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What is a power steering pump reservoir and how does it work?
A power steering pump uses hydraulic pressure to make it easier for a driver to turn the steering wheel. Power steering is featured on nearly all vehicles today. Without power-assisted steering, turning the wheel would be very difficult, especially when traveling slowly, when stopped, or while parking. Although the automotive industry is beginning to see many late-model vehicles that feature electric-assist power steering systems, still the majority rely on hydraulic power. The power steering pump is the heart of the system, pressurizing the oil (power steering fluid) to exert force - up to 1000 psi in some vehicles - for steering assist. The power steering pump reservoir holds the hydraulic fluid to power the system.
HOW IS THIS SERVICE PERFORMED?
How is a a Power Steering Pump Reservoir Replacement done?
To replace a power steering pump reservoir, a mechanic will generally do the following (depending on the reservoir mounting location):
Use a syringe, baster, or pump to extract all of the hydraulic fluid from the reservoir
Unbolt and unseat the reservoir
Seat and fasten the new reservoir in its mounting location
Refill the reservoir with fresh power steering fluid
Bleed the steering system of any air that becomes trapped
Test drive your vehicle to verify the repair
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National average cost of a a Power Steering Pump Reservoir Replacement for popular vehicles:
Car Model
Avg. cost
$50
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How do I know if the power steering pump reservoir needs to be replaced?
The power steering pump reservoir is a container that holds the hydraulic fluid used in the steering system. Although it is related to the power steering pump, and may be mounted to the pump, it is often mounted remotely in a different part of the engine compartment. In any case, problems with the reservoir usually revolve around leaking power steering fluid. If you notice a fluid leak on, near, or underneath the reservoir location, the component might be bad. Certainly, if the reservoir is cracked or broken, it will need to be replaced. Other signs of a bad reservoir - occurring because of a low fluid level - include:
A growling, humming, or whining noise coming from under the hood, especially one that grows louder when you turn the steering wheel
Increased difficulty turning your vehicle
The smell of burnt oil
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Other questions customers ask
How do I fix a leaking power steering reservoir?
If you notice a leak coming from the power steering reservoir, you might consider checking for obvious minor problems, such as missing hose clamps or a loose cap. If the situation is more serious, a deteriorated or damaged hose or cracked reservoir, for instance, you should schedule an inspection by a qualified technician who can accurately diagnose the condition and make sure there are no other problems with your power steering system.
Can a power steering reservoir go bad?
Generally speaking, a power steering reservoir is unlikely to “go bad” on its own. Damage might occur as a result of excessive vibration, abrasion from another component that is misaligned, or a crash. Occasionally, a reservoir that is advanced in years might crack. And some have o-rings that might deteriorate and cause a leak.
How do you remove a reservoir from a power steering pump?
Some power steering pump reservoirs attached to the pump itself are serviceable. Others are not and require that the whole pump assembly be replaced if the reservoir goes bad. Replacement of the reservoir requires that a mechanic extract all of the power steering fluid, disconnect and unseat the reservoir, install the new component, refill with fresh fluid, and bleed the system. Whether or not the pump must be removed for access depends on the vehicle make and model.
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