Oil Restrictors & Lifter Valley Breather Tubes

What Does an Oil Breather Tube Do?

An oil breather tube, also known as a breather hose, is a vital component of an engine's crankcase ventilation system. Its main function is to allow gases and vapors that accumulate in the crankcase during engine operation to be vented safely to the atmosphere. This process helps prevent excess pressure buildup within the crankcase, which could otherwise lead to oil leaks, reduced engine efficiency, and potential damage to engine seals and gaskets.

The breather tube is connected to the valve cover or the lifter valley cover, depending on the engine's design. As the engine runs, blow-by gases - combustion byproducts that escape past the piston rings - enter the crankcase. The oil breather tube provides a route for these gases to exit the crankcase and be routed back into the intake or released into the environment.

What are the Symptoms of a Bad Oil Breather Tube?

A malfunctioning or clogged oil breather tube can lead to several noticeable symptoms, including:

• Increased Oil Consumption: A bad breather tube can disrupt the proper ventilation of gases, potentially leading to increased oil consumption.
• Oil Leaks: Excessive pressure in the crankcase due to a faulty breather tube can result in oil leaks from various engine seals.
• Reduced Engine Performance: An obstructed breather tube can affect engine performance by causing improper air-fuel mixture and combustion.
• Engine Misfires: A clogged breather tube can contribute to irregular engine firing and misfires.

If you experience any of these symptoms, it's advisable to have your breather tube inspected and replaced if necessary.

How Much Does an Oil Breather Tube Cost?

The cost of an oil breather tube can vary depending on the make and model of your vehicle, as well as the brand and material of the replacement tube. Basic breather tubes may be more affordable, while those designed for specific vehicle models or with enhanced features could be priced higher. JEGS offers a selection of breather tubes and hoses, including options for breather hose replacement, catering to different vehicle requirements and preferences.