Engine Control Systems: VOLVO: VOLVO: Description

The 4 cylinder crankcase ventilation system consists of an oil trap, flame guard, and PCV valve which are located in valve cover, vacuum hose to intake manifold, nipple, and a hose to air cleaner. The 4 cylinder Turbo system consists of an oil trap, PCV valve, and a vacuum hose to turbo-compressor intake. The 6 cylinder crankcase ventilation system consists of an oil filter cap with one hose to air cleaner and a vacuum hose that divides and goes to right and left bank of intake manifold. There is a PCV valve on each bank of intake manifold (where vacuum hose attaches).