What is crankcase breather?

A crankcase breather, also known as a crankcase ventilation system, is a component of an internal combustion engine that allows crankcase gases to be released into the atmosphere instead of building up in the engine. The breather helps to prevent pressure buildup inside the crankcase, which can lead to oil leaks, engine damage, and reduced performance.

The crankcase breather typically consists of a valve or filter that allows excess gases to escape from the crankcase while preventing debris and oil from entering the engine. Some systems may also include a PCV (positive crankcase ventilation) valve, which helps to regulate the flow of gases and reduce emissions.

Regular maintenance of the crankcase breather is important to ensure proper engine performance and prevent any potential issues. This may include checking the breather for clogs or damage, replacing the breather filter if necessary, and inspecting the PCV valve for proper functioning.

Overall, the crankcase breather plays a vital role in maintaining the health and longevity of an engine by allowing harmful gases to be safely expelled from the crankcase.