13 Scientific Reasons Behind the Mysterious Noises Your Car Makes

Just like humans and animals, when something isn't operating correctly, car noises. For the untrained ear, these mysterious noises can be confusing and often unsettling.

You may find it challenging even to locate where the sound is coming from, and you probably have no idea how severe the problem is or may become.

If you are concerned about the noises that your car is making, you should immediately take your vehicle to a professional mechanic. Perhaps you need to purchase automotive bearings in Dubai, replace your exhaust system, or just tighten some screws.

Whether you have a rattling engine, a sizzling hood, a thumping exhaust, or screeching brake, here are 13 scientific reasons behind the mysterious noises your car makes.

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  1. If your engine is rattling...

If you hear a rattling noise from your engine, there is a good chance that your tensioner or timing belt is worn out, has come loose, or is just out of alignment.

  1. If your engine is clicking...

One of the easiest engine problems to fix, a clicking engine usually means that the engine is low on oil. So, your first step should be to check the oil level. If that isn't the problem, then it may be clicking as a result of a loss of oil pressure somewhere else in the system.

  1. If your engine is ticking...

Slightly different to clicking, a ticking engine usually symbolizes an issue with the valve train. There are a number of reasons this could be happening, so if you hear this noise, certainly take your car to a professional auto mechanic for a thorough and proper diagnosis.

  1. If your engine is popping...

A popping engine isn't a good sound, but it could be the result of a range of issues. These include a hindered fuel filter, an ignition issue, impaired or corroded spark plugs, or a compromised catalytic converter. Again, this is a noise that a professional should diagnose.

  1. If your engine is squealing...

A squealing engine signifies it is time to have your fan belt replaced. This is an unmistakable sound and relatively common as fan belts tend to slacken over time.

  1. If your engine is knocking...

Most of the time, a knocking engine occurs when you have not been using the appropriate grade of fuel in the car. Make sure that you are always following the requirements in your car's manual in regards to oil, gasoline and tire air pressure.


  1. If your brakes are screeching or scraping...

Screeching brakes are usually a result of worn-out brake pads, a clear indicator that now is the time to substitute them with new ones. If the brakes sound as though they are scraping, then there is no doubt that the brake pods are done.

On the off chance, this is not the issue, the noise may be occurring because the brake pads have overheated. However, no matter what the reason, this is a serious safety issue and will require immediate attention.

  1. If you hear clunking while braking...

This mysterious noise which can only be described as "clunking" is usually due to a broken caliper or a caliper that isn't correctly mounted.

Additionally, it could be a result of worn-out steering system components or damaged/missing brake hardware.


  1. If your hood is hissing or sizzling...

If your car is hissing or sizzling, these noises are usually due to some kind of leakage, according to Popular Mechanics. This leak may be coolant or oil dripping onto the heated engine, the engine itself could be overheating, or a vacuum line could be drooling.

There is a good chance that your “Check Engine” light will also go on. Without a doubt, take it to your licensed mechanic as your lines may need to be reattached or replaced.

  1. If your hood is knocking or pinging...

Knocks or pings under your hood is usually due to the fuel not being correctly burned in your engine. Whether it is the wrong spark plugs, sediments on the surfaces of your engine’s cylinders, or impaired or unsecured rod bearings, this noise signifies a severe issue that needs professional help.


  1. If your exhaust is thumping...

Any mysterious noises in your exhaust is not a good sign. The most common (problematic one) is a thumping or clunking sound.

Usually, this is due to a damaged exhaust system, an entirely severe issue. If you hear any unusual noises coming from your exhaust, have it investigated immediately by a professional.


  1. If, when you accelerate, there is a roaring noise...

If a roaring noise happens and increases with intensity as you accelerate harder, then you should certainly first check your car's exhaust system. If that isn't the issue, your next guess should be linked to a transmission issue.

  1. If, when you accelerate, there is a squealing or chirping noise...

Most of the time, a squeal or chirp that is produced when acceleration occurs is because a belt has become slack and is now shifting.

You may have also turned the steering wheel to its limits. Alternatively, it could indicate that a drive pulley for another engine accessory has moved out of place.

It also pays to check if it's caused by external factors, such as a driveway in need of repair and causing damage to the car. Whatever it is, knowing a professional has checked it over will give you peace of mind when it comes to getting the car back on the road!

Have a safe drive!

This was a guest article written by Hassanein Alwan.

Let me know does this article was helpful or not in the comments section.

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