* Fluid on the Belt: The leaking power steering fluid is likely getting onto the serpentine belt. Power steering fluid is oily and acts as a lubricant, reducing the friction between the belt and the pulleys. This reduced friction allows the belt to slip and eventually come off, especially under load (like turning the steering wheel).
* Pulley Damage: The leaking fluid might also be contaminating and damaging the pulleys. Fluid buildup can cause the pulleys to become slippery, contributing to belt slippage and ultimately its dislodgement.
* Belt Degradation: Constant slippage and the oily residue weaken the belt material over time, making it more prone to failure and coming off.
Why the pump replacement didn't solve the problem:
Replacing the pump might have addressed a leak *from* the pump, but the problem likely lies *elsewhere* in the power steering system. The leak could be coming from:
* Hoses: Cracks or holes in the high-pressure or low-pressure power steering hoses are common culprits.
* Rack and Pinion: Leaks from the rack and pinion steering gear are also possible.
* Pressure Switch/Sensor: A less common source, but still possible.
* Fluid Reservoir: A crack or seal failure in the reservoir itself could be the source.
What to do:
1. Thoroughly inspect the entire power steering system: Carefully examine all hoses, connections, the rack and pinion, and the reservoir for leaks. Use a bright light and clean the area first for better visibility.
2. Pressure test the system: A mechanic can pressure test the power steering system to pinpoint the precise location of the leak. This is crucial for accurate diagnosis.
3. Replace faulty components: Once the leak source is identified, replace the damaged hoses, seals, or other parts.
4. Clean the belt and pulleys: After fixing the leak, thoroughly clean the serpentine belt and all pulleys with a degreaser to remove all traces of power steering fluid. A new belt might also be advisable.
Ignoring the leak will lead to further damage (more belt failures, possible steering failure) and potentially a much more expensive repair down the line. Getting the leak fixed promptly is essential.
