Never Mix Brake Fluid and Power Steering Fluid: A Critical Guide
Putting brake fluid in your power steering system is a serious mistake that can lead to catastrophic damage and expensive repairs. This article explains why this is so dangerous and what you should do if it happens.
Why You Should Never Mix Brake Fluid and Power Steering Fluid
Brake fluid and power steering fluid are chemically incompatible. They have completely different compositions and functionalities. Brake fluid is designed to withstand high temperatures and pressures within the braking system. Power steering fluid, on the other hand, is formulated to lubricate and protect the power steering pump and components.
Mixing these fluids can cause several devastating problems:
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Corrosion: Brake fluid is hygroscopic, meaning it readily absorbs moisture from the air. This moisture, along with the chemical incompatibility, can cause rapid corrosion of the power steering system's rubber seals, hoses, and metal components. This corrosion can lead to leaks, failures, and ultimately, complete system failure.
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Damage to Seals and Components: The aggressive nature of brake fluid can quickly degrade the rubber seals and O-rings within the power steering system. This leads to leaks, reduced steering assist, and potentially complete loss of power steering. The fluid can also damage or destroy the power steering pump itself.
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System Failure: The combined effects of corrosion and seal damage will ultimately lead to power steering system failure. This results in extremely difficult and potentially dangerous steering, especially at low speeds or during maneuvers. Loss of power steering can make it incredibly challenging to control your vehicle.
What to Do if Brake Fluid Has Entered the Power Steering System
If, by mistake, brake fluid has entered your power steering system, immediate action is crucial. Do not attempt to drive the vehicle. Here's what you need to do:
- Contact a qualified mechanic immediately. This is not a DIY job. Improper flushing or repair can cause further damage.
- Do not start the engine. Starting the engine could exacerbate the damage.
- Have the power steering system professionally flushed and inspected. This involves completely removing the contaminated fluid and replacing all damaged components, including hoses, seals, and potentially the power steering pump. The mechanic will inspect the entire system for further damage.
Prevention is Key: Identifying Your Fluids
Always double-check the fluid reservoirs before adding any fluid to your vehicle. Brake fluid reservoirs are typically clearly marked and easily identifiable, usually a smaller container near the engine bay. Power steering fluid reservoirs are also labeled and usually are a larger container. If you're unsure, consult your owner's manual.
Knowing the difference between brake fluid and power steering fluid, and being careful when topping off fluids are crucial for preventing this costly and potentially dangerous mistake. Never compromise on safety when dealing with your vehicle's fluids.
Disclaimer: This information is for educational purposes only and should not be considered professional automotive advice. Consult a qualified mechanic for any vehicle repair or maintenance.
