Growl Noise in Steering Pump for Buick Century (China) (CNG) 1999

Excessive back pressure in the power steering hoses

1. Inspect the power steering hoses for restrictions. Refer to Power Steering System Test .
2. Repair the hoses, if necessary. Refer to Power Steering Pressure Pipe/Hose Replacement or Power Steering Return Hose Replacement .

Excessive back pressure in the power steering gear

1. Inspect the steering gear for restrictions. Refer to Power Steering System Test .
2. Repair the steering gear, if necessary. Refer to Steering Gear Replacement .

Scored pressure plate

1. Inspect the pressure plate for scores.
2. Replace the pressure plate, if necessary. Refer to Power Steering Pump Replacement .

Scored thrust plate

1. Inspect the thrust plate for scores.
2. Replace the thrust plate, if necessary. Refer to Power Steering Pump Replacement .

Scored rotor

1. Inspect the rotor for scores.
2. Replace the rotor, if necessary. Refer to Power Steering Pump Replacement .

Worn pump ring

1. Inspect the pump ring.
2. Replace the pump ring, if necessary. Refer to Power Steering Pump Replacement .