LR3/Disco 3
M6 x 20, 6 of
M8 x 75, 4 of
M6 x 105, 8 of
Iron inserts, cast into the main bearing supports of the ladder frame, minimise main bearing clearance changes due to
heat expansion.
A gasket seals the joint between the ladder frame and the cylinder block.
A port for the oil level gauge tube is included in the casting on the LH side of the ladder frame.
An oil pick-up pipe with integral strainer locates in the front of the ladder frame to provide oil to the crankshaft driven oil
pump.
Sump
The sump consists of a pressed steel oil pan bolted to the aluminium alloy ladder frame with 14 M6 x 16 bolts. The engine
oil drain plug and the oil temperature sensor are located at the rear left corner of the sump.
A reusable gasket seals the joint between the oil pan and the ladder frame; a bead of sealant seals the joint between the
sump and the ladder frame.
Oil Temperature Sensor
The engine oil temperature sensor is located at the rear left corner of the sump. The sensor provides the ECM and the
instrument pack with the engine oil temperature status.
The sensor circuit consists of an internal voltage divider circuit which, incorporates an Negative Temperature Coefficient
(NTC) thermistor. As the engine oil temperature rises the resistance through the sensor decreases and visa versa. The
output from the sensor is the change in voltage, as the thermistor allows more current to pass to earth relative to the
temperature of the oil. For additional information, refer to
Electronic Engine Controls
(303-14C Electronic Engine
Controls - 2.7L Diesel)
Rear Oil Seal Retainer
The crankshaft rear oil seal retainer is attached to the rear of the cylinder block by ten bolts and is sealed with a rubber
seal. The retainer also houses the crankshaft position sensor.
Dual Mass Flywheel
On vehicles with manual transmission, the dual mass flywheel is bolted on the rear of the crankshaft with eight bolts. A
dowel on the crankshaft flange ensures that the flywheel is correctly located. A ring gear is fitted on the outer diameter of
the flywheel. The ring gear is not serviceable.
The dual mass flywheel is used to insulate the gearbox from torsional and transient vibrations produced by the engine.
For additional information, refer to
Clutch
(308-01 Clutch - 2.7L Diesel)
CAMSHAFT TIMING COMPONENTS
