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What causes the power steering pump to make noise?

2 Answers

Chris

08/29/25 3:36am

Power steering pump noise is largely caused by internal friction due to insufficient oil. It is necessary to check the fluid level in the reservoir. If it is below the minimum mark, power steering fluid should be added until the level reaches the maximum mark (MAX). Power Steering Fluid: Power steering fluid is a special liquid used in the car's power steering pump. Through hydraulic action, it makes the steering wheel very light to operate, similar to automatic transmission fluid, brake fluid, and shock absorber fluid. Precautions for replacing power steering fluid: Power steering fluid contains carcinogens. If it comes into contact with the skin, it should be washed off immediately. Power steering fluid is corrosive and can cause paint to lose its luster and rubber parts to age. If contaminated, it should be cleaned promptly. For cars equipped with hydraulic power steering systems, avoid turning the steering wheel to the extreme left or right for extended periods, as this can burn out the power steering pump.

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Mark

09/10/25 8:16am

Having driven for so long, I've seen plenty of cases where the power steering pump makes noise. It's usually due to insufficient power steering fluid or air bubbles in the fluid. Low fluid levels can cause the pump to run dry, producing a whining or squealing sound. A loose belt might also lead to a slipping noise. If the pump itself is worn out or the bearings are damaged, it can result in a humming sound. Air in the system can cause a gurgling noise. Leaking fluid that becomes dirty can also accelerate wear. I remember one time my car kept making noise, and it turned out the reservoir was leaking—topping it up with fresh fluid fixed the issue. If you delay repairs, the steering will become increasingly heavy, and you might lose control at high speeds. I recommend checking the fluid level and belt first. If that doesn’t help, take it to a professional shop to replace the fluid or the pump—don’t skimp on safety. Regular maintenance with genuine fluid can reduce the chances of unusual noises.

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