S40 L5-2.5L Turbo VIN 68 B5254T3 (2005)
Oil Separator: Description and Operation
Function
Flame trap
The flame trap roughly separates the crankcase gases from the cylinder block. The crankcase gases circulate around the walls in the flame trap before
entering the cyclone separators. The cyclone separators act on the crankcase gases to separate the particles/substances. The oil in the crankcase gas
runs down into a container chamber to be returned to the oil pan. The rest of the crankcase gas is directed on to a pressure regulator which regulates
the pressure in the crankcase. The crankcase gas is then evacuated from the pressure regulator to return to the intake manifold via the turbocharger on
vehicles with turbocharged engines. Otherwise the gas returns directly to the intake manifold.