(Updated on November 24, 2021)
The chassis of a vehicle is the base frame which all the other vital components are connected to, such as the engine. There is something called an engine (motor) mount which allows the engine to stay firmly attached to the chassis. This prevents the engine from shaking or moving as you’re driving.
For example, when you drive over potholes or bumps in the road, the engine mount absorbs any sudden movement that the vehicle’s suspension doesn’t, so that the road surface doesn’t affect the engine’s position.
Engine mounts are all made differently in order to accommodate different make and model vehicles. You will usually find engine mounts containing metal and rubber materials.
See Also: 4 Symptoms of a Bent Engine Valve
Bad Engine Mount Symptoms
Engine mounts are small parts which might not look like much on the outside. But, they are very important because they’re responsible for keeping the engine stabilized and aligned with the frame of the vehicle.
If you were to have a bad engine mount because of excessive driving and wear and tear, then certain symptoms will develop. These symptoms need to be addressed soon or else they will get worse.
Here are the top 5 signs of a bad engine mount.
1) Bouncy Engine
The worst thing that can happen is for your engine mount to snap and break off completely. This would mean that your engine would have no stability or alignment whatsoever.
Instead, it will just bounce left and right as you put your foot on the gas pedal and the engine RPM rise. Then, if you were to go over a bump in the road, it could even bounce up and down.
All this bouncing is likely going to cause major damage to your engine and surrounding components. It could something simple like radiator fan that becomes misaligned and gets damaged from making contact with the surrounding shroud. Or it could be much more serious where an entire new engine is required.
2) Engine Vibrations
Since the engine mount stabilizes the engine, it only makes sense that a bad engine mount will cause instability with the engine. This means the engine is going to vibrate because it is not held firmly to the frame of the vehicle.
The passenger side of the cabin should feel the vibrations even more. Sometimes the driver won’t even notice these symptoms until they have another person sitting in the passenger’s seat.
3) Strange Sounds
When you have an engine that is shaking, vibrating, and moving around in the frame, then it is going to cause knocking and clanking noises to be made.
Although these sounds could be caused by other things too, you should definitely have a mechanic check your engine mount if you are experiencing any of the other symptoms listed here too.
4) Engine Misaligned
When the engine is misaligned, it will actually tilt toward one side more than the other side. If you suspect your engine mount is bad because the other symptoms listed here are present, then pop open the hood and visually inspect the engine and how it sits.
Even being tilted at a very slight angle is a good indicator whether one or more engine mounts are truly bad.
5) Broken Belts and Hoses
When you have an engine that is not stable because of a bad engine mount, the most fragile components in the engine are going to break easily.
This means the belts and hoses are likely going to get damaged, especially as you accelerate in your vehicle.
The average replacement cost for an engine mount is anywhere from $200 to $600. The cost of the parts and labor can vary, depending on the make and model of your vehicle.
The parts cost will likely be between $50 and $150, while the labor costs will be between $150 and $450. It all depends on how difficult it is for the mechanic to access your engine mount.