What Is the Purpose of Valve Cover Breathers?

Valve cover breathers help to preserve a vehicle's engine.

A vehicle's valve cover helps prevent oil from spilling from the engine's cylinder head. Valve cover breathers are vents that are placed on top of valve covers. They have several purposes.

Pressure Control

Valve cover breathers prevent pressure from developing in the crankcase. They also promote air circulation in the crankcase, preventing oil temperatures from rising.

Engine Durability

A crankcase with persistent high pressure levels can place a considerable amount of strain on an engine. A valve cover breather works to preserve the functionality and durability of an engine by controlling the pressure levels.

Oil Maintenance

If the oil in a vehicle is heated and reaches damaging temperatures, it can quickly become burnt and dirty, requiring it to be changed more often. Valve cover breathers help keep oil stabilized and clean by regulating its temperature.

References

• Metco Motor Sports: Valve Cover Breather
• Car Parts Wholesale: Valve Cover