Description

Cyclone Breather Filter for the crankcase ventilation system on the four-cylinder 2.5L diesel engine (naturally aspirated, 200TDi and 300TDi).

Mounted to the side of the engine block, the unit acts as an oil vapour separator: crankcase gases pass through the cyclone chamber where oil mist is condensed and drained back to the sump, while the cleaned air is vented to the intake. This keeps oil vapour out of the air intake.

The filter is prone to clogging in service, and a blocked unit can allow oil to be drawn into the intake and cause smoking or fouling. It is therefore a routine maintenance replacement item.