What Is a Strut Mount?
A strut mount is a critical component of a vehicle’s suspension system, connecting the strut assembly to the vehicle's chassis. It acts as a pivot point for steering and absorbs road shocks, enhancing ride comfort and handling.
Some strut mounts include a strut mount bearing, which allows the strut to rotate when the steering wheel is turned. Others feature a strut bushing, which helps cushion impacts and reduce vibrations.
How Does a Strut Mount Work?
The strut mount plays a vital role in the suspension system by providing a secure connection between the strut assembly and the chassis. Here’s how it functions:
- Absorbing Shocks – The mount, often made of rubber and metal, helps absorb impacts from road irregularities.
- Supporting Steering Movement – In front-wheel-drive vehicles, the strut mount bearing allows the strut to rotate, helping with smooth steering.
- Reducing Noise and Vibration – The rubber component of the mount helps dampen noise and road vibrations, improving ride quality.
A worn-out strut mount can cause handling issues, excessive vibrations, and increased road noise, making replacement essential for vehicle safety and performance.
Types of Strut Mounts and Their Use Cases
There are several types of strut mounts, depending on vehicle design and performance requirements:
1. Standard Strut Mounts
- Found in most passenger vehicles.
- Consists of a metal plate with rubber insulation.
- Designed to provide a balance between comfort and durability.
2. Strut Mounts with Bearings
- Typically used in front-wheel-drive vehicles.
- Contains a bearing that allows the strut to rotate, aiding in smooth steering.
- Essential for proper alignment and handling.
3. Heavy-Duty Strut Mounts
- Used in trucks, SUVs, and off-road vehicles.
- Made with reinforced materials for added durability.
- Designed to withstand rough terrain and heavy loads.
4. Performance Strut Mounts
- Found in sports and high-performance cars.
- Made from stiffer materials for enhanced handling and cornering stability.
- Reduces body roll and improves suspension responsiveness.
Symptoms of a Bad Strut Mount
A failing strut mount can negatively impact vehicle handling and ride comfort. Here are common symptoms of a bad strut mount:
- Excessive Noise – Clunking or knocking sounds over bumps indicate worn-out rubber or loose mounting hardware.
- Poor Steering Response – Difficulty in steering or a loose steering feel may suggest a failing strut mount bearing.
- Increased Vibrations – More noticeable road vibrations, especially on rough surfaces.
- Uneven Tire Wear – Misalignment due to worn strut mounts can cause irregular tire wear.
- Vehicle Swaying or Leaning – A bad mount can affect suspension stability, leading to excessive body roll.
- Steering Wheel Misalignment – If the strut mount bearing is damaged, it can impact wheel alignment and cause steering drift.
Ignoring these signs can lead to further suspension damage and compromise vehicle safety.
Causes of Strut Mount Failure
Several factors can contribute to strut mount failure over time:
- Normal Wear and Tear – Rubber components degrade due to age and constant road impact.
- Harsh Driving Conditions – Rough roads, potholes, and off-road driving accelerate wear.
- Moisture and Corrosion – Exposure to rain, snow, and road salt can lead to rust and premature failure.
- Faulty Installation – Improper torque or incorrect alignment can cause premature wear.
- Overloaded Vehicles – Carrying excessive weight puts additional stress on the strut mount and suspension system.
When to Replace a Strut Mount
Strut mounts typically last 50,000 - 100,000 miles, but replacement may be necessary sooner depending on driving conditions. Here are key indicators that it’s time for a strut mount replacement:
- Visible Cracks or Damage – Inspect mounts for cracks, tears, or deformities.
- Persistent Suspension Noises – If knocking sounds persist after replacing struts, the mounts may need replacement.
- Steering Issues – A worn strut mount bearing can affect steering precision.
- Alignment Problems – If regular alignments don't fix steering drift, worn strut mounts may be the culprit.
It’s best to replace strut mounts when installing new struts, as worn mounts can reduce the lifespan of new suspension components.
DIY Strut Mount Replacement Guide
Replacing a strut mount requires mechanical knowledge and proper tools. If you’re comfortable working on your vehicle, follow these steps:
Tools and Parts Needed:
- New Strut Mounts (OEM or aftermarket)
- Socket Wrench Set
- Torque Wrench
- Spring Compressor
- Jack and Jack Stands
- Pry Bar
- Safety Gloves & Goggles
Step-by-Step Instructions:
- Lift the Vehicle – Secure the car on jack stands and remove the wheels.
- Access the Strut Assembly – Remove the strut bolts connecting it to the control arm.
- Compress the Spring – Use a spring compressor to safely relieve tension on the mount.
- Remove the Old Strut Mount – Detach the mount from the strut assembly.
- Install the New Mount – Secure it in place with proper torque specifications.
- Reassemble and Reinstall – Reverse the steps, ensuring all bolts are tightened correctly.
- Perform an Alignment – After installation, a professional wheel alignment is recommended.
The process takes about 2-4 hours per strut, depending on vehicle complexity.
Additional Parts and Consumables Needed
When replacing a strut mount, consider replacing or inspecting these related components:
- Struts/Shocks – If the struts are worn, replace them along with the mounts.
- Strut Bearings – If applicable, replace the strut mount bearing to prevent steering issues.
- Control Arm Bushings – Worn bushings can affect suspension performance.
- Strut Bolts & Nuts – Use new hardware if old bolts are corroded or worn.
- Alignment Services – Necessary after any suspension work.
Final Thoughts
A strut mount is an integral part of your suspension system, ensuring a smooth and stable ride. If you experience knocking noises, poor steering response, or excessive vibrations, it may be time for a strut mount replacement.
Regular inspections and maintenance can prevent costly repairs and enhance driving comfort. Whether you choose a DIY replacement or professional service, keeping your strut mounts in good condition will improve your vehicle’s performance and longevity.
