Motor mounts are brackets that support and stabilize the motor of a vehicle. The purpose of motor mounts is to reduce vibration and shaking associated with normal engine use. The mounts are usually coated in rubber to act as small shock absorbers. If your Honda Civic is shaking or noisy -- or vibrates excessively -- one or more motor mounts might be broken.
Lift the hood of your Honda Civic. Secure it in place by inserting the end of the hood rod into the notch on the hood.
Locate the motor mounts of your vehicle. There are five motor mounts supporting the engine of most Civic models. One mount is found on each side of the motor. The others are located in front of and behind the engine. One is placed on the transmission mount.
Inspect the mounts visually. Look for cracks, worn rubber or chips. These are signs that the motor mount is broken.
Close the hood and turn on the car. Place the car in park and put your foot on the brake. Ask someone to stand next to car while you press on the gas. A motor mount is likely broken if the the car shudders or jerks.
Drive the car in an empty parking lot. Accelerate and decelerate quickly. A broken motor mount is indicated by the car shaking excessively or jumping roughly into gear. Listen for a heavy clunking noise; this could be the motor shifting back and fourth due to a motor mount that is broken.
