Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

Sensor ring2
Timing rings for each camshaft position sensor are
located at the rear of both intake camshafts. A flat,
machined near the front of each camshaft, enables the
camshafts to be locked during the valve timing
procedure.
Camshaft Position Sensor
The camshaft position sensors are installed in each
cylinder head at the rear of the intake camshaft. It is a
variable reluctance sensor that provides an input to the
ECM regarding the position of the camshaft.
Inlet and Exhaust Valves
Each cylinder head...

Fuel Injectors
Eight, top fed, eight hole, fuel injectors are installed in
the fuel rails. The injectors are electromagnetic solenoid
valves controlled by the ECM. Two O-rings seal each
injector to manifold interface. The fuel jets from the
injectors are directed onto the back of the intake valves.
VARIABLE VALVE TIMING (VVT)
The continuously VVT unit turns the intake camshaft
in relation to the primary chain to advance and retard
the timing.
The system improves low and high-speed engine
performance,...

•Improves fuel economy by optimising torque over
the engines speed range.
This system also has the added benefits of operating at
a lower oil-pressure and faster response time when
compared to a non-VVT system.
Variable Valve Timing Operation
RetardedA
AdvancedB
Engine oil pressure1
The VVT unit is a hydraulic actuator mounted on the
end of the intake camshaft, which advances or retards
the intake camshaft timing and thereby alters the
camshaft to crankshaft phasing. The oil control solenoid,
controlled...

Engine oil properties and temperature can affect the
ability of the VVT mechanism to follow demand
changes to the cam phase angle. At very low
oil-temperatures, movement of the VVT mechanism is
sluggish due to increased viscosity, and at high
oil-temperatures the reduced viscosity may impair
operation if the oil pressure is too low. To maintain
satisfactory VVT performance, an increased capacity
oil pump is installed, plus an engine oil temperature
sensor to enable monitoring by the ECM. The VVT
system...

LUBRICATION SYSTEM
General
Oil is drawn from the reservoir in the oil pan and
pressurised by the oil pump. The output from the oil
pump is then filtered, cooled and distributed through
internal oil passages.
All moving parts are lubricated by pressure or splash
oil. Pressurised oil is also provided for operation of the
variable valve timing units and the timing gear chain
tensioners.
(G421094) Technical Training76
Lesson 2 – PowertrainEngine 

The oil returns to the oil pan under gravity. Large drain
holes through the cylinder heads and cylinder block
ensure the quick return of the oil, reducing the volume
of oil required and enabling an accurate check of the
contents soon after the engine stops.
System replenishment is through the oil filler cap on
the B bank camshaft cover.
With the exception of the pump, all oil system
components are installed on the structural sump.
Oil Pick-up
The fabricated steel oil pick-up is immersed in the oil...

The oil pump is installed on the crankshaft at the front
of the engine. The pump inlet and outlet ports align with
oil passages in the bedplate.
The pumping element is an eccentric rotor, which is
directly driven by flats on the crankshaft. An integral
pressure relief valve regulates pump outlet pressure at
4.5 bar (65.25 psi).
Oil Filter and Oil Pressure Switch
The oil filter is a replaceable cartridge installed on an
adapter. An internal bypass facility permits full flow
bypass if the filter is...

Oil Level Gauge
The oil level gauge locates along the left side of the oil
pan, supported in a tube installed in the sump. Two holes
in the end of the gauge indicate the minimum and
maximum oil levels. There is a difference of
approximately 1.5 litres (1.58 US quart) between the
two levels.
EngineLesson 2 – Powertrain
79Technical Training (G421094) 

EXHAUST MANIFOLD
The fabricated stainless steel twin skin exhaust
manifolds are unique for each cylinder bank. The B
bank manifold has a connection for the EGR transfer
pipe.
Spacers on the securing bolts allow the manifolds to
expand and retract with changes of temperature while
maintaining the clamping loads.
Heat shields are integrated into the exhaust manifold
gaskets.
(G421094) Technical Training80
Lesson 2 – PowertrainEngine 

External View
GENERAL
The TdV6 engine is a 2.7 litre, direct injection,
six-cylinder diesel engine having two banks of three
cylinders, arranged at 60 degrees to each other. There
are 4 valves per cylinder, which are operated by two
overhead camshafts per cylinder bank. The engine
emission comply with ECD3 (European Commission
Directive) legislative requirements and employs two
catalytic converters, electronic engine management
control, positive crankcase ventilation and exhaust gas
recirculation to...