What is the reason for hair on the car exhaust pipe? What will happen if the exhaust pipe is blocked?

The exhaust pipe is a part of the car that discharges the exhaust gas generated by the engine. Some drivers may find that there are thin and long objects like hair in the car exhaust pipe, which looks a bit scary, but it is actually part of the car parts. So what is it?

What is the reason for hair on the car exhaust pipe?

This "hair"-like thing is actually the filler of the exhaust pipe.

This can be concluded that there is a problem with the muffler. What was removed is the heat-resistant muffler material of the muffler. It was not originally black. Due to the damage of the parts, the filler was exposed and discharged to the end of the exhaust pipe with the exhaust gas flow. Then it was smoked black by the exhaust gas, and the carbon particles attached to the surface turned black. It is a kind of glass fiber material. In fact, it feels harder than hair, so I can't be sure if it is hair without touching it.

This situation rarely happens. Most of the time, it is due to disrepair, inadequate maintenance and untimely replacement, which leads to damage of accessories, deterioration, falling off and exposure of fillers. Or, the exhaust pipe is blocked, and the owner is unaware of the long-term high throttle driving, which leads to the cracking of the silencer layer and the discharge of the silencer cotton due to the poor exhaust gas flow. If the blockage is serious, it will also cause the vehicle to frequently stall, the exhaust pipe to burst, and damage to the three-way catalytic converter.

What happens if the exhaust pipe is blocked?

1. Incomplete blockage.

It will cause the engine fuel consumption to increase, the acceleration to be weak, and the engine to make a variety of dull noises. At the same time, there will be traces of high temperature burning on the exhaust pipe. These are all caused by poor exhaust, which leads to the exhaust pipe burning and red. Usually, this fault phenomenon will also occur when the three-way catalytic converter is partially blocked.

2. Completely blocked.

The exhaust pipe is completely blocked, which causes the engine to stall due to poor exhaust. It is difficult to start the engine again or it cannot start at all.

What is the reason for the black inside the car exhaust pipe?

First, carbon deposits in the engine.

The reason for the formation of carbon deposits is that the mixture of wax and gum produced during the fuel combustion process solidifies over a long period of time and remains at the exhaust pipe outlet, making it difficult to discharge all of it.

Second, turbocharged engine models.

You can notice on the road that 9 out of 10 turbocharged engine models are black, but almost. The main reason for blackening is carbon deposits, and turbocharged engine models are more likely to form carbon deposits.

Special mention should be made of the direct injection engine technology. The working principle of a direct injection engine is to spray gasoline directly into the cylinder through a fuel injector rather than supplying fuel in the form of steam. After using direct injection technology, the fuel enters the cylinder in the form of fine droplet-like mist. Due to the special structure of the direct injection engine, carbon deposits are very easy to form, but generally there will not be a major impact. However, while direct injection engines have the advantage of saving fuel, the probability of producing carbon deposits is higher than that of multi-point electronic injection models.