Introduction:
The question, "Can you put brake fluid in the power steering?" has a resounding and unequivocal answer: No, absolutely not. Mixing brake fluid and power steering fluid is a recipe for disaster, leading to significant damage and costly repairs. This article will delve into the reasons why this is such a bad idea, explaining the differences between these two fluids and the consequences of their unintended interaction. We'll also explore what happens if you accidentally do mix them and the steps you need to take to rectify the situation. Understanding the distinct properties of each fluid is crucial for maintaining the health of your vehicle's systems.
Understanding Brake Fluid and Power Steering Fluid
The fundamental differences between brake fluid and power steering fluid are vast, making them incompatible for use in each other's systems.
Brake Fluid: The Stopping Power
Brake fluid is a hygroscopic fluid, meaning it absorbs moisture from the air. This is a crucial property for its function in the braking system, but it's also a significant drawback when considering its use elsewhere. Brake fluid's primary role is to transfer pressure from the brake pedal to the calipers or wheel cylinders, stopping the vehicle. It is formulated to withstand high temperatures generated during braking. Common types include DOT 3, DOT 4, and DOT 5.1. Crucially, DOT 5 is silicone-based and should never be mixed with other types.
Power Steering Fluid: Smooth Steering
Power steering fluid, on the other hand, is designed to lubricate and hydraulically assist the steering system. It's typically less viscous than brake fluid and formulated to minimize friction and ensure smooth operation of the steering components. Different vehicles require different types of power steering fluid, sometimes specified by color (e.g., red, green). Check your owner's manual for the correct type for your specific vehicle.
Key Differences Summarized:
| Feature | Brake Fluid | Power Steering Fluid |
|---|---|---|
| Primary Function | Hydraulic braking | Hydraulic steering assistance |
| Viscosity | High | Relatively low |
| Hygroscopic | Yes | No |
| Heat Resistance | High | Moderate |
| Compatibility | Within DOT types (except DOT 5) | Varies by vehicle; check manual |
The Dangers of Mixing Brake Fluid and Power Steering Fluid
Mixing these two fluids can cause a cascade of problems, some immediate and some developing over time.
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Sealing Damage: Brake fluid's aggressive nature can attack the seals and other rubber components within the power steering system. This leads to leaks, reduced power steering assist, and potentially complete system failure.
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Corrosion: Brake fluid is highly corrosive to certain metals. Its presence in the power steering system can lead to corrosion of metal components, causing further damage and malfunction.
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System Contamination: Even a small amount of brake fluid can contaminate the entire power steering system, requiring a complete flush and refill to restore proper functionality. This is an expensive repair.
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Reduced Lubrication: Brake fluid's properties are not conducive to proper lubrication of power steering components. This leads to increased wear and tear and a shortened lifespan for the power steering pump and other components.
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Pump Failure: The power steering pump is particularly vulnerable. The corrosive nature of brake fluid can damage the pump seals and bearings, leading to failure and the need for a costly replacement.
What to Do If You Accidentally Mixed the Fluids
If, by mistake, you've added brake fluid to the power steering system, immediate action is crucial.
- Stop immediately: Do not attempt to drive the vehicle.
- Consult a mechanic: A professional mechanic is the best resource to assess the damage and recommend the necessary repairs.
- Do not attempt to flush the system yourself: Improper flushing can lead to further damage.
- Prepare for significant repairs: Complete flushing, replacement of damaged seals and components, and possibly a new power steering pump will likely be necessary. This is a costly repair.
Conclusion: Prevention is Key
The consequences of mixing brake fluid and power steering fluid are severe and costly. Always double-check before adding any fluid to your vehicle's systems. Carefully read the labels on fluid containers and consult your owner's manual for specific fluid recommendations. Prevention is far more economical and less stressful than dealing with the aftermath of a costly mistake. Remember, preventing the mix-up is far easier than repairing the ensuing damage.