Power Steering System Leak Inspection

How are power steering leaks diagnosed?

Since most power steering issues will generate the same symptoms, it would be difficult to diagnose only one part, without understanding the condition of the whole system. When symptoms emerge, the power steering fluid is inspected, and topped off, and the condition, and tension of the power steering pump belt is noted. The system may need to be bled of air prior to diagnosis. Any leaks will become very obvious at that time, and mechanical failure of the power steering pump will be evident from noise, or a pressure gauge inserted into the power steering line. At that time, if no other issues are found, the steering rack or steering gearbox will be suspected of failure. Any dust boots and seals will be inspected for leaks. The rack and pinion gear set will be inspected for sounds typical of mechanical failure. This systematic approach will lead a technician to a diagnosis.

What will be the outcome of the power steering leak diagnosis?

Power steering leaks are corrected by replacing or rebuilding the leaking component. In some more fortunate circumstances, the power steering lines may simply become loose, and will be properly tightened to prevent leaking. In most other situations, the power steering fluid is drained, the defective component is removed, and a rebuilt or new component is installed. Once the system is reassembled, the power steering system is filled with power steering fluid, according to manufacturer specification. Finally, the system is bled of air, and the vehicle will be tested for leaks and other symptoms.

RepairPal Recommendations for power steering leaks

We recommend against any product that claims to stop leaks in the power steering system. These products contain sealants that will become contaminants as they cure in the power steering fluid and build up inside components that are only designed for power steering fluid. This can lead to failing power steering pumps and steering gears, and even cause additional leaks.

What to look out for with power steering leaks

Power steering components are subject to high pressure, high heat, and high speeds. Selecting parts that are built to meet or exceed OEM standards will help ensure the longevity of the power steering hydraulic system. Inferior parts tend to lead to repeated replacement.

Can I diagnose a power steering system leak myself?

Finding and diagnosing a power steering leak can be very easy, or very frustrating. The advanced DIY can generally find the leaking component, but for the most part, the issue will be a mystery. The engine fans can blow power steering around when it leaks, and a leaking pump may cover the reservoir, and lead to an incorrect diagnosis. In some instances, even professional technicians need to use an oil dye to detect the source of a leak. If the leak is not obvious, and the next step is changing parts, consider trusting a professional instead.