Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

							assembly is driven, via a chain, by the crankshaft gear
at the front of the engine. The assembly is held in
position by a thrust plate.
Front Cover and Water Pump Assembly
Water pump assembly1
Engine front cover2
Gasket3
The aluminium front cover assembly is secured to the
engine block by five bolts and five studs and is sealed
via a gasket. The front cover also houses the crankshaft
front seal.
The water pump is attached to the engine front cover
assembly and is secured and sealed, to the front cover,
by twelve bolts and a gasket. A poly-vee belt drives the
water pump via the crankshaft.
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							Oil Cooler (If Fitted) and Filter Assembly
NOTE: Variant with oil cooler shown.
O ring1
Adapter2
O ring3
O ring4
Adapter mounting bolt5
Cooler assembly (if fitted)6
Oil filter7
A full-flow, disposable canister-type oil filter is attached
to the oil cooler assembly (if fitted).
The oil filter and cooler assembly (if fitted) is attached
the rear RH side of the cylinder block and consists a
full-flow, disposable canister-type filter, cooler (if fitted)
and an adapter.
The filter adapter-mounting bolt locates in the cylinder
block oil gallery and is sealed by an O ring. The filter
adapter houses the adapter bolt and is also sealed to the
cylinder block by an O ring.
The oil cooler (if fitted) keeps the engine lubrication oil
cool, under heavy loads and high ambient temperatures
and is cooled by the engine cooling system.
Oil is delivered to and from the oil cooler (if fitted)
through galleries in the cylinder block. Hoses from the
engine cooling system are connected to two pipes on
the oil cooler for the supply and return of coolant.
Knock Sensors
RH knock sensor1
LH knock sensor2
The knock sensors are installed in the cylinder block in
two different locations. One is located on the inboard
of the RH cylinder bank and one is located at the front
of the LH side of the cylinder block, next to the oil
pressure switch. They are piezo-electric sensors that
provide inputs to detect and locate detonation during
combustion.
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							Oil Pressure SwitchOil Pressure Switch1
The oil pressure switch is located in a port at the front
LH side of the cylinder block. It detects when a safe
operating pressure has been reached during engine
starting and initiates the illumination of a warning light
in the instrument cluster if the oil pressure drops below
a given value. The switch operates at a pressure of 0.15
to 0.41 bar (2.2 to 5.9 psi).
Engine Block Heater
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							For cold climate markets an engine block heater is fitted,
which is located at the front of the LH side of the
cylinder block.
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							CRANKSHAFT, SUMP AND OIL PUMP COMPONENTS
Tensioner1Chain2
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							Balance shaft assembly3
Main bearing, upper4
Main thrust bearing, upper5
Crankshaft6
Crankshaft oil seal, rear7
Main thrust bearing, lower8
Main bearing, lower9
Main bearing cap, rear10
Intermediate shaft11
Oil pump12
Pick-up pipe adapter13
Ladder frame14
Oil pick-up pipe15
Sump16
Crankshaft oil seal, front17
Key18
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							Crankshaft and Main Bearings
Main bearing cap1Main bearing, lower2
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							Key3
Crankshaft4
Main bearing, upper5
Main bearing, thrust6
The crankshaft is supported on four main bearings, with
each pair of crankpins mutually offset by 30 degrees to
give equal firing intervals. Cast in Spheroidal Graphite
(SG) iron, the crankshaft has cold rolled fillets on all
journals, except the outer mains, for toughness and
failure resistance. The nine crankshaft counterweights
increase smoothness and reduce bearing wear by
splitting the loads evenly across the bearings. Thrust
washer halves at the top and bottom of number three
main bearing control end-float.
Oil grooves are provided in the upper and lower halves
of all the main bearing shells to supply oil, via drillings
in the crankshaft, to the connecting rod big-end bearings.
Balance Shaft Assembly
Drive chain1
Tensioner assembly2
Balance assembly3
Chain guide4
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							A 60 degree V6 is often thought of inherently balanced,
because its first-order forces can be compensated by
crankshaft counter-weighting. However, the V6 4.0L
engine generates a second-order unbalanced at twice
the crank speed.
To achieve the desired smoothness, the V6 4.0L engine
includes a unique counter-rotating balance shaft, which
is chain driven by the crankshaft and runs at twice
engine speed. The shaft produces an opposite
second-order force, which cancels the inherent
unbalance.
Since the balance shaft is positioned on the bottom the
cylinder block, on the RH side and is secured by 4 bolts.
Because the unit is near the engine oil level, it is encased
in a steel tube to avoid aerating the oil. The balance
shaft attaches to the engine as an assembled unit,
including an integrated gear and lubrication system. The
gear is needed to rotate the shaft in the same direction
as the unbalanced force.
Crankshaft Oil Seals
RearA
FrontB
Rear seal1
Front cover2
Front seal3
The rear crankshaft oil seal is a press fit in the rear of
the cylinder block. The front crankshaft oil seal is
located in the engine front cover assembly, just below
the water pump.
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							Oil Pump
Oil pump1
Pick-up pipe adapter assembly2
Intermediate shaft3
Clamp4
Drive assembly5
The oil pump is located on the RH rear underside of the
cylinder block, contained within the ladder frame
assembly, and is secured by two bolts. The unit is driven
by the jackshaft, via an intermediate shaft, and receives
its oil feed from the main gallery via drillings in the
cylinder block. The intermediate shaft locates through
the cylinder block and is connected to the drive
assembly, which is situated in the V at the rear of the
engine and held in place via a clamp. The oil pump
housing includes the oil pressure relief valve.
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