Brake and power steering fluids are both hydraulic fluids used in various types of automobiles. However, they have striking differences that make them not substitutes for each other but distinct hydraulic fluids. So, can you use brake fluid for power steering? Definitely NO. Both fluids are poured into separate systems in your vehicle and are not manufactured with similar compositions, making them unique to their specific functions.
If these two hydraulic fluid forms are substituted with one another, the effects are dangerous to your vehicle, which you will know later on as you read this article. But note this: brake and power steering fluids are separate hydraulic fluids that function independently, so ignore any misconceptions or uncertainties about this and make this known.
Can I Use Brake Fluid For Power Steering Fluid?
Although brake and power steering fluids share certain characteristics, they differ in many ways that cannot be ignored. If you attempt to use your brake fluid as a substitute for your power steering fluid, the damage is high-level critical. You risk damaging your vehicle’s entire power steering system, which will incur a very high repair cost.
We will provide a summary of the differences between these two types of hydraulic fluid.
Brake Fluid vs. Power Steering Fluid
| S/N | BRAKE FLUID | POWER STEERING FLUID |
| 1. | Your brake fluid is a hydraulic fluid that powers the various parts of your car’s brake system, including the hydraulic brakes and clutch. The brake fluid acts as an anti-rust agent and a lubricant for the mobile parts of all automobiles, trucks, and bicycles. | Power steering fluid is a hydraulic fluid with low viscosity used in your car’s power steering system. Its function is to add sufficient pressure to your pump, increasing the power steering system’s effectiveness. |
| 2. | Brake fluid helps to keep your car’s brake system functioning at high efficiency. | Power Steering fluid functions are aimed at your steering wheel. The fluid improves your vehicle’s handling, giving you more control while driving. |
| 3. | This form of hydraulic fluid can be mineral oil, silicone, or glycol-ether-based. | This fluid is petroleum-based. |
| 4. | Brake fluid is incompressible and has a very high boiling point, which makes it distinct. | Although power steering fluid has a high boiling point, it is compressible and has a low freezing point. |
| 5. | You should use the brake fluid in your car’s brake system only. | Use this fluid only in your power steering system. |
| 6. | The brake fluid is usually light yellow before use, but turns brown over time. | Power Steering Fluid Color can be yellow, amber, or pink before use, but may turn black over time. |
| 7. | This fluid is caustic, meaning it has harsh effects when spilled onto other surfaces. For instance, it can wash off the bright paint on your vehicle and even damage your skin. | This hydraulic fluid is not caustic, so it won’t harm your skin. |
| 8. | The brake fluid consists of 4% to 29% of lubricant properties. So it is not a good lubricant. | Power steering fluid consists of 86% to 92% lubricant, making it an excellent lubricant. |
Read Also: Best Brake Fluid Testers Reviews and Complete Guide
So with these differences, if you are wondering, can you use transmission fluid for brake fluid? No way, don’t do that. Unlike the power steering fluid, there is practically no adequate substitute for your brake fluid.
What happens if I use brake fluid for power steering?
The brake fluid in your power steering system causes damage to the gaskets, rubber hoses, and seals found in your vehicle’s power steering system. It causes swelling and leaking of the brake line, and it also causes other parts to dissolve completely. This also causes complete failure of the power steering. You should know that when you pour brake fluid into the power steering system, you will start experiencing vehicle system issues in no time.
Pouring a small amount of brake fluid into the power steering reservoir, accidentally or not, will undoubtedly incur severe damage to your vehicle. You should use brake fluid for your brake system only. When emergencies arise or accidentally brake fluid is used in the power steering instead of steering fluid, drain the fluid out immediately, and the emergency is over.
Also, using brake fluid for power steering causes excessive wear and tear, and it can cause the steering pump to break down. It causes issues with your car’s brakes and also the steering pump. This is because your brake fluid is alcohol-based, and the pump needs a petroleum-based product like the steering fluid for lubrication.
The brake fluid in your power steering system is very detrimental to your car. Especially when brake fluid circulates through your steering system, it’s tough to flush out. The longer your brake fluid stays in your power steering system, the greater the damage.
This leads to costly damage, especially when the brake fluid is not drained on time. Your power steering system will not move quickly. Due to the brake fluid’s corrosive nature, the steering system’s metallic surfaces will rust and wear out quickly, drastically reducing its durability.
You should expect a complete failure of your brake system if you use your brake fluid to substitute your power steering fluid. This also applies to your brake system: you should not pour even a small amount of power steering fluid into the brake fluid reservoir.
How to fix the problems caused by Brake fluid in the power steering
You already know that using your brake fluid in your power steering system is not an option. This is mostly because the brake fluid is acidic and has low lubricating properties. But if you’ve already done or done this without knowing, then you need to flush your vehicle’s power steering system thoroughly, but can I use transmission fluid for power steering fluid? Yes, you can try that, but ensure you check the manufacturer’s recommendation for the vehicle.
The detailed process for doing this is shown below. But you should do this only when you are confident you will execute the whole process. If not, call for professional help.
When you realize you accidentally poured your brake fluid into your car’s power steering system. Do not turn on your car engine to drive to the mechanic’s shop or anywhere. Leave your car to remain at rest. This should reduce the extent of damage that could have occurred. Since you did not turn on your car’s engine, the brake fluid that poured will remain in the reservoir.
Get your mechanic’s toolbox, open the reservoir of your power steering fluid, and suck out as much fluid as possible. Ensure you have a can to retain the fluid.
Lift your vehicle off the ground with a jack or car lift so your wheels aren’t in contact with the ground. You need to know how to use any of the lift options. If not, do not attempt to use them. When your vehicle is lifted, turn the steering wheel to allow more fluid to flow to the reservoir. Try to get it out of the reservoir. You can get a baster to help you out.
You now have to disconnect your low-pressure line. Use the correct screwdriver type to remove the clamp. After disconnecting, direct the line into a container and allow the brake fluid to drain out. While the brake fluid is draining, turn your steering wheel left and right to help drain more of it.
When you notice there is little or no brake fluid left in your reservoir system. Pour in new power steering fluid and allow it to drain from the system into a can. You should do this about three times. When you finish this process, couple your power system back together and pour fresh power steering fluid into your reservoir.
You should be very careful when flushing brake fluid from your power steering system. If you do this correctly, you shouldn’t have to call a mechanic to help you out. It’s almost the same process a professional will take.
But in a situation where you’ve already driven your vehicle after pouring brake fluid into your car’s power steering system. You need to get your vehicle to a mechanic immediately to have the system flushed and to fix any damage that may have occurred. You might be thinking, ” Can I use hydraulic fluid for power steering? Well, this depends on the type of hydraulic fluid. It is best to stick to the recommended fluid.
Final Words
Now you know the differences between these two fluids, so if anyone asks, what can I use instead of power steering fluid? We always tell them to stick to the recommended fluid; we might provide a safe alternative if one is available. With this knowledge, can you use brake fluid for power steering fluid? You know the answer already. Even if there are other available substitutions, always check your manufacturer’s manual before taking any action.
