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,...

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...

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
(G421093) Technical Training24
Lesson 2 – PowertrainEngine 

For cold climate markets an engine block heater is fitted,
which is located at the front of the LH side of the
cylinder block.
EngineLesson 2 – Powertrain
25Technical Training (G421093) 

CRANKSHAFT, SUMP AND OIL PUMP COMPONENTS
Tensioner1Chain2
(G421093) Technical Training26
Lesson 2 – PowertrainEngine 

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
EngineLesson 2 – Powertrain
27Technical Training (G421093) 

Crankshaft and Main Bearings
Main bearing cap1Main bearing, lower2
(G421093) Technical Training28
Lesson 2 – PowertrainEngine 

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...

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...

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...