why does my Volvo XC90 make a whining noise when I turn the steering wheel

Solution

1. Preparation

• Gather all necessary tools and parts.
• Make sure the vehicle is on a level surface and the engine is off.
• Disconnect the negative battery terminal to ensure safety.

2. Check and Refill Power Steering Fluid

• Locate the power steering fluid reservoir.
• Remove the cap and check the fluid level; add the correct type of power steering fluid if low.
• Inspect the fluid condition; if it’s dirty or contaminated, it will need to be flushed.

3. Inspect and Replace Power Steering Pump (if necessary)

• Remove any components obstructing access to the power steering pump (such as the air intake duct).
• Disconnect the power steering hoses from the pump using a wrench.
• Unbolt the pump from its mounting bracket using a socket set (typically 10mm to 15mm bolts).
• Install the new pump by reversing the removal steps. Ensure all bolts are torqued to manufacturer specifications (refer to service manual for exact torque values).

4. Inspect and Replace Serpentine Belt (if necessary)

• Check the serpentine belt for any signs of wear or damage (cracks, fraying).
• If replacement is needed, note the routing of the belt before removal.
• Use a serpentine belt tool to relieve tension and remove the old belt.
• Install the new belt, ensuring it is properly aligned on all pulleys.

5. Refill and Bleed Power Steering System

• Refill the power steering reservoir with the recommended fluid.
• Start the engine and turn the steering wheel from lock to lock to bleed air from the system.
• Check the fluid level again and add more if necessary.