Where is the power steering pump located on a 1990 Lexus ES 250 how do you replace it?

On a 1990 Lexus ES 250, the power steering pump is typically located on the front of the engine, driven directly by the serpentine belt. It's usually near the alternator and other engine accessories. To be absolutely certain of its location, you should consult a repair manual specific to your 1990 Lexus ES 250. A Chilton's or Haynes manual would be a great resource. These manuals will have diagrams showing the exact location and will guide you through the replacement process.

Replacing the Power Steering Pump is NOT a simple job and requires mechanical aptitude and specialized tools. It involves several steps, and doing it incorrectly can lead to further damage or injury. Here's a general outline of the process, but I strongly recommend using a repair manual for detailed instructions and safety precautions:

1. Safety First: Disconnect the negative battery terminal. Support the vehicle securely on jack stands. Wear safety glasses and gloves.

2. Fluid Drainage: Drain the power steering fluid from the reservoir. You'll likely need a drain pan.

3. Belt Removal: Loosen and remove the serpentine belt. You'll need the correct size serpentine belt wrench or tools to do this safely.

4. Component Removal: This is where the repair manual becomes crucial. You'll need to remove various components (possibly hoses, brackets, pulleys) to access the power steering pump. You'll likely need various wrenches and sockets. Pay close attention to the order of removal and how things are connected. Take pictures as you go!

5. Pump Removal: Once access is gained, carefully remove the power steering pump. There will likely be bolts holding it in place.

6. Installation of the New Pump: Install the new power steering pump, ensuring it's correctly aligned and seated. Tighten the bolts to the manufacturer's specified torque.

7. Component Reinstallation: Reinstall all the components you removed in the reverse order, ensuring everything is securely fastened.

8. Belt Reinstallation: Reinstall the serpentine belt, ensuring proper alignment and tension.

9. Fluid Refill: Refill the power steering fluid reservoir with the correct type and amount of fluid (check your owner's manual).

10. Bleeding the System: You may need to bleed the power steering system to remove air bubbles. This usually involves turning the steering wheel lock to lock several times with the engine running.

11. Testing: Start the engine and check for leaks. Test the power steering operation.

Again, this is a simplified overview. Attempting this repair without a repair manual specific to your vehicle is highly discouraged. Improper installation can lead to damage to the pump, hoses, or other components, and even injury to yourself. If you lack experience with car repairs, it's best to take your vehicle to a qualified mechanic. The cost of professional repair may be less than the cost of damaging additional components due to an improper repair.