How to Install a Power Steering Pump on Your Subaru 2.5: DIY Guide for Car Enthusiasts

If you’re a car owner looking to install a power steering pump on your Subaru 2.5, this DIY guide is for you. Installing a power steering pump can be intimidating, especially if you’re not familiar with car mechanics. However, following these easy step-by-step instructions with all the necessary precautions and tips will make the process much easier to handle.

The Basics: What is a Power Steering Pump and What Does it Do?

A power steering pump is an important component found in the power steering system of your car. Its main function is to provide hydraulic fluid to the power steering gearbox, which helps to amplify your steering effort, making it easier to steer your car. Without this pump, steering your car would be extremely difficult, especially at low speeds.

Tools and Parts Required for the Installation

Before jumping straight into the installation process, ensure that you have all the necessary tools and parts on hand. Here’s a list of everything you’ll need:

  • Power steering pump for Subaru 2.5
  • New power steering fluid (Recommended: Subaru OEM ATF-HP)
  • Socket wrench
  • Socket set
  • Pliers
  • Jack and jack stands
  • Protective gloves
  • Safety glasses
  • Bucket/draining pan
  • Rag or towels

Step-by-Step Guide for Installing a Power Steering Pump on a Subaru 2.5

Now, let’s get started with the actual installation process. Follow these step-by-step instructions carefully and take all necessary precautions to ensure a safe and successful installation.

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Step 1: Disconnect the Negative Battery Cable

Before you start working on your car, it’s always important to disconnect the negative battery cable to avoid any electrical hazards.

Step 2: Remove the Power Steering Pump Pulley

Please be cautious with this step as you will require the power steering pulley remover tool to remove the pulley carefully. It’s important not to damage the pulley when removing it. It’s best to refer to your car’s service manual for instructions on how to remove the pulley.

Step 3: Remove the Power Steering Pump

Now, locate the power steering pump on your car. It is typically located on the passenger side, in front of the engine. Carefully remove the steering pump using a socket wrench.

Step 4: Drain the Old Power Steering Fluid

Place a bucket or draining pan underneath the power steering pump to catch any dripping fluid. Carefully remove the power steering fluid reservoir cap and drain the old fluid into the pan.

Step 5: Install the New Power Steering Pump

Now that the old power steering pump is removed, install the new power steering pump in its place. Use a socket wrench to mount the pump in the same position as the old one.

Step 6: Reconnect the Power Steering Pump Pulley

Follow the instructions provided with your pulley remover tool and install the power steering pump pulley with caution.

Step 7: Refill the Power Steering Fluid

Once the new pump is installed, fill the power steering fluid reservoir with new power steering fluid. Take note of the recommended ATF-HP by the Subaru OEM.

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Step 8: Test the New Power Steering Pump

Start your car and turn the steering wheel to check if the power steering system is working as it should. Listen for any unusual noises and monitor the function of the steering wheel for any stiffness.

Precautions and Safety Measures

Here are some safety measures to take when installing a power steering pump:

  • Always wear protective gloves and safety glasses when working on your car.
  • When lifting your car, make sure it’s on a flat and stable surface.
  • Never smoke around car fluids or when working on your car.
  • Always follow the instructions provided with your tools and parts.

Troubleshooting Common Issues

Here are some common issues you may encounter during the installation process:

  • Pulley removal issues
  • Power steering fluid leaks
  • Noise from the power steering pump
  • Improper functioning of the power steering system

If you experience any of these issues, refer to your car’s service manual or contact a professional mechanic for assistance.


Installing a power steering pump on your Subaru 2.5 can be challenging, but, by following these step-by-step instructions, you can do it yourself. Remember to take all the necessary precautions to ensure your safety, and always refer to your car’s service manual when in doubt.

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Peter Banks

With years of experience as a professional mechanic and Subaru specialist, Peter is one of the most respected members of our team. He's written several articles on Subaru maintenance and repair, and his advice and tips are always practical and helpful. When he's not working on cars, he enjoys cooking and trying out new recipes.

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