Tools You'll Likely Need:
* Wrench set (metric): Various sizes, including those for the pump mounting bolts, pulley nut, and lines.
* Socket set (metric): Similar to wrenches, for easier access in tight spots.
* Ratchet: To speed up the process.
* Torque wrench: Essential for tightening bolts to the correct specifications.
* Power steering fluid: The correct type for your Mustang (check your owner's manual). A new fluid reservoir might also be a good idea.
* Drain pan: To catch old fluid.
* Jack and jack stands: To safely lift the vehicle.
* Wheel chocks: For safety.
* Gloves: To protect your hands.
* Shop rags or paper towels: For cleaning.
* New power steering pump: Make sure you get the correct replacement pump for your specific engine.
* Possibly a pulley puller: Depending on the pump design, this might be necessary to remove the pulley.
* Open-end wrench or crescent wrench: Sometimes needed for awkward angles.
Procedure (General Steps - Consult Your Repair Manual for Specifics):
1. Safety First: Disconnect the negative battery terminal. Raise the vehicle securely using jack stands. Apply wheel chocks.
2. Drain Power Steering Fluid: Locate the power steering fluid reservoir and drain the fluid into a drain pan.
3. Disconnect Lines and Electrical Connections (if any): Carefully disconnect the high-pressure and low-pressure power steering hoses from the pump. Use a catch pan to minimize fluid spillage. Note the location of each hose to ensure correct reconnection. There might be an electrical connector; disconnect it if present.
4. Remove the Pulley: The pulley is usually held on by a large nut. Loosen and remove this nut. You may need a pulley puller to remove the pulley from the pump shaft.
5. Remove the Pump Mounting Bolts: Locate the bolts securing the power steering pump to the engine block. Remove these bolts.
6. Remove the Old Pump: The pump should now be free to remove.
7. Install the New Pump: Carefully install the new power steering pump, ensuring it's seated correctly. Replace the mounting bolts and tighten them to the correct torque specification (found in your repair manual).
8. Install the Pulley: Install the pulley onto the new pump shaft. Tighten the pulley nut to the correct torque specification.
9. Reconnect Lines and Electrical Connections: Carefully reconnect the high-pressure and low-pressure power steering hoses to the new pump. Double-check to make sure all connections are secure. Reconnect the electrical connector, if applicable.
10. Refill with Power Steering Fluid: Fill the power steering fluid reservoir with the correct type and amount of fluid (check your owner's manual).
11. Bleed the System (Important): Start the engine and turn the steering wheel fully left and right several times to bleed air from the system. Check the fluid level and add more as needed. Continue this process until no air bubbles are visible in the fluid reservoir.
12. Inspect for Leaks: Carefully inspect all connections for leaks.
13. Lower the Vehicle: Lower the vehicle to the ground.
14. Test Drive: Test drive the vehicle to ensure the power steering is functioning correctly.
Important Considerations:
* Fluid Type: Use the correct power steering fluid specified for your 1990 Mustang.
* Torque Specifications: Use a torque wrench and follow the torque specifications in your repair manual. Over-tightening can damage the pump or engine block.
* Leaks: Thoroughly check for leaks after installation.
* Professional Help: If you're not comfortable performing this repair yourself, take your car to a qualified mechanic.
This is a general guide, and the exact procedures might vary slightly depending on your specific 1990 Mustang model and engine. Always consult your repair manual for detailed instructions specific to your vehicle. Failing to do so could lead to damage or injury.
