Vacuum Pump
TDV6 3.0L Diesel Engine
| ITEM | DESCRIPTION |
|---|---|
| 1 | Vacuum connection for exhaust gas recirculation/turbocharger control systems |
| 2 | Vacuum connection for brake booster |
| 3 | Gasket |
| 4 | Oil scavenge connection |
| 5 | Drive coupling |
| 6 | Oil inlet |
TDV8 4.4L Diesel Engine
| ITEM | DESCRIPTION |
|---|---|
| 1 | Vacuum connection for brake booster |
| 2 | Vacuum connection for exhaust gas recirculation/turbocharger control systems |
| 3 | Oil scavenge connection |
| 4 | Gasket |
| 5 | Oil inlet |
| 6 | Drive coupling |
V8 5.0L S/C and V6 3.0L S/C Engine
| ITEM | DESCRIPTION |
|---|---|
| 1 | Brake vacuum pipe connection |
| 2 | Cover |
| 3 | Vane |
| 4 | Oil tube |
| 5 | Drive coupling |
| 6 | Seal |
| 7 | Rotor |
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 S/C and V6 3.0L S/C 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: TURBOCHARGER - Turbocharger - TDV6 3.0L Diesel, Description and Operation) , ENGINE EMISSION CONTROL - TDV6 3.0L DIESEL/TDV6 3.0L DIESEL - GEN 1.5/TDV6 3.0L DIESEL - GEN 2 (G2284104) , ENGINE EMISSION CONTROL - V6 S/C 3.0L PETROL (G2154007) , and ENGINE EMISSION CONTROL - V8 S/C 5.0L PETROL (G2284105) ,
On the INGENIUM I4 2.0L Diesel engine the vacuum pump is integral with the engine oil pump.
The Variable Flow Oil Pump with Integral Vacuum Pump is located in the engine sump and bolted to the cylinder block from below. It is driven by the crankshaft via a chain. The chain is immersed in oil and has no tensioner, pretensioning is defined by the axial spacings between the pump and crankshaft.
The vacuum pump induces air from the brake servo through a vacuum line and port in the cylinder block. The air extracted from the brake servo flows through a vacuum pipe connector, equipped with a one way valve, preventing oil ingress into the brake system. The air is vented into the combustion chamber via a reed valve.