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Car Exhaust: Function, How It Works, and Signs of Damage

09 April 2025
Knalpot Mobil: Fungsi, Cara Kerja, dan Ciri Kerusakannya

The car exhaust is one of the vital components of a car. However, this component is often overlooked by most car owners. So what is the function of the exhaust in a car? To find out, pay attention to the following review.

Function of Car Exhaust 

The exhaust in a car has a very vital function. The complete functions are as follows.

1. Controlling exhaust gas emissions 

As is known, car exhaust has various components inside it, including catalytic converter (CC). This part of the exhaust component functions to reduce exhaust gas emissions that contain pollutants that can contaminate the environment and disturb human health. Examples include carbon monoxide, nitrogen oxides, and hydrocarbons.

2. Maintaining engine performance 

The exhaust in a car also functions to maintain engine performance. If the car exhaust is clogged, it will certainly reduce the engine's performance in working.

3. Adding aesthetic value

Another function of the exhaust is to add aesthetic value to the car. As is known, many exhausts with cool designs are sold in the market, so many automotive enthusiasts use exhausts as part of their car modification ideas.

How Car Exhaust Works

As is known, there are several important components in the exhaust such as exhaust manifold, exhaust pipe, muffler tip (tailpipe), muffler, catalytic converter, and resonator. All these components work together so that the exhaust can function properly. The complete working mechanism of the exhaust is as follows.

  1. First, the engine cylinder will expel exhaust gases through the manifold directed to the car exhaust.
  2. Inside the exhaust itself, there is a resonator that functions as a sound dampener. The resonator usually consists of fiber or metal fiber filling material. The resonator will play a role in reducing noise when the engine is expelling exhaust gas emissions.
  3. Meanwhile, the catalytic converter functions to convert the toxic gas content contained in the exhaust emissions into safer compound content before it is released.

Read Also : Rules for Using Car Exhaust on the Road, Let's Understand!

Signs of Damage to Car Exhaust

Over time, the car exhaust will usually experience damage. Typically, before the exhaust is damaged, several signs will appear as follows.

1. The exhaust sound becomes louder

The first sign of a damaged exhaust can be identified from the sound produced by the exhaust. Usually, the exhaust sound will become louder than before. This can happen when the exhaust has cracks or holes.

2. Presence of holes and cracks in the exhaust

The second sign, you can see the physical condition of the exhaust. An exhaust that has started to wear will usually have holes and cracks. Changes in the exhaust are usually caused by corrosion or impact from solid objects.

3. A strong odor from the exhaust emissions 

The third sign, usually the aroma of the exhaust emissions becomes stronger and has a burnt smell. This occurs when the catalytic converter component is damaged.

4. Thick smoke emitted from the exhaust 

The fourth sign, a damaged exhaust will likely emit exhaust smoke that is grayish black. This occurs due to a failure in the engine combustion process or damage to the catalytic converter component.

5. The engine hisses when started

The last sign can usually be seen when the car engine is first started. A damaged exhaust will cause the engine to hiss when it is first started. This can happen due to damage to the exhaust components, whether from the muffler, tailpipe, or exhaust pipe.

Read Also : Why Does the Car Exhaust Emit Water? Here are the Causes and Solutions

If the signs above appear on your car, you should immediately service your car at the nearest official Daihatsu workshop.

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