loosen both cylinder line fittings (1) on the cylinder end of the gear assembly.
2. Loosen both fittings on the cylinder line assemblies (3) at the valve end of the gear assembly.
3. Remove both cylinder line assemblies (1) from the rack and pinion gear assembly (2).
4. Remove the O-ring seals (1) from the valve end of line.
5. Discard the O-ring seals (1).

Scheme 109

Scheme 110

Scheme 111

1. Inspect the cylinder lines (1) for the following items: Cracks Dents Damage to the threads
2. Replace the parts as needed. IMPORTANT: Carefully align the threads on all of the fittings. Finger tighten the fittings in order to avoid stripping and cross-threading the fittings.
3. Install the new O-ring seals (1) to the valve end of the cylinder lines. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices. IMPORTANT: Flush and bleed power steering system (hoses, reservoir and cooler lines) with power steering fluid GM P/N 1050017, (Canadian P/N 992646) or equivalent meeting GM Specification number 9985010. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/buick/century/vi-1997-2005/remont/manual-power-steering/#power-steering-system) .
4. Install the cylinder line assemblies (1) to the gear assembly (2). Tighten Tighten the valve end fittings to 16.9 N.m (12.6 lb ft). Tighten the cylinder end fittings to 27 N.m (20 lb ft).

Scheme 112

Scheme 113

1. Loosen both cylinder line fittings on the cylinder end of the gear assembly.
2. Loosen both fittings on the cylinder line assemblies (1) at the valve end of the gear assembly.
3. Remove both cylinder line assemblies (1) from the rack and pinion gear assembly (2).
4. Remove the O-ring seals (1) from the valve end of line.
5. Discard the O-ring seals (1).

Scheme 114

Scheme 115

Scheme 116

1. Inspect the cylinder lines (1) for the following items: Cracks Dents Damage to the threads
2. Replace the parts as needed.
3. Install the new O-ring seals (1) to the valve end of the cylinder lines. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the cylinder line assemblies (1) to the gear assembly (2). Tighten Tighten the valve end fittings to 17 N.m (13 lb ft). Tighten the cylinder end fittings to 27 N.m (20 lb ft).

The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.

The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir

1. Mounted to the front of the dash panel
2. Mounted to the inner fender
3. Mounted to a bracket on the engine The 2 basic types of power steering gears are listed below
4. A recirculating ball system
5. A rack and pinion system

In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.

In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.

The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.

The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.

In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.

Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to 1 side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. The rods transfer this force to the front wheels, which turn the vehicle right or left.

Scheme 117

Scheme 118

Scheme 119

See also:
• LIFTING AND JACKING THE VEHICLE
• UNDERHOOD ELECTRICAL CENTER OR JUNCTION BLOCK REPLACEMENT
• FASTENER NOTICE
• SYMPTOMS - POWER STEERING SYSTEM
• CHECKING AND ADDING POWER STEERING FLUID
• POWER STEERING PULLEY REPLACEMENT (3.8L)
• POWER STEERING PULLEY REPLACEMENT (3.1L)
• TIE ROD END REPLACEMENT - OUTER
• RACK AND PINION BOOT AND BREATHER TUBE REPLACEMENT - OFF VEHICLE