This assembly is a modification for the Positive Crankcase Ventilation (PCV) system on certain diesel engines produced between 2004.5 and 2005. It allows users to redirect crankcase gases away from the intake, preventing oil buildup in the intercooler and intake tract. It typically includes hoses, fittings, and a catch can or filter, depending on the design.
Installing such a modification offers several advantages. Preventing oil accumulation in the intake system can enhance engine efficiency and reduce the likelihood of issues like decreased turbocharger performance and increased soot buildup in the exhaust system. The modification also helps maintain cleaner intake components, potentially extending their service life and improving overall engine performance. The technology builds on established methods of crankcase ventilation management, adapted for specific engine designs.