An exhaust flange gasket is a round gasket commonly referred to as a donut gasket. In the simplest of terms, the gasket helps your engine breathe. Depending on your engine and vehicle type, the exhaust manifold can either be a set of pipes or a cast iron manifold assembly. Essentially the exhaust manifold takes the burned exhaust gases from the cylinders and ejects the gas through the exhaust system and out through the tail pipes. The purpose of the gasket is to seal the surface of the manifold to the cylinder head, preventing leaks in the system.

As time passes, the constant expansion and contraction of the components may cause the exhaust gasket to leak. This is commonly due to the constant heating and cooling in the engine. These hazardous leaks need to be recognized and serviced accordingly, as hot exhaust gases escape and can damage other components in the engine compartment. In addition, a leaky exhaust manifold gasket can impact your vehicle’s engine performance.

The material that an exhaust gasket is manufactured from is required to withstand extreme heat and pressure. Many gaskets are made of woken strands of fire-resistant material, like asbestos. The gasket is forced between two surfaces of the exhaust (as mentioned above) to fill any spaces that could allow the exhaust to escape from the system. A gasket that has gone bad will let you know this by creating an engine sound that ranges from a ticking noise to a very loud roar. This all depends on how severe the void is, and should not be ignored. Apart from being aggravating to listen to, the bad gasket, if not changed, can rob your engine of power and damage components in it like the exhaust valves.

Most donut gaskets are heavy-duty and fire-resistant; however, there are many other types out there to consider. Flexible graphite gaskets can withstand high temperatures, as well as reduce warping and the need for re-torqueing. Some gaskets contain rubber, which can burn out when you expose it to heat, therefore creating a warped gasket that may allow exhaust leaks. In addition, there are metal gasket rings and composite gaskets that feature a combination of materials including steel.

Gaskets look different depending on your vehicle’s make and model. Depending on the type of car you drive, you will either see round, triangular, or oval-shaped designs with holes on either end for bolts. Since donut gaskets are dependent on what you drive, you must choose the part that works for your specific car. Feel free to contact us for help during the purchase process at 1-480-966-3040. If you don't see what you are looking for, we can direct you.