Malibu V6-191 3.1L VIN M SFI (1997)
Inspect:
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Stuck or inoperative flow control valve.
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Pressure plate not flat against cam ring.
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Extreme wear of cam ring.
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Scored pressure plate, thrust plate or rotor.
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Vanes sticking in rotor slots.
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Cracked or broken thrust or pressure plate.
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High internal leakage.
LOW PRESSURE DUE TO STEERING GEAR
Inspect:
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Scored housing bore.
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Leakage at seals.
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Leakage at piston ring.
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Air in system.
GROWLING NOISE IN STEERING PUMP
Inspect:
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Excessive back pressure in hoses or steering gear caused by restriction.
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Scored pressure plates, thrust plate or rotor.
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Hose or line grounding out.
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Worn cam ring.
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Low fluid level.
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Air in system.
GROANING NOISE IN STEERING PUMP
Inspect:
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Air in the fluid.
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Hose or line grounding out.
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Low fluid level.
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Pump mounting loose.
RATTLING NOISE IN STEERING PUMP
Inspect:
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Vanes sticking in rotor slots.
SWISHING NOISE IN STEERING PUMP
Inspect:
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Damaged flow control valve.
WHINING NOISE IN STEERING PUMP
Inspect:
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Scored pressure plates and vanes.
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Low fluid level.
STEERING VIBRATES (SHUDDERS) DURING LOW SPEED OR STATIC STEERING
Inspect:
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Air in system.
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Loose power steering belt.
