Quick summary
- When the system is low on fluid, air can be drawn in as the pump struggles to circulate the remaining fluid.
- If the return line becomes obstructed due to kinks, debris, or a clogged filter, it hinders the fluid’s return and creates a pressure imbalance that prevents air bubbles from escaping.
- By understanding the reasons why a power steering pump will not bleed air out of the system and implementing the appropriate troubleshooting measures, you can restore optimal steering performance and prevent potential component damage.
Air bubbles trapped within a power steering system can lead to a frustrating and potentially dangerous situation. When the pump fails to bleed air out of the system, it can result in diminished steering performance, increased noise, and even component failure. Understanding the reasons behind this stubborn air retention is crucial for resolving the issue and restoring optimal steering functionality.
1. Air Ingress: The Unwanted Guest
Air can enter the power steering system through various points, including loose fittings, damaged hoses, or a faulty reservoir cap. When the system is low on fluid, air can be drawn in as the pump struggles to circulate the remaining fluid.
2. Obstructed Return Line: A Throttle on Fluid Flow
The return line serves as a vital channel for the fluid to flow back to the reservoir. If the return line becomes obstructed due to kinks, debris, or a clogged filter, it hinders the fluid’s return and creates a pressure imbalance that prevents air bubbles from escaping.
3. Faulty Check Valve: A Broken Gatekeeper
The check valve located within the reservoir plays a crucial role in preventing fluid from flowing back into the pump. A malfunctioning check valve can allow fluid to leak back, creating a vacuum that draws air into the system.
4. Air in the Fluid: A Pre-Existing Problem
Sometimes, air can be introduced into the system during fluid replacement or when adding new fluid. If the fluid is not properly degassed or if air is inadvertently trapped during the filling process, it can lead to an air-bound system.
5. Leaking Components: A Path for Air to Enter
Damaged hoses, O-rings, or seals can create openings for air to enter the system. These leaks not only allow fluid to escape but also provide an easy entry point for air, exacerbating the air-bleeding issue.
6. Insufficient Fluid Level: A Critical Gap
When the power steering fluid level is low, it creates air pockets within the system. As the pump operates, these air pockets can circulate, leading to a spongy or unresponsive steering feel.
7. Worn or Damaged Pump: A Failing Heart
A worn or damaged power steering pump can lose its ability to generate sufficient pressure to expel air bubbles from the system. This can result in persistent air retention and diminished steering performance.
Troubleshooting and Resolution: Banishing the Air Bubble
To effectively resolve an air-bound power steering system, it is essential to identify the underlying cause and implement the appropriate solution. Here are some troubleshooting tips:
- Check for leaks: Inspect all hoses, fittings, and seals for signs of damage or leakage. Tighten any loose fittings and replace damaged components as necessary.
- Clean the return line: Remove any obstructions or debris from the return line. Use a compressed air hose to blow out any accumulated dirt or particles.
- Replace the check valve: If the check valve is faulty, replace it with a new one to prevent fluid backflow and air ingress.
- Degas the fluid: Use a vacuum pump or a degassing kit to remove any air bubbles from the fluid before filling the reservoir.
- Fill the reservoir correctly: Ensure the fluid level is at the correct level indicated on the dipstick. Avoid overfilling or underfilling the reservoir.
- Bleed the system: Follow the manufacturer’s recommended bleeding procedure to expel air from the system. This may involve turning the steering wheel back and forth with the engine running.
Takeaways: Steering Success, Air-Free
By understanding the reasons why a power steering pump will not bleed air out of the system and implementing the appropriate troubleshooting measures, you can restore optimal steering performance and prevent potential component damage. Remember, a well-maintained power steering system is essential for safe and responsive driving.
What You Need to Know
Q1: Can I bleed the power steering system myself?
A: Yes, bleeding the power steering system is a relatively straightforward procedure that can be performed at home. However, it is important to follow the manufacturer’s recommended steps and use the correct tools and equipment.
Q2: How often should I bleed the power steering system?
A: Typically, bleeding the power steering system is only necessary when air has entered the system due to a leak, fluid replacement, or component replacement. If you experience any symptoms of an air-bound system, such as spongy steering or increased noise, it is recommended to bleed the system.
Q3: What are the potential consequences of not bleeding the power steering system?
A: An air-bound power steering system can lead to a number of problems, including reduced steering performance, increased wear on components, and potential component failure. It is crucial to bleed the system properly to prevent these issues.
