Power steering is shot..
07-07-2009, 12:35 PM
#1
Staging Lane
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Power steering is shot..
Hey guys, Well I have a 2003 5.3L RCSB Z71 Silverado with H/C/N... My power steering took a dump a few days ago. I really need to fix it, I'm just curious on what tools its going to take to remove it.. Do I have to discharge the Freon in the compressor? Do any of you all know the steps on removing and replacing my power steering pump? I'd appreciate you all help. Thanks.
07-07-2009, 01:22 PM
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Doesn't look too tough, per GMSI...
Power Steering Pump Replacement 4.8L, 5.3L and 6.0L
Removal Procedure
Remove the power steering pulley.
Raise the vehicle.
Remove the oil pan skid plate bolts.
Remove the oil pan skid plate from the vehicle, if equipped.
Place a drain pan under the vehicle.
Remove the power steering pressure hose from the power steering pump from underneath the vehicle.
Lower the vehicle.
Remove the clamps retaining the power steering return hoses to the power steering pump and remove the hoses.
Remove the lower intermediate shaft from the steering gear.
Remove the bolt retaining the rear bracket to the engine.
Remove the bolts from the front of the pump.
Remove the pump from the vehicle.
Remove the bracket from the rear of the pump.
Installation Procedure
Install the bracket to the rear of the pump.
Tighten the rear bracket retaining nuts to 50 N·m (37 lb ft).
Install the power steering pump.
Install the bolt retaining the rear bracket to the engine.
Tighten the rear power steering bracket bolt to engine bracket to 50 N·m (37 lb ft).
Install the bolts to the front of the pump.
Tighten the bolts to 50 N·m (37 lb ft).
Install the power steering pump return hoses to the power steering pump and install the retaining clamps.
Raise the vehicle.
Install the power steering pressure hose to the power steering pump.
Tighten the fitting to 28 N·m (20 lb ft).
Install the oil pan skid plate, if equipped.
Install the oil pan skid plate bolts.
Tighten the retaining bolts to 20 N·m (15 lb ft).
Lower the vehicle.
Install the intermediate shaft.
Install the power steering pulley.
Fill and bleed the power steering system.
Power Steering Pump Replacement 4.8L, 5.3L and 6.0L
Removal Procedure
Remove the power steering pulley.
Raise the vehicle.
Remove the oil pan skid plate bolts.
Remove the oil pan skid plate from the vehicle, if equipped.
Place a drain pan under the vehicle.
Remove the power steering pressure hose from the power steering pump from underneath the vehicle.
Lower the vehicle.
Remove the clamps retaining the power steering return hoses to the power steering pump and remove the hoses.
Remove the lower intermediate shaft from the steering gear.
Remove the bolt retaining the rear bracket to the engine.
Remove the bolts from the front of the pump.
Remove the pump from the vehicle.
Remove the bracket from the rear of the pump.
Installation Procedure
Install the bracket to the rear of the pump.
Tighten the rear bracket retaining nuts to 50 N·m (37 lb ft).
Install the power steering pump.
Install the bolt retaining the rear bracket to the engine.
Tighten the rear power steering bracket bolt to engine bracket to 50 N·m (37 lb ft).
Install the bolts to the front of the pump.
Tighten the bolts to 50 N·m (37 lb ft).
Install the power steering pump return hoses to the power steering pump and install the retaining clamps.
Raise the vehicle.
Install the power steering pressure hose to the power steering pump.
Tighten the fitting to 28 N·m (20 lb ft).
Install the oil pan skid plate, if equipped.
Install the oil pan skid plate bolts.
Tighten the retaining bolts to 20 N·m (15 lb ft).
Lower the vehicle.
Install the intermediate shaft.
Install the power steering pulley.
Fill and bleed the power steering system.
07-07-2009, 02:22 PM
#4
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No prob. Forgot to mention that it would be best to flush all the old fluid out of the system before hooking the return line up to the new pump, just in case there is any crap in there that would damage the new pump.
07-07-2009, 02:29 PM
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Flushing the Power Steering System
Important
Do not reuse any drained power steering fluid regardless of appearance or condition.
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 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
Important
Do not reuse any drained power steering fluid regardless of appearance or condition.
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 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
07-07-2009, 02:34 PM
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Not sure if this is really necessary or not(?)
Bleeding the Power Steering System
* Tools Required J 35555 Metal Mityvac
* J 43485 Power Steering Bleeder Adapter
Important
Hoses touching the frame, body, or engine may cause system noise.
1. Verify that the hoses do not touch any other part of the vehicle.
Important
Loose connections may not leak, but could allow air into the steering system.
2. Verify that all hose connections are tight.
Object Number: 443644 Size: SH
Click here for detailed picture of above image.
Notice
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.
Important
Maintain the fluid level throughout the bleed procedure.
3. Remove the pump reservoir cap.
Important
Use clean, new power steering fluid only.
4. Fill the pump reservoir with fluid to the FULL COLD level.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
5. Attach the J 43485 to the J 35555 or equivalent.
6. Place the J 43485 on or in the pump reservoir filler neck.
7. Apply a vacuum of 68 kPa (20 in Hg) maximum.
8. Wait 5 minutes.
9. 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. Remove the J 43485 and the J 35555 .
10. Reinstall the pump reservoir cap.
11. Start the engine. Allow the engine to idle.
12. Turn off the engine.
13. Verify the fluid level. Repeat steps 11-13 until the fluid stabilizes.
Important
Do not turn steering wheel to lock.
14. Start the engine. Allow the engine to idle.
15. Turn the steering wheel 180-360 degrees in both directions 5 times.
16. Switch the ignition off.
Notice
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.
17. Verify the fluid level.
Object Number: 443644 Size: SH
Click here for detailed picture of above image.
18. Remove the pump reservoir cap.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
19. Attach the J 43485 to the J 35555 or equivalent.
20. Place the J 43485 on or in the pump reservoir filler neck.
21. Apply a vacuum of 68 kPa (20 in Hg) maximum.
22. Wait 5 minutes.
23. Remove the J 43485 and the J 35555 .
24. Verify the fluid level.
Object Number: 443656 Size: SH
Click here for detailed picture of above image.
25. Reinstall the pump reservoir cap.
Excessive Vacuum Drop Diagnosis
Object Number: 443667 Size: SH
Click here for detailed picture of above image.
1. If the vacuum continues to drop, remove the pressure and return hose from the pump.
2. Install the plugs (1,2) supplied with the J 43485 into the pressure and return port.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
3. Attach the J 43485 to the J 35555 or equivalent.
4. Place the 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 the pressure hose.
Fluid must be free from discoloration.
7. Observe the fluid.
8. If 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 vehicle on a smooth flat surface.
11. Verify the following conditions:
* There is smooth power assist.
* The vehicle operates quietly.
* The pump maintains the proper fluid level.
* There is not any leaking in the steering system.
* The fluid is free of foam or discoloration.
Bleeding the Power Steering System
* Tools Required J 35555 Metal Mityvac
* J 43485 Power Steering Bleeder Adapter
Important
Hoses touching the frame, body, or engine may cause system noise.
1. Verify that the hoses do not touch any other part of the vehicle.
Important
Loose connections may not leak, but could allow air into the steering system.
2. Verify that all hose connections are tight.
Object Number: 443644 Size: SH
Click here for detailed picture of above image.
Notice
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.
Important
Maintain the fluid level throughout the bleed procedure.
3. Remove the pump reservoir cap.
Important
Use clean, new power steering fluid only.
4. Fill the pump reservoir with fluid to the FULL COLD level.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
5. Attach the J 43485 to the J 35555 or equivalent.
6. Place the J 43485 on or in the pump reservoir filler neck.
7. Apply a vacuum of 68 kPa (20 in Hg) maximum.
8. Wait 5 minutes.
9. 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. Remove the J 43485 and the J 35555 .
10. Reinstall the pump reservoir cap.
11. Start the engine. Allow the engine to idle.
12. Turn off the engine.
13. Verify the fluid level. Repeat steps 11-13 until the fluid stabilizes.
Important
Do not turn steering wheel to lock.
14. Start the engine. Allow the engine to idle.
15. Turn the steering wheel 180-360 degrees in both directions 5 times.
16. Switch the ignition off.
Notice
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.
17. Verify the fluid level.
Object Number: 443644 Size: SH
Click here for detailed picture of above image.
18. Remove the pump reservoir cap.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
19. Attach the J 43485 to the J 35555 or equivalent.
20. Place the J 43485 on or in the pump reservoir filler neck.
21. Apply a vacuum of 68 kPa (20 in Hg) maximum.
22. Wait 5 minutes.
23. Remove the J 43485 and the J 35555 .
24. Verify the fluid level.
Object Number: 443656 Size: SH
Click here for detailed picture of above image.
25. Reinstall the pump reservoir cap.
Excessive Vacuum Drop Diagnosis
Object Number: 443667 Size: SH
Click here for detailed picture of above image.
1. If the vacuum continues to drop, remove the pressure and return hose from the pump.
2. Install the plugs (1,2) supplied with the J 43485 into the pressure and return port.
Object Number: 443646 Size: SH
Click here for detailed picture of above image.
3. Attach the J 43485 to the J 35555 or equivalent.
4. Place the 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 the pressure hose.
Fluid must be free from discoloration.
7. Observe the fluid.
8. If 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 vehicle on a smooth flat surface.
11. Verify the following conditions:
* There is smooth power assist.
* The vehicle operates quietly.
* The pump maintains the proper fluid level.
* There is not any leaking in the steering system.
* The fluid is free of foam or discoloration.
