Diagnostic Information And Procedures; Hissing Noise In Steering Gear; Rattle In Rack And Pinion; Power Steering Gear And Pump Leaks - GMC chervolet camaro 1999 Service Manual

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Steering Power Steering System 2-7
Diagnostic Information and Procedures
Hissing Noise In Steering Gear
Problem Action
DEFINITION:
A hissing noise is commonly heard when the steering wheel is turned and the vehicle is not moving. The noise especially
noticeable if the brakes are applied. A replacement gear will also have a slight noise, and is not always a cure for
the condition.
There is a hissing noise in the
• Inspect for loose intermediate steering shaft universal joints.
steering gear.
• If the noise is very objectionable, replace the steering gear.
Rattle in Rack and Pinion
Problem Action
There is a rattling noise.
Inspect for the following conditions:
• Contact between the outlet (pressure) hose and the frame
• Loose tie rod ends
• Loose steering gear attachment
• A loose pinion shaft
A rattling noise occurs when driving Inspect the front brake linings for the following conditions:
over bumps.
• A loose fit
• Missing antirattle clips
Power Steering Gear and Pump Leaks External Leakage Check
• Determine if any of the following conditions exist:
- The vehicle leaks fluid onto the garage floor.
- Fluid leaks are visible on the steering
gear or the pump.
Use this procedure in order to help identify the exact
location of a leak. Some leaks can be easily located, but
seepage type leaks may be more difficult to locate. To
locate seepage leaks use the following method:
- There is a growling noise when you are
parking the vehicle.
- There is a growling noise when the
engine is cold.
- The power steering does not operate
when you are parking the vehicle.
- The vehicle requires excessive
steering effort.
• Inspect for an overfilled power steering
fluid reservoir.
• Inspect for fluid aeration and overt:low.
• Inspect the hose connections.
• Identify the exact point of system leakage.
Refer to External Leakage Check.
The point from which fluid is dripping is not
necessarily the point where the system is
leaking from.
1. Turn the engine off.
2. Wipe the complete power steering system dry.
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3. On vehicles with a 3800 engine, inspect the fluid
level in the power steering fluid reservoir (1).
Adjust the fluid level as necessary.