Can Brake Fluid Be Used in Power Steering? A Definitive No!
The short answer is a resounding no. Using brake fluid in your power steering system is incredibly dangerous and will likely cause significant and costly damage. While both fluids are liquids under pressure, they are fundamentally different and incompatible. This article will delve into the reasons why mixing them is a recipe for disaster.
Understanding the Differences Between Brake Fluid and Power Steering Fluid
Brake fluid and power steering fluid serve completely different purposes and have distinct chemical compositions. This difference is crucial to understanding why substitution is never acceptable.
Brake Fluid:
- Hydroscopic: This means it readily absorbs moisture from the air. Moisture in brake fluid significantly reduces its boiling point, leading to brake failure in extreme conditions.
- High Boiling Point: Necessary to withstand the extreme heat generated during braking.
- Aggressive Solvent: Brake fluid is designed to clean and lubricate brake components, but it's also highly corrosive to many materials.
Power Steering Fluid:
- Hydrophobic: It repels moisture to maintain its lubricating properties.
- Lower Boiling Point: Lower temperatures are acceptable as the system doesn't experience the same intense heat as brakes.
- Lubricant Focus: Primarily designed for lubrication and hydraulic functionality, not cleaning. It also protects seals and other components within the power steering system.
The Consequences of Using Brake Fluid in Power Steering
Mixing these fluids can lead to a cascade of negative effects:
- Seal Damage: Brake fluid's aggressive solvent properties will attack the rubber seals and hoses within the power steering system, causing them to swell, crack, or completely fail. This will lead to leaks and ultimately power steering failure.
- System Corrosion: Brake fluid's corrosive nature will eat away at metal components within the power steering pump and other parts of the system, causing premature wear and eventual failure.
- Pump Failure: The power steering pump is particularly vulnerable to the damaging effects of brake fluid. The fluid can cause the pump to seize, requiring a costly replacement.
- Fluid Incompatibility: The different chemical compositions mean the two fluids won't mix properly. This can lead to sludge formation, clogging critical passages, and ultimately catastrophic failure.
What to Do if You Suspect Contamination
If you suspect brake fluid has accidentally entered your power steering system, immediate action is critical. Do not attempt to drive the vehicle. You should contact a qualified mechanic immediately. They will need to flush the entire power steering system, replacing all contaminated fluid and potentially damaged components. This is a significant repair and can be expensive.
Conclusion
Using brake fluid in a power steering system is a dangerous and costly mistake that should be avoided at all costs. Always use the correct fluid specified by your vehicle's manufacturer. Referring to your owner's manual will ensure you use the appropriate power steering fluid for your vehicle. Taking preventative measures, such as regular fluid checks and prompt maintenance, will keep your power steering system functioning correctly and safely.
