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303-08B-1 Engine Emission Control 303-08B-1 SECTION 303-08B Engine Emission Control VEHICLE APPLICATION: 2011.50 Ranger CONTENTS PAGE DESCRIPTION AND OPERATION Engine Emission Control 303-08B-2 Vehicles with 2.5L Duratec-HE engine 303-08B-2 REMOVAL AND INSTALLATION Crankcase Vent Oil Separator — 2.5L Duratec-HE (122kW/165PS) - MI4 303-08B-4 Engine Emission Control 303-08B-2 303-08B-2 DESCRIPTION AND OPERATION Engine Emission Control Vehicles with 2.5L Duratec-HE engine Item Description Valve cover Air cleaner assembly Valve cover to air cleaner outlet pipe positive crankcase ventilation (PCV) hose 2011.50 Ranger G1272528en Engine Emission Control 303-08B-3 303-08B-3 DESCRIPTION AND OPERATION Item Description PCV valve to intake manifold PCV hose Crankcase vent oil separator Crankcase vent oil separator gasket PCV valve PCV System The PCV system consists of a valve mounted in the crankcase vent oil separator (attached to the cylinder block) and two hoses One PCV hose connects the PCV valve to the intake manifold, the other PCV hose connects the valve cover to the air cleaner outlet pipe Under idle and part throttle conditions, the crankcase vapor flows from the crankcase vent oil separator to the intake manifold and into the combustion chambers where the vapor is burnt during combustion Under full throttle conditions, the crankcase vapor flows from the valve cover into the air cleaner outlet pipe through the PCV hose 2011.50 Ranger G1272528en 303-08B-4 Engine Emission Control 303-08B-4 REMOVAL AND INSTALLATION Crankcase Vent Oil Separator — 2.5L Duratec-HE (122kW/165PS) - MI4 Removal NOTE: Removal steps in this procedure may contain installation details NOTE: The gasket is to be reused unless damaged NOTE: Make sure that the mating faces are clean and free of foreign material Torque: 11 Nm Installation To install, reverse the removal procedure 2011.50 Ranger G1272521en