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ACDelco Professional Remanufactured Power Steering Pumps effectively provide the hydraulic force required for power-assisted steering systems. Each Professional, premium aftermarket pump includes applicable installation instructions and an installation kit with O-rings and pulley assembly kit when needed. Remanufacturing power steering pumps is an industry-standard practice that involves disassembly of existing units and replacing components that are most prone to wear and failure with new components. Damaged and obsolete parts are replaced and are 100 percent end-of-line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. These Power Steering Pumps are manufactured to fit a wide range of vehicles and will provide the same performance, durability and service life you expect from ACDelco.


  • All components are closely inspected and validated to meet the strictest quality standards to improve part durability
  • Multiple cleaning and washing stations, with regular contamination audits, for every component inside the pump minimize internal contamination and increase part service life
  • Housing is cleaned and inspected at multiple stages in the manufacturing process to minimize corrosion and rust prior to component assembly
  • Seals and O-rings are replaced with new parts for extended life and reliability
  • Sealing surfaces are polished, restored, and checked for microfinish. This helps ensure maximum sealing to minimize leaks
  • Assembled units are 100 percent functionally tested for leak-free performance, prior to packaging, to help guarantee unit performance that meets vehicle specifications
  • High-temperature seals are utilized for durability and reliability
  • Cam packs closely are inspected for any wear or imperfections and replaced with new when needed
  • Input shaft seal surfaces are micro-finished for precise fit and leak-free performance


Did You Know?

Power steering is really “power-assisted" steering. It allows you to steer your vehicle manually when the engine is not running or if a failure occurs in the power source. Over the years, power steering has become standard on many vehicles. In fact, consumer demand for this system has resulted in it being used in more than 90% of all new cars produced in the U.S. and Canada.

Signs of Wear & Troubleshooting:

  • Excessive noise, no power assist and leaks are some of the most common reasons for power steering pump replacement.
  • When present, contaminants are likely to spread through the entire steering system.
  • Contamination can affect the pressure relief valve, resulting in premature relief or a lack of assist before the end of a complete steer. It can also be present in the flow-control orifice, which may result in reduced flow due to partial blockage. This usually leads to increased effort while steering. Contamination may also affect the flow-control feedback loop, causing an inability to regulate flow.
  • Leaks at the shaft seal and the reservoir O-ring seal will allow contamination. A leak at an internal O-ring seal will not allow the pump to build pressure.
  • Gear leaks at the upper and lower pinion seals and the inner and outer bulkheads may allow contamination. An internal leak at the valve assembly or the rack piston will not allow the pump to build pressure.
  • Mechanical wear on the valve bore can cause the flow control valve to stick.
  • Mechanical wear on the pressure/thrust plate can cause a decrease in efficiency and even cause the system to seize.
  • Because of the interconnected design of the gears and pump, it is often difficult to evaluate the performance of each separately. For example, it is often difficult to differentiate an inefficient pump from a leaking gear. Often, the repair process will center on the component that is easiest to replace, usually the pump.
  • Sometimes the end result is to replace the entire system while attempting to correct the problem. To make matters worse, some steering system problems, such as a glazed or slipping belt, are not directly related to either the pump or the gear.
  • The key is to diagnose the problem correctly using the best method available – manual diagnosis by a qualified technician is always the preferred method.


Good Maintenance Practices:

  • Check power steering fluid levels periodically and add fluid when necessary.
  • Have your vehicle inspected if it exhibits any of the following symptoms: unusual noise when turning the steering wheel, a shimmy or shake in the steering wheel, heavy or unresponsive steering at low speeds or during parking lot maneuvers and/or the steering wheel does not return to center properly.
  • If you live in areas that experience harsh winter weather, have the entire steering system inspected before winter arrives to help ensure safer driving.
  • It is a good idea to replace O-rings when doing any steering system service. Reusing old O-rings can cause leaks.
  • Always check the specific manufacturer’s service information for the correct power steering fluid to use. Different fluids are specified by the manufacturers to meet the operating requirements of their power steering systems. On some modern steering systems, brake fluids or transmission fluids may not be compatible with pump components. Using the wrong fluid could cause hose and seal damage as well as fluid leaks.
  • Keep in mind that regardless of the original color of new power steering fluid, all fluids will darken in color during use. Fluid color is not an indication of fluid condition.
  • After any service of the power steering system, always bleed the air from the system and verify proper system operation. An accurate fluid level cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise as well as pump damage over a period of time.
  • The most significant root causes of power steering failures that could lead to pump replacement are system contamination, improper pulley installation, and using the wrong fluid. Following the recommended service procedures during power steering pump replacement addresses these root causes and helps ensure the longevity of the new power steering pump while reducing the chances of premature pump failure.
  • Flushing the system will help eliminate any residual contaminants from causing future pump failure. Dirty or contaminated fluid may cause low or no pressure from the power steering pump, causing the relief valve to stop functioning.
  • Always follow the manufacturer’s specific instructions on flushing, but remember the following: Always flush out the power steering fluid in the lines before removing the old pump and be ready with two or more quarts of power steering fluid for the flushing process.



Do I need to change my power steering fluid regularly, even if there are no symptoms of problems with the system?

  • No. It is not necessary to regularly check power steering fluid unless there is a leak suspected in the system or an unusual noise is heard. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. Always reference your vehicle’s service information for appropriate maintenance intervals.

Will I be unable to steer my vehicle if my power steering goes out?

  • No. You will be able to steer your vehicle if the power steering goes out, but it will require more effort, especially at lower speeds. If your power steering goes out, have the system inspected and repaired as soon as possible.

Should my power steering system be flushed every time it undergoes maintenance or component replacement?

  • Yes. The power steering fluid should be flushed whenever a component is being replaced or the system has become contaminated.

Can using the incorrect power steering fluid cause damage to my power steering system?

  • Yes. Use of the incorrect fluid may damage the vehicle, and the damages may not be covered by the vehicle or component’s warranty. Always use the correct fluid listed in the manufacturer’s service literature.

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