Do Strut Mounts Need Lubrication? Understanding Your Vehicle’s Suspension

Strut mounts generally do not require lubrication as they are designed with sealed, self-lubricating components. Adding external lubricants can actually attract dirt and debris, potentially causing more harm than good to the strut assembly.

What Exactly Are Strut Mounts and Why Are They Important?

Strut mounts, also known as strut tower bearings or top mounts, are crucial suspension components. They connect your vehicle’s shock absorbers (struts) to the car’s chassis. These mounts are essential for several reasons:

• Cushioning Vibrations: They absorb road vibrations and noise, providing a smoother ride.
• Allowing Steering Movement: They enable the strut to pivot when you turn the steering wheel.
• Supporting Vehicle Weight: They bear a significant portion of the vehicle’s weight.
• Maintaining Wheel Alignment: They help keep your wheels properly aligned.

Without functioning strut mounts, you’d experience a much harsher ride and potential steering issues. They are a vital part of your car’s suspension system.

Why You Shouldn’t Lubricate Your Strut Mounts

The primary reason you should avoid lubricating strut mounts is their design and operating environment. Most modern strut mounts are engineered with materials that are either self-lubricating or sealed to keep contaminants out.

• Sealed Bearings: Many strut mounts use sealed ball bearings. These bearings are packed with grease from the factory and sealed to prevent moisture and dirt ingress. Opening them for lubrication would compromise this seal.
• Rubber Components: Other parts of the strut mount are made of durable rubber. Rubber doesn’t typically benefit from external lubrication and can even degrade when exposed to certain oils or greases.
• Attracting Contaminants: Applying any lubricant to the exposed areas of a strut mount will inevitably attract road grime, salt, and dust. This mixture can form an abrasive paste, accelerating wear and tear on the mount.

Think of it like trying to lubricate a sealed wheel bearing; it’s not designed for it and can lead to premature failure.

Signs of a Failing Strut Mount

While you don’t lubricate them, you do need to recognize when they are failing. A worn-out strut mount can cause a variety of symptoms that impact your driving experience.

• Clunking or Knocking Noises: You might hear distinct clunking sounds, especially when turning the steering wheel or going over bumps. This is often the first sign of a problem.
• Popping or Creaking Sounds: Similar to clunking, popping or creaking noises when turning can indicate a worn bearing or damaged rubber.
• Vibration in Steering Wheel: A degraded strut mount can transmit more vibrations from the road to your steering wheel.
• Uneven Tire Wear: If your strut mounts are not allowing the struts to pivot correctly, it can lead to misalignment and uneven tire wear.
• Poor Handling: You might notice a decrease in steering responsiveness or a feeling of looseness in the front end.

If you notice any of these symptoms, it’s time to have your strut mounts inspected by a professional.

How Strut Mounts Fail and What to Do

Strut mounts fail due to age, wear and tear, and exposure to harsh driving conditions. Constant flexing, temperature changes, and impacts from potholes all contribute to their eventual degradation.

When a strut mount fails, it needs to be replaced. This is typically done as part of a larger strut replacement service. It’s often recommended to replace strut mounts in pairs (both front mounts) to ensure even suspension performance.

What to do if you suspect a failing strut mount:

1. Listen for Noises: Pay attention to any new sounds your car makes, especially when turning or hitting bumps.
2. Feel for Vibrations: Notice any unusual vibrations through the steering wheel or chassis.
3. Check Tire Wear: Inspect your tires for uneven wear patterns.
4. Consult a Mechanic: Schedule an appointment with a trusted auto repair shop for a thorough inspection.

A qualified mechanic can diagnose the issue and recommend the necessary repairs.

Strut Mount Replacement: What to Expect

Replacing strut mounts is a job that requires specialized tools and knowledge. It involves disassembling part of the suspension system.

The process typically includes:

• Lifting the vehicle and removing the front wheels.
• Compressing the coil spring (a critical safety step).
• Disconnecting the strut from the steering knuckle.
• Removing the top nut and the strut mount assembly.
• Installing the new strut mount and reassembling the strut.
• Reinstalling the strut and other components.
• Performing a wheel alignment, which is highly recommended after strut work.

This is not a DIY job for most home mechanics due to the safety risks involved with spring compression.

Can You Lubricate a "Dry" Strut Mount?

Even if a strut mount appears "dry" or squeaky, it’s still not advisable to apply external lubricants. The squeaking is usually a sign that the internal components are worn or the rubber is degrading. Adding grease or oil will likely only provide temporary relief, if any, and will introduce contaminants.

Instead, a squeaky strut mount is a strong indicator that it’s nearing the end of its lifespan and requires replacement.

Frequently Asked Questions About Strut Mounts

Here are answers to some common questions people have about these essential suspension parts.

### What happens if a strut mount breaks?

If a strut mount breaks completely, you will likely experience a sudden loss of steering control and a significant change in how your vehicle handles. You may hear loud noises, and the wheel could become misaligned, making the car difficult or impossible to drive safely.

### How often should strut mounts be replaced?

There’s no set mileage for strut mount replacement. They typically last between 50,000 and 100,000 miles, but this can vary greatly depending on driving conditions and the quality of the original parts. Regular inspections are more important than a fixed replacement schedule.

### Can I drive with a bad strut mount?

While you can technically drive with a bad strut mount, it’s not recommended. It compromises your vehicle’s handling, braking, and overall safety. It can also lead to further damage to other suspension components and uneven tire wear, costing you more in the long run.

### What’s the difference between a strut and a strut mount?

A strut is a structural part of the suspension that combines a shock absorber and a coil spring into one unit. A strut mount is the component that attaches the top of the strut assembly to the vehicle’s body and allows it to pivot for steering.

### Does WD-40 help a squeaky strut mount?

No, WD-40 is not a suitable lubricant for strut mounts and can actually cause harm. It’s a solvent