VW Breather System Kit - Hengst 523387KT2

Product Information

An engine crankcase breather hose is a primary component of an engine’s positive crankcase ventilation system, funneling pressurized air from the engine crankcase to the air/oil separator, also known as the PCV valve. The PCV valve, or air/oil separator, is designed to capture and remove oil vapors from the pressurized crankcase air, allowing them to drain back to the engine, while the pressurized air is fed to the intake side of the engine and utilized as part of normal combustion.

An engine develops positive crankcase pressure as a byproduct of the overall combustion process. Because of the combination of pressure, heat, and the air/oil-vapor mixture traveling to the PCV valve, the engine crankcase breather hose is a common failure item within the PCV system and is crucial to your car’s engine’s performance and emissions compliance.

• Cracks breaks, leaks: Over time, your engine crankcase breather hose can be easily damaged because of constant exposure to oil vapors, heat, and pressure from the engine. The engine oil can slowly break down the plastic or rubber materials, eventually causing an air leak. This can happen naturally, or because it is damaged from external contact.
• Broken connectors: Plastic can become brittle over time, especially when exposed to heat and oil, and it’s easy to break one of the securing clips or connectors for a PCV hose, either during removal or during other services.
• Broken or damaged hose: Soft rubber or brittle plastic, depending on the material of the hose, can result in an obvious hole or split in an engine crankcase breather hose, usually accompanied by one of the other faults listed below.
• Check Engine Light: Excessive unmetered air from a failed engine crankcase breather hose can result in a CEL for an air intake leak fault or other airflow-related diagnostic trouble codes.
• Misfire: A severe air intake leak can cause rough running and an engine misfire, a common side effect of a bad engine crankcase breather hose or PCV Valve
• Oil residue on or around the hose or adjacent components: As engine crankcase vapors escape from a faulty engine crankcase breather hose, the hose, engine block, and adjacent components are likely to become visibly soiled with oil residue and moisture. In the most severe cases, you will smell burning or burnt oil, and you may need to degrease the area to determine the exact cause of the oil residue.

About Hengst

Hengst Filtration is a family-owned company founded in Münster, Westphalia, in 1958. With more than 3,600 employees at 25 locations worldwide, Hengst develops innovative solutions in filtration and fluid management.

Hengst supplies technologically leading filtration systems in the fields of plant and mechanical engineering, industrial filtration, hydraulics, Life Science, and Health Care. Hengst's customized solutions are used in medical cleanrooms, air conditioning systems, cleaning equipment, industrial plants, power tools, and robots. Hengst is also a series supplier to the international vehicle and engine industry and a development partner for sustainable drive and mobility concepts.

Hengst Filtration thus makes future-oriented technologies possible in all industries worldwide. The Hengst brand has stood for top quality in filtration for 65 years. Initially known as "H-Filter for oil, fuel, and air", we have been developing and manufacturing filtration and fluid management solutions for renowned automotive and engine manufacturers since the very beginning. Hengst is now a recognized brand for many areas of application in the automotive industry.

Hengst develops innovative solutions for well-known manufacturers and therefore also stands for OEM quality in the service parts sector. This means you can rely on Hengst solutions for the entire life of the product.