Symptoms of a Bad Strut Bearing

The strut bearing is a key component of your car’s front suspension system. The front suspension is very important to your car’s ride, handling, and steering, so it is essential that your strut bearings are in good operating condition at all times.

The strut bearing is the upper pivot point for each of the two front strut assemblies. The strut bearing allows the strut to rotate when the wheels are turned to steer the car. A strut is a multi-purpose component used in certain types of suspensions.

A strut usually incorporates a built-in shock absorber and a coil spring. It also works as a structural member of the suspension, holding the tire in the correct position. The top of the strut is bolted to the body structure, while the bottom of the strut is attached to the car’s suspension and steering (in the case of the front struts). Using a strut-type suspension allows for a simpler, more compact design that is easier to assemble when the car is produced. Strut-type suspensions are very common on modern vehicles.

Symptoms of a bad strut bearing

A problem with your strut bearings can be very dangerous. Because your strut bearings are part of your car’s steering system, your ability to steer your vehicle in an emergency can be affected. Bad strut bearings could potentially cause a loss of control and a crash. Wear, age, corrosion, extreme weather, high humidity, and collisions can all cause deterioration of your strut bearings. Here are some of the warning signs of bad strut bearings;

• Knocking, banging, clunking, rattling, squeaking, creaking, or popping noises, during low-speed steering moves or when hitting bumps
• Excessive vibration through the suspension or steering
• Stiff, heavy, jerky, hard, or binding steering
• Poor wheel alignment
• Uneven tire wear
• Deterioration of rubber mount where strut bearing attaches to car body

Repairing a bad strut bearing

A bad strut bearing usually has failed due to either damage or wear and tear, so replacement with a new strut bearing is the only solution. Because the strut bearing is an integral part of your car’s front suspension, and replacing it involves a significant amount of labor, most mechanics will recommend replacing the strut bearing and the strut itself at the same time. In most cases, both of these components are likely equally worn and in need of replacement.

Your mechanic will first remove the strut from the vehicle. Next comes removal of the bad strut bearing, replacement with a new one, and then reinstallation of the strut into your vehicle. Strut bearings should always be replaced when the struts are replaced, and struts should always be replaced in pairs for the best, most consistent performance. A wheel alignment may be recommended following replacement of your struts and strut bearings.

Don’t try to repair a bad strut bearing yourself

Unless you have had extensive experience in working with suspension systems, leave this to the professionals! Your strut bearings are part of a subassembly that includes a large coil spring under tension, so the potential for serious injury is present. Special equipment is required to keep the spring tension under control while the strut is being replaced. Your mechanic has the proper tools and equipment to replace your strut bearings safely and efficiently.