Your engine works by creating thousands of small explosions that push against the pistons, which in turn rotates the crankshaft and eventually drives your vehicle’s wheels.
These explosions produce leftover gases, known as exhaust gases, that are made of potentially dangerous chemicals such as carbon monoxide, hydro carbons and nitrogen oxide.
In order to keep drivers and passengers safe, these chemicals need to be guided away from the front end of the car so they don’t enter the interior and cause harm. An exhaust system involves a series of parts and piping that redirects these toxic exhaust gases to the rear of your vehicle.
The exhaust manifold is a cast-iron piece bolted directly to the engine block and is the first section of your vehicle’s exhaust system. Its function is to collect the exhaust gas from the engine cylinders into one pipe and send it through the catalytic converter.
Signs of a bad or damaged exhaust manifold include excessive engine noise, decrease in power, fuel efficiency and acceleration and a burning smell coming from the engine.
The next piece of your vehicle’s exhaust system is the catalytic converter, which is designed to reduce air pollution by changing unburned hydrocarbons, nitrogen and carbon monoxide into carbon dioxide and water.
It works by creating a chemical reaction when these harmful toxins come into contact with the “catalysts”, substances that can change a chemical’s composition without being consumed in the process.
The exhaust system runs from the front of your vehicle to the back and require hangers to ensure that the parts and piping are held in place. Hangers are made of rubber and stretched between hooks in order to secure the exhaust system. The rubber also reduces noise and friction.
Hangers have a universal design, meaning that you do not need a specific “model” for your vehicle. If a hangar is damaged or missing, your tailpipe or exhaust pipe may end up dragging on the ground.
Exhaust joints are used to secure the hangers and slip-fit pipe connections (such as the piping to the muffler). There are 4 types of exhaust joints: U-bolt, ball and socket, flat band and V-band clamps.
Exhaust joints, and hangers, do not require welding like most parts of the exhaust system. Therefore, they are fairly easy to replace. Without them, pieces of your exhaust system will become loose or disconnect.
As mentioned above, your engine creates power by causing thousands of explosions. Unfiltered, these explosions are loud.
Mufflers are designed to reduce this engine noise by routing the sound waves through a series of tubes or chambers. As the noise bounces around in the muffler, its volume is greatly reduced.