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How do you tell if your motor mounts are bad?

If your vehicle is experiencing unusual vibrations, shaking, or noises, it could be a sign that your motor mounts are worn out or damaged. Motor mounts are essential components that secure the engine to the vehicle's frame, and when they fail, it can lead to a range of problems. In this article, we'll explore the signs of bad motor mounts and provide guidance on how to identify and address the issue.


Symptoms of Bad Motor Mounts


The most common signs that your motor mounts may be failing include:



  • Excessive engine movement or vibration: If your engine is moving more than it should, especially during acceleration or braking, it could indicate a problem with the motor mounts.

  • Clunking or banging noises: When the engine moves excessively, it can cause the engine to hit the vehicle's frame, resulting in loud clunking or banging sounds.

  • Difficulty shifting gears: Worn motor mounts can cause the engine to shift position, making it harder to shift gears, especially in manual transmission vehicles.

  • Increased engine noise: As the motor mounts deteriorate, the engine may become more audible, with a louder hum or rumble.


If you notice any of these symptoms, it's essential to have your vehicle inspected by a qualified mechanic to determine the root cause and address the issue before it leads to more serious problems.


Diagnosing Bad Motor Mounts


To diagnose bad motor mounts, a mechanic will typically perform a visual inspection and a test drive. They may also use a diagnostic tool to measure the engine's movement and identify any issues. Some common diagnostic methods include:



  • Visual inspection: The mechanic will examine the motor mounts for signs of wear, cracks, or damage.

  • Test drive: The mechanic will drive the vehicle to observe the engine's behavior, looking for excessive movement or vibration.

  • Diagnostic tool: The mechanic may use a specialized tool to measure the engine's movement and compare it to manufacturer specifications.


If the motor mounts are found to be faulty, the mechanic will recommend replacing them to restore the engine's stability and prevent further damage to the vehicle.


Replacing Motor Mounts


Replacing motor mounts is a relatively straightforward process, but it's important to have it done by a qualified mechanic. The steps typically involve:



  • Jacking up the vehicle: The mechanic will raise the vehicle to access the motor mounts.

  • Disconnecting the engine: They will disconnect the engine from the motor mounts, either partially or fully, depending on the vehicle's design.

  • Removing the old motor mounts: The mechanic will remove the old, worn-out motor mounts.

  • Installing the new motor mounts: They will then install the new motor mounts, ensuring they are properly aligned and tightened.

  • Reconnecting the engine: Finally, the mechanic will reconnect the engine to the new motor mounts and lower the vehicle back down.


After the replacement, the mechanic will test the vehicle to ensure the new motor mounts are functioning correctly and the engine is properly secured.


By being aware of the signs of bad motor mounts and addressing the issue promptly, you can help maintain the overall health and performance of your vehicle.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.