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Power Steering Zip Noise

SYMPTOM CHART - POWER STEERING ZIP NOISE

Symptom Possible Sources Action
Power steering system zip noise-occurs when hydraulic fluid does not flow freely through the power steering pump supply hose from steering fluid reservoir to power steering pump causing cavitation at the pump. Zip is primarily a cold weather start-up phenomenon (below -10°C). High viscosity of power steering fluid at low temperature. Certain amount of noise level acceptable, not a safety critical item.
Aeration of the power steering fluid. Bleed the power steering system.  
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