The Honda exhaust gasket is a metal sheet that fits between the exhaust manifold and the engine block. Its main function is to seal the exhaust manifold, preventing exhaust gases from escaping. A smoking engine is admittedly aesthetically not appealing. However, it is not only messy, it is also very dangerous. Exhaust gases leaking from the engine may enter the HVAC (heating, ventilation and air conditioning) system of the automobile. If this happens, the passengers inside the automobile may suffocate. Even at very small amount, exhaust gases can be toxic when inhaled. Dizziness and impaired judgment may result from the inhalation of exhaust gases. Leaking exhaust gases may remain undetected for quite some time. However, the accumulation of these gases may reach dangerous level.

One of the toxic byproducts of combustion is carbon monoxide. It is hard to detect because it is odorless and colorless. If the exhaust gasket of the engine is defective, carbon monoxide may buildup at a dangerous level. This gas destroys body cells, particularly brain cells, by competing with oxygen. Symptoms of carbon monoxide poisoning include drowsiness and fainting. Carbon monoxide is lethal at higher concentration. It silently kills its victims. A victim may first pass out and eventually succumb to coma or death. A victim may already be inhaling carbon monoxide without even knowing about it. Exhaust gaskets prevent the leak of exhaust gasket. The risk of suffocation from exhaust gases is significantly minimized.

An exhaust gasket prevents the premature entry of air into the combustion chambers after the exhaust stroke. This is necessary to create a partial vacuum inside the combustion chamber as the exhaust gases exit. Because of the partial vacuum, the pistons are pulled back to their original position while air is drawn in to start the cycle all over again. Basically, a gasoline engine undergoes a four-stroke cycle of combustion. This cycle is also known as the Otto cycle, named after the German engineer, Nicolas Otto who designed the first four-stroke gasoline engine.

The first stage of cycle is the intake stroke. At this stage, air is drawn in and fuel is injected. Compression stroke is the second stage. It is the stage that involves the compression of the fuel/air mixture to make it more homogenous. After the fuel /air mixture is compressed, power stroke or ignition stroke follows. This is the stage where fuel/ air mixture is ignited by the sparkplugs. Consequently, great thermal energy and pressure are generated. This is the most important stage of the cycle. Finally, exhaust stroke follows. Exhaust gases are expelled from the combustion chambers. The Otto cycle would not proceed efficiently without the exhaust gasket. Parts Train offers the best aftermarket exhaust gaskets.