Land Rover Discovery: Oil Pan

1. Flange bolt
2. Sprocket
3. Variable flow oil pump with integral vacuum pump
4. Oil level gauge
5. Oil level gauge tube
6. Bolt (4 off)
7. Oil pan
8. Bolt (16 off)
9. Sealing washer
10. Drain plug

The oil pan is cast from aluminum alloy using a high pressure die cast process and is located on the underside of the cylinder block. It is sealed to the cylinder block with a 3 mm bead of RTV sealant and secured with fourteen bolts and two shoulder bolts that help locate the oil pan to the block. The oil pan contains the variable flow oil pump with integral vacuum pump, pick up pipe, windage tray and dipstick. The oil is drained via removal of a drain plug and washer located on the side of the oil pan.

CYLINDER HEAD

1. Screw (10 off)
2. Chain cover and gasket
3. Camshaft carrier
4. Engine vent module
5. Screw (8 off)
6. Exhaust camshaft
7. Camshaft caps (8 off0)
8. Screw (20 off)
9. Roller finger cam follower (16 off)
10. Inlet and exhaust valve assemblies (16 off)
11. Cylinder head gasket
12. Cylinder head
13. Screw (4 off)
14. Cylinder head bolt (10 off)
15. Camshaft cap
16. Variable Camshaft Timing (VCT) actuator
17. Inlet camshaft

The cylinder head is cast from aluminum alloy and heat treated. The cylinder head provides location for sixteen valves, four injectors, four glow plugs and one cylinder head temperature sensor. The cylinder head is cooled by a double layer water jacket. Each cylinder has four valves.

Each cylinder is served by four valves. To help achieve the required gas-flow characteristics, the cylinder head has two inlet ports and two exhaust ports arranged asymmetrically around each cylinder bore. The four centrally mounted injectors are located on the upper side of the cylinder head and direct fuel into the combustion chamber. The injectors are retained in the cylinder head by injector clamps and screws located on the camshaft carrier.

To help achieve the required gas-flow characteristics, the fuel injectors are mounted centrally in the combustion chamber.

Four glow plugs are located in the cylinder head. The glow plugs fit into threaded ports between the inlet port for each cylinder, allowing the tip of each glow plug to protrude into the combustion chamber.

1. Glow plug (4 off)
2. Fuel injector (4 off)
3. Inlet valves (8 off)
4. Exhaust valves (8 off)

The aluminum cylinder head is designed to react to the high diesel combustion cylinder pressures, while also providing a platform onto which the structural camshaft carrier can be mounted.

The cylinder head gasket is of a multi-layer steel construction.

Pistons and Connecting RodsCamshaft Carrier

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