Skylark L4-144 2.4L DOHC VIN T SFI (1997)
This can be caused by air in the fluid, and loss of fluid due to internal pump leakage causing overflow. Check for leak and correct. Bleed the system.
Extremely cold temperatures will cause air bubbles in the system if the fluid level is low.
LOW PRESSURE DUE TO STEERING PUMP
Inspect the following:
^
Stuck or inoperative flow control valve.
^
Pressure plate not flat against cam ring.
^
Extreme wear of cam ring.
^
Scored pressure plate, thrust plate or rotor.
^
Vanes sticking in rotor slots.
^
Cracked or broken thrust or pressure plate.
^
High internal leakage.
LOW PRESSURE DUE TO STEERING GEAR
Inspect the following:
^
Air in fluid.
^
Scored housing bore.
^
Leakage at seals.
^
Leakage at piston ring.
GROWLING NOISE IN STEERING PUMP
Inspect the following:
^
Excessive back pressure in hoses or steering gear caused by restriction.
^
Scored pressure plates, thrust plate or rotor.
^
Hose or line grounding out.
^
Worn cam ring.
^
Low fluid level.
GROANING NOISE IN STEERING PUMP
Inspect the following:
^
Air in the fluid.
^
Hose or line grounding out.
^
Low fluid level.
^
Pump mounting loose.
RATTLING NOISE IN STEERING PUMP
Inspect the following:
^
Vanes sticking in rotor slots.
SWISHING NOISE IN STEERING PUMP
Inspect the following:
^
Damaged flow control valve.
WHINING NOISE IN STEERING PUMP
Inspect the following:
^
Scored pressure plates and vanes.
^
Low fluid level.
^
Air in system.
Power Steering Pump Diagnosis
FOAMING, MILKY POWER STEERING FLUID, LOW FLUID LEVEL, POSSIBLE LOW PRESSURE AND/OR ABNORMAL NOISE
This can be caused by air in the fluid, and loss of fluid due to internal pump leakage causing overflow. Check for leak and correct. Bleed the system.
Extremely cold temperatures will cause air bubbles in the system if the fluid level is low.
LOW PRESSURE DUE TO STEERING PUMP
Inspect the following:
^
Stuck or inoperative flow control valve.
^
Pressure plate not flat against cam ring.
^
Extreme wear of cam ring.
^
Scored pressure plate, thrust plate or rotor.
^
Vanes sticking in rotor slots.
^
Cracked or broken thrust or pressure plate.
^
High internal leakage.
LOW PRESSURE DUE TO STEERING GEAR
Inspect the following:
