When an engine makes any abnormal noise, you must determine what the noise is and where it is coming from so that you may find the problem. When you have an idea of the problem, you can inform a mechanic or complete the repair yourself if you are technically inclined. Engine noises are produced from a variety of components, and the noise may only be present in certain situations. You may find it helpful to have someone assist you with locating the noise, especially if the noise is only present while driving.
Listen to the vehicle to determine when and where the noise is coming from. It may be helpful to have another person listen with you. Determine if the noise occurs when the vehicle is running, while starting or while steering.
Lift the vehicle using a vehicle lift or jacks in the approved locations. Refer to the owner's manual for information on lifting the vehicle using jacks. Beneath the vehicle, inspect the engine mounts for wear or broken parts. If the rubber and metal part of the mounts are no longer together, the mount has failed. When a mount fails, the engine rests against the vehicle frame which can result in a grinding sound while the vehicle is running.
Open the hood while the vehicle is parked and turned off. If you are hearing the grinding while steering, you need to check the power steering fluid. Locate the power steering cap and unscrew it. Remove the dipstick to check the level of fluid, and replace the fluid if necessary. Have a mechanic inspect the vehicle for a leak, which is the cause for low power steering fluid, according to 2 Car Pros.
Determine if the vehicle is only making the noise while shifting into gear. If a grinding noise is present while the vehicle is changing gears, the transmission may have failed. Have a mechanic repair the transmission.
Look at the flywheel in the engine while the vehicle is off and parked. If the grinding noise is only present while starting, the flywheel may be damaged which can cause a grinding sound. If the vehicle will not start and you hear a grinding noise, the starter may be broken. Have an auto mechanic inspect the vehicle and make the necessary repairs to the starter or flywheel.
