Does Power Steering Fluid Damage Rubber?

There are various rubber seals throughout the power steering system that help contain the fluid and maintain pressure. What happens if power steering fluid spills on these rubber seals and hoses? Does power steering damage rubber? You are about to find out. 

Key Takeaways of this Article

• Power steering fluid can damage rubber components if not cleaned properly.
• Shaft seals, O-rings, gaskets, piston seals, and pressure seals are vulnerable to damage if power steering fluid is spilled when pouring into the reservoir.
• Use a funnel when adding fluid. Cleaning the spills right away is imperative to minimize the impact.

Does Power Steering Fluid Damage Rubber?

Yes, power steering fluid does contain ingredients that can deteriorate and damage rubber components over time if spills are not cleaned up properly. This is why you should pour power steering fluid carefully into the reservoir using a funnel and clean up spills promptly to prevent them from being on surfaces for extended periods.

Seals such as shaft seals, O-rings, gaskets, piston seals, and pressure seals are used in a power steering system and are more vulnerable to damage from power steering fluid spills.

In addition, the power steering hose is another critical component that can be vulnerable to damage from power steering fluid spills. Power steering hoses are located near the engine, where temperatures can get quite high.

If power steering fluid spills onto a hose and is not cleaned off promptly, the heat from the engine can accelerate the degradation of the rubber.

What Additives Does Power Steering Fluid Have to Damage Rubber?

Zinc dialkyl dithiophosphate, sodium nitrite, sodium benzoate, and dimethylpolysiloxane are commonly found in power steering fluid. While these additives are beneficial for the performance and longevity of the power steering system, they can also have an impact on rubber components.

How Can I Avoid Power Steering Fluid From Coming into Contact With Rubber Components?

There are a few things you can do to prevent power steering fluid from coming into contact with rubber components of your vehicle. Here are a few tips:

• Inspect the power steering system for leaks. If you notice the power steering fluid level getting abnormally low, there could be a leak in the system. Leaks can lead to steering fluid coming into contact with rubber components.
• Use the manufacturer-recommended steering fluid type to minimize the impact. This will ensure the compatibility of power steering fluid with rubber components.
• When adding fluid, use a funnel to prevent spills and avoid getting fluid on rubber components. If a spill does occur, clean it up promptly to prevent prolonged contact with rubber components.

How to Remove Spilled Power Steering Fluid from Engine Components?

1. Use clean towels to absorb as much of the spilled power steering fluid as possible. Wear gloves to protect your skin.
2. Use a degreaser or soap and water to clean the affected engine components thoroughly. Gently scrub to remove any remaining residue.
3. Rinse the area with clean water to remove any traces of the degreaser or soap. When rinsing with water, avoid spraying water directly into sensitive electrical components. Use a gentle stream of water from a hose or a spray bottle, taking care not to force water into areas where it shouldn’t go.
4. After rinsing, dry the area thoroughly before starting the engine.

We have an article on How To Get Power Steering Fluid Out Of Clothing to help you if you have spilled power steering fluid on your clothes.

How Long Does Power Steering Fluid Damage Rubber?

The duration of damage depends on factors such as the type of fluid, the types of rubbers used for the engine components, and surrounding conditions such as temperature.

In general, if the power steering fluid is left in contact with rubber components for an extended period without cleaning, it can cause the rubber to deteriorate and eventually fail. If you accidentally spill power steering fluid on rubber components, it’s best to clean it up as soon as possible.

If you are interested in knowing whether the power steering fluid is corrosive, read our article on ‘Is Power Steering Fluid Corrosive?’