Introduction

The How to take apart a evo 8 power steering pump is a high-performance vehicle known for its responsive handling and powerful turbocharged engine. One crucial component of the Evo 8’s steering system is the power steering pump, which ensures smooth and effortless steering. Over time, this pump may develop leaks, lose efficiency, or fail completely, requiring maintenance or replacement.

Disassembling the Evo 8 power steering pump is a delicate task that involves removing various seals, bearings, and internal components. Whether you’re rebuilding the pump or diagnosing an issue, understanding the correct disassembly process is essential to avoid damaging critical parts. This guide will walk you through the tools needed, preparation steps, and a detailed teardown process to help you successfully take apart your Evo 8 power steering pump.

Tools and Materials Needed

Before starting, gather the following tools and materials to ensure a smooth disassembly process:

• Socket set and ratchet (8mm, 10mm, 12mm, and 14mm sockets)
• Wrenches (for high-pressure hose fittings)
• Flathead and Phillips screwdrivers
• Pulley puller tool (essential for removing the power steering pulley)
• Needle-nose pliers (for removing retaining clips)
• Rubber mallet (to gently tap out components)
• Drain pan (to catch any remaining power steering fluid)
• Shop rags and gloves (to keep the area clean)
• New seals and O-rings (if rebuilding)
• Power steering fluid (for reassembly)

Having these tools on hand will help prevent delays during the teardown process and minimize the risk of damaging parts.

Step 1: Removing the Power Steering Pump from the Evo 8

To access and disassemble the power steering pump, you first need to remove it from the engine bay. Follow these steps carefully:

1. Disconnect the Battery – Before working on any part of the engine, disconnect the negative terminal to prevent accidental shorts.
2. Drain Power Steering Fluid – Locate the power steering reservoir, remove the cap, and use a syringe or turkey baster to drain as much fluid as possible.
3. Loosen the Drive Belt – Use a 14mm socket to release the tensioner and slide the serpentine belt off the power steering pump pulley.
4. Remove High-Pressure and Return Hoses – Use a wrench to disconnect the high-pressure hose from the pump, and use pliers to release the clamp on the return hose. Have a drain pan ready for any fluid spillage.
5. Unbolt the Power Steering Pump – Remove the mounting bolts (usually three or four) securing the pump to the engine bracket. Once all bolts are out, carefully lift the pump from the engine bay.

With the pump now removed, you can proceed with disassembly.

Step 2: Removing the Pulley and Front Housing

The pulley must be removed before accessing the internal components of the pump. This step requires precision to avoid damaging the shaft.

1. Secure the Pump in a Vise – If available, place the pump securely in a soft-jawed vise to prevent movement.
2. Use a Pulley Puller Tool – Attach the pulley puller to the pump pulley and slowly tighten the tool until the pulley is removed from the shaft. Avoid using excessive force, as this could bend or damage the pulley.
3. Remove the Front Housing Bolts – Using the appropriate socket, carefully remove the bolts holding the front housing in place.
4. Tap the Housing Loose – If the front housing doesn’t easily come off, use a rubber mallet to gently tap around the edges to free it.

With the pulley and front housing removed, the internal components of the pump are now accessible.

Step 3: Disassembling the Internal Components

The inside of the Evo 8 power steering pump consists of a rotor, vanes, and seals that control fluid pressure. Follow these steps to fully disassemble the pump:

1. Remove the Rotor and Vanes – Carefully lift out the rotor assembly and remove the vanes one by one. Keep them organized to ensure correct reassembly.
2. Take Out the Pressure Plate – Beneath the rotor, you’ll find a pressure plate that directs fluid flow. Remove it carefully.
3. Extract the Bearings and Shaft – Use a bearing puller if necessary to remove the shaft and bearings from the pump body. Be careful not to damage the shaft, as it is a critical component.
4. Check for Worn Seals and O-Rings – Examine all seals, O-rings, and gaskets. If you’re rebuilding the pump, replace any damaged or hardened seals with new ones.

At this point, the power steering pump is fully disassembled, and you can clean, inspect, and replace parts as needed.

Step 4: Cleaning and Inspection

Now that all the components are removed, it’s time to clean and inspect each part for wear or damage:

1. Use Brake Cleaner or Degreaser – Spray each component with a non-corrosive degreaser or brake cleaner to remove old fluid and dirt.
2. Inspect for Damage – Look for any scoring, cracks, or excessive wear on the rotor, vanes, and shaft. If any part is severely worn, replacement may be necessary.
3. Check the Bearings – If the shaft bearings feel rough or have play, replace them to ensure smooth operation.

Proper cleaning ensures that the pump functions efficiently when reassembled.

Step 5: Reassembly and Installation

Once all parts are cleaned and inspected, you can begin reassembling the pump in reverse order:

1. Install New Seals and O-Rings – If replacing seals, lubricate them with fresh power steering fluid before installation to prevent leaks.
2. Reassemble the Rotor and Vanes – Place the rotor and vanes back in their correct orientation inside the pump body.
3. Reinstall the Bearings and Shaft – Carefully press the bearings and shaft back into place, ensuring smooth rotation.
4. Secure the Front Housing – Bolt the front cover back onto the pump and tighten it evenly to prevent leaks.
5. Attach the Pulley – Use a pulley installer tool to press the pulley back onto the shaft. Avoid hammering it, as this can damage the pump.
6. Reinstall the Pump in the Vehicle – Follow the removal steps in reverse order, ensuring all hoses and belts are securely connected.

Once installed, refill the power steering reservoir, start the engine, and turn the steering wheel lock-to-lock several times to bleed any air from the system.

Conclusion

Taking apart an Evo 8 power steering pump requires patience and the right tools, but it is a manageable task with careful execution. By following the correct steps, you can successfully disassemble, inspect, and rebuild the pump for optimal performance. Whether you’re addressing leaks, replacing worn components, or upgrading the system, this guide ensures you complete the process efficiently and correctly. With a properly serviced power steering pump, your Evo 8 will maintain smooth and precise steering for years to come.