Cars made today are pretty quiet. A car that is working well and firing on all cylinders, so to speak, barely makes a whisper. This can make it particularly jarring when you hear your car making some unexpected sound—either under the hood or in the rear of the vehicle. It helps to know what the sounds you hear mean, as these sounds are essentially the car trying to tell you something important. Knowing when it is time to bring your car into a garage for repairs often starts with you hearing an unexpected and unfamiliar sound. To help decipher those noises, here is a list of sounds cars make and what those sounds mean.
10. A Knocking in the Engine
Before you panic when hearing this sound, keep in mind that a knocking in the engine is usually caused by using the wrong type of gasoline in the car. Filling up your vehicle with a low grade gasoline when it requires higher quality octane causes havoc with the spark plugs, which leads to the pistons moving erratically and this causes the knock knock sound that you hear. Consult the vehicle owner manual and ensure that you are using the proper type of gasoline in the car. Once you fill the tank with the right gas, the knocking sound should quickly disappear. No need to bring the vehicle into a garage for a costly inspection, and no need to worry. A little knowledge goes a long way.