Variable Flow Oil Pump With Integral Vacuum Pump

ITEM	DESCRIPTION
1	Vacuum exhaust valve
2	Oil pump housing
3	Solenoid
4	Eccentric control ring
5	Vanes with rotor
6	Oil pump housing
7	Calibrated spring
8	Oil pump housing
9	Vacuum pump vanes
10	Vacuum pump housing
11	Pump drive sprocket
12	Bolt

On V8 5.0L SC, V6 3.0L SC and V8 Naturally Aspirated (NA) engines, the vacuum pump is installed on the front of the engine sump body and driven by the auxiliary camshaft. A drive coupling on the pump rotor engages with slots in the front of the auxiliary camshaft. An oil tube in the center of the rotor supplies engine oil from the auxiliary camshaft to lubricate and cool the vacuum pump. Drain oil and air from the brake booster and vacuum pipes is expelled into the engine sump through the sump body.

On diesel engines, the vacuum pump is installed either on the front (TDV8 4.4L engines) or rear (TDV6 3.0L engines) of the right cylinder head and driven by the inlet camshaft. A drive coupling on the pump rotor engages with slots in the end of the inlet camshaft. The vacuum pump is lubricated and cooled by engine oil supplied from a gallery in the cylinder head to an inlet on the mating face of the vacuum pump. Drain oil and air from the brake booster and vacuum pipes is expelled into the camshaft cover, together with oil from the scavenge tube connected to the oil pan.

On diesel engines, the vacuum pump has an additional vacuum connection, which is connected to the Exhaust Gas Recirculation (EGR) system and the turbocharger control system.

For additional information, refer to: FUEL CHARGING AND CONTROLS (TDV6 3.0L DIESEL) / FUEL CHARGING AND CONTROLS (V6 S/C 3.0L PETROL) / FUEL CHARGING AND CONTROLS (V8 S/C 5.0L PETROL) / ENGINE EMISSION CONTROL (V6 S/C 3.0L PETROL) / ENGINE EMISSION CONTROL (TDV6 3.0L DIESEL) .