Audi Crankcase Vent Valve - Kayser 06A129101F

Product Information

The engine crankcase vent valve, also referred to as the PCV (Positive Crankcase Ventilation) valve, is part of a vehicle’s emission control system. It helps manage the pressure inside the engine’s crankcase by allowing gases that build up in the crankcase to be vented back into the intake manifold. These gases are then burned in the combustion process, reducing harmful emissions. The PCV valve also prevents oil contamination and helps maintain proper engine performance by controlling the amount of blow-by gases (unburned fuel and air mixture) escaping from the combustion chamber.

• Rough Idle or Engine Misfire: A faulty or clogged PCV valve can cause the air-fuel mixture in the engine to become unbalanced, leading to rough idling or even engine misfires, especially when the car is idling.
• Oil Consumption: A faulty vent valve can cause pressure to build up inside the crankcase, which may push oil out through seals or gaskets, resulting in oil leaks. Excessive pressure can also force oil into the intake manifold, leading to increased oil consumption.
• Sludge Buildup: If the valve is stuck closed or blocked, the blow-by gases can’t escape the crankcase properly. This can cause condensation and oil to mix, forming sludge inside the engine. This sludge can block oil passages, leading to lubrication issues and engine damage over time.

About Kayser

Founded in 1709 by the Borcholt brothers of the Woollens factory, KAYSER has been active as a manufacturer and partner in economy for more than 300 years. Since 1928 KAYSER has been in the possession of the current owning family who entered the automobile industry in 1960. Due to the constant growth, the textile division was separated from the automotive section in 1960. Since then another eight international production sites as well as sales offices in America, Asia and Europe were added to the company to keep up with the ever expanding markets. As a global company, which is still family owned and committed to this day, they specialize in creating high quality modules and ready to install systems which they supply to almost all Automotive OEM and Tier 1 suppliers across the globe.