Rocker Lever Cover Mounted Crankcase Breather Remove all protective caps. Install the closed crankcase ventilation hose(s). Secure the hose clamps. Install any fasteners that secure the hose(s) to the engine. Rear Engine Mounted Crankcase Breather Remove all protective caps. Install the closed crankcase ventilation hose(s). Secure the hose clamps. Install any fasteners that secure the… Read More »
Inspect the crankcase ventilation hose(s) internally for obstructions or sludge buildup. Blockages must be removed to reduce the possibility of crankcase pressure buildup. If a blockage is found, the crankcase ventilation hose(s) must be cleaned with a strong solution of detergent and water or replaced. Dry the hose(s) with compressed air. Check the crankcase ventilation… Read More »
Rocker Lever Cover Mounted Crankcase Breather Remove any fasteners securing the closed crankcase ventilation hose(s) to the engine. Remove the hose clamps. Remove the closed crankcase ventilation hose(s). Use protective caps from the Air Handling Clean Care Kit, Part Number 4919498, to cover open connections to prevent debris from entering the air handling system. Rear… Read More »
The closed crankcase ventilation hose connects the closed crankcase ventilation valve outlet to the air intake system. The connection point at the air intake system will vary depending on the application. The connection point will either be: • In the turbocharger compressor housing • In the OEM air intake system plumbing
Rocker Lever Cover Mounted Crankcase Breather Insert the diaphragm into the crankcase ventilation filter cover cavity so the flat center circle of the diaphragm rests on the cast-in standoffs in the crankcase ventilation filter cover. Place the spring in the center of the diaphragm around the flat center circle Align the closed crankcase ventilation valve… Read More »
Rocker Lever Cover Mounted Crankcase Breather Clean the closed crankcase ventilation valve housing, spring and diaphragm in warm soapy water. Dry with compressed air. Inspect the crankcase ventilation valve housing, spring and diaphragm damage. Pay close attention to the diaphragm. Inspect for cracks, tears, and brittleness. Replace any damaged component. Rear Engine Mounted Crankcase Breather… Read More »
Rocker Lever Cover Mounted Crankcase Breather Remove the closed crankcase ventilation valve mounting capscrews. Remove the closed crankcase ventilation valve housing, spring and diaphragm. Rear Engine Mounted Crankcase Breather Remove the closed crankcase ventilation valve mounting capscrews. Disconnect the hose connection between the crankcase ventilation filter housing and the crankcase ventilation valve. Remove the crankcase… Read More »
If troubleshooting high crankcase pressure, the following items can cause the closed crankcase ventilation valve to close during engine operation: • High air intake restriction. Refer to Procedure 010-031 in Section 10. • A restricted crankcase ventilation filter. Refer to Procedure 003-021 in Section 21 .. • A malfunctioning or misassembled closed crankcase ventilation valve.… Read More »
The closed crankcase ventilation valve is used on engines in which the crankcase gases are vented back into the intake of the engine. The purpose of the valve is to aid in regulating crankcase gas flow to the intake of the engine. If the crankcase ventilation filter becomes too restrictive, under high intake vacuum situations,… Read More »
Rocker Lever Cover Mounted Crankcase Breather If the gasket was removed, install the gasket into the rocker lever cover groove, starting with the tab end first. Then install the corners opposite the gasket tab end. Finish by pushing in the sides (see illustration). Gently push the gasket down into the groove. Do not use a… Read More »