Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

19FUEL SYSTEM
22
REPAIR RAM HOUSING
Service repair no - 19.70.04
Remove
1.Disconnect battery negative lead.
2.Remove plenum chamber.
See plenum
chamber
3.Disconnect 3 hoses from ram housing.
4.Remove 6 bolts securing ram housing to inlet
manifold.
5.Using a suitable lever and a block of wood,
release ram housing from inlet manifold.
Remove ram housing.
CAUTION: Do not use a mallet to break
sealant joint with inlet manifold.
6.Place a protective cover over inlet bores to
prevent ingress of dirt.Refit...

SFI
23
REPAIR WHEEL SPEED SENSOR - FRONT
Service repair no - 19.80.01
Remove
CAUTION: If a sensor is removed for any
reason, a NEW sensor bush and seal must
be fitted.
1.Disconnect battery negative lead.
2.Release wheel speed sensor multiplug from clip
on inner wing [fender] and disconnect.
3.Raise vehicle on 4 post ramp.
4.Release cable ties securing sensor harness to
chassis and front axle.
5.Clean area around sensor to prevent possible
ingress of dirt.
6.Using a suitable lever, release sensor from...

19FUEL SYSTEM
24
REPAIR 19.Position brake hose to mounting bracket and
secure with nut.
20.Connect brake pipe to hose and, using 2
spanners, tighten union.
21.Remove clamp from brake hose.
22.Ensure sensor body is clean and coat with EP
90 oil.
23.Fit sensor through bush until it contacts the
reluctor ring. The sensor will be knocked-back
to the correct position when the vehicle is driven.
24.Route sensor lead up through engine
compartment and secure cable ties.
25.Lower vehicle.
26.Connect sensor...

SFI
25
REPAIR
6.Release sensor harness from clips on rear axle.
7.Remove 6 bolts, 3 each side, securing rear
wheel brake caliper mud shields.
8.Remove mud shields and clear area around
sensor to prevent possible ingress of dirt.
9.Using a suitable lever, release sensors from
mounting bushes.
10.Remove sensors.
11.Remove and discard sensor bushes.Refit
12.Ensure NEW sensor bushes and housings are
clean, then fit bushes.
13.Ensure sensor bodies are clean and lightly coat
with EP 90 lubricant.
14.Fit...

19FUEL SYSTEM
26
REPAIR ECU - ROUGH ROAD DETECTION
Service repair no - 19.80.03
Remove
1.Disconnect battery negative lead.
2.Release front edge of passenger seat cushion
and remove cushion.
3.Release clip and remove ECU cover plate.
4.Remove 2 bolts securing ECU to mounting
bracket and collect nuts.
5.Remove ECU from mounting bracket and
disconnect multiplug.
6.Remove ECU.Refit
7.Fit ECU, connect multiplug and position to
mounting bracket.
8.Secure ECU mounting bracket with nuts and
bolts.
9.Fit ECU...

SFI
1
SPECIFICATIONS, TORQUE TORQUE SETTNGS
Nm lbf ft
Intake air temperature (IAT) sensor 8................................. 6
Crank position sensor 8...................................................... 6
Coolant temperature sensor 20............................................. 15
Fuel filter 30.......................................................................... 20
Fuel pressure regulator 10.................................................... 7
Coil bracket...

COOLING SYSTEM
1
DESCRIPTION AND OPERATION ENGINE COOLING
Description
The V8i engine uses a pressurised cooling system
and cross flow radiator which is supplied from a
separate expansion tank. The coolant radiator also
incorporates a section at the side for cooling the
engine oil. The transmission fluid cooler is mounted
below the radiator.The belt driven viscous fan and centrifugal water
pump is located in the engine front cover with ports for
circulation of coolant to both banks of cylinders and...

26COOLING SYSTEM
2
DESCRIPTION AND OPERATION COOLANT CIRCULATION
Operation
When the engine is started from cold the thermostat
prevents any coolant circulation through the radiator
by closing off the top hose. During the engine warm
up period, the water pump, pumps coolant around the
cylinders to the rear of the cylinder block along the
main galleries in both cylinder banks. At the rear of
the cylinder block the coolant rises through a large
port in each cylinder head/block joint face, and then
flows...

COOLING SYSTEM
3
DESCRIPTION AND OPERATION VISCOUS FAN
Description
The viscous drive unit for the engine cooling fan,
provides a means of controlling the speed of the fan
relative to the running temperature of the engine. The
viscous unit is a type of fluid coupling, which drives
the fan blades by means of silicone fluid.
1.Input (drive) member
2.Output (driven) member
3.Sensing mechanism (bi-metal coil)
The fan drive has to be engaged only periodically,
between 5% and 10%, during normal operating...

26COOLING SYSTEM
4
DESCRIPTION AND OPERATION When this clearance is filled with viscous fluid, a
shearing action, caused by the speed differential
between the two drive components, transmits torque
to the fan. The fluid is thrown to the outside of the unit
by centrifugal force from where it is recirculated to the
reservoir (10) via the pump plate (4) adjacent to the
drive member.
If the engine speed is increased the amount of slip will
also increase to limit the maximum fan speed.
When the air...