radiator LAND ROVER DEFENDER 1996 Owner's Manual

COOLING SYSTEM
1
ADJUSTMENT DRAIN AND REFILL COOLING SYSTEM
Service repair no - 26.10.01
Draining
WARNING: DO NOT remove caps or plugs
when the engine is hot. The cooling
system is pressurised and personal
scalding could result.
1.Remove expansion tank filler cap.
2.Position a clean container under radiator if
coolant is to be reused.
3.Disconnect radiator bottom hose and allow
coolant to drain.
NOTE: A chassis undertray may be fitted
on some vehicle derivatives to conform to
legal requirements. When under chassis
remove and refit procedures are required, it may
be necessary to remove the undertray and/or
integral access panels.
See CHASSIS AND BODY,
Repair, Front undertray
orSee CHASSIS AND
BODY, Repair, Rear undertray
4.When expansion tank has emptied remove
thermostat housing plug to assist drainage.
5.Similarly when coolant is below top of radiator,
remove radiator plug.
6.Fit radiator bottom hose and fully tighten hose
clip.Refill
CAUTION: It is important that the correct
procedure is followed when refilling or
topping up the cooling system to avoid
trapping air in the system.
7.Fill cooling system with 50% - 50% of
water/anti-freeze mixture
See LUBRICANTS,
FLUIDS AND CAPACITIES, Information,
Recommended lubricants and fluids
8.Fill through expansion tank until radiator is full,
with level in expansion tank the same as
radiator.
NOTE: Care should be taken to avoid
excess coolant spillage.
9.Fit plastic plug in radiator.
10.Add a further 1 litre (1.76 pints) of coolant into
expansion tank and allow to settle.
11.Refit expansion tank cap and thermostat
housing plug.
12.Run engine at idle speed for 5 minutes.
13.Switch off engine and allow to cool.
14.Check that coolant in expansion tank is level
with top of indicator post. Top up if necessary.

26COOLING SYSTEM
2
REPAIR FAN COWL
Service repair no - 26.25.11
Remove
1.Disconnect battery.
2.Drain coolant.
See Adjustment, Drain and
refill cooling system.
3.Slacken retaining clips and remove radiator top
hose.
4.Slacken retaining clip and remove top hose from
intercooler.
NOTE: On vehicles fitted with EGR system,
remove complete intercooler top hose
assembly.
5.Remove viscous coupling and fan
See Viscous coupling and fan.
6.Remove 2 nuts securing top of fan cowl.
7.Release expansion tank hose from clips at base
of fan cowl.
8.Lift and remove cowl .
NOTE: On vehicles fitted with air
conditioning, it will be necessary to
remove the cowl and viscous fan unit
together to enable clearance of the compressor.Refit
9.Position fan cowl.
10.Fit viscous fan unit.
See Viscous coupling
and fan
11.Fit expansion tank hose into fan cowl clips.
12.Secure top of fan cowl to radiator top cover.
13.Fit intercooler top hose.
14.Fit radiator top hose.
15.Refill cooling system.
See Adjustment, Drain
and refill cooling system
16.Reconnect battery.
FAN PULLEY
Service repair no - 26.25.04.
Remove
1.Disconnect battery.
2.Remove viscous fan unit.
See Viscous
coupling and fan
3.Remove drive belt.See ELECTRICAL, Repair,
Auxiliary drive belt
4.Unscrew 4 bolts and remove pulley from adaptor
boss.
Refit
5.Fit fan pulley to adaptor boss. Tighten bolts to
25
Nm (18 lbf/ft).
6.Fit drive belt.See ELECTRICAL, Repair,
Auxiliary drive belt
7.Fit viscous fan unit.See Viscous coupling
and fan
8.Reconnect battery.

COOLING SYSTEM
3
REPAIR WATER PUMP
Service repair no - 26.50.01
Remove
1.Disconnect battery.
2.Drain cooling system.
See Adjustment, Drain
and refill cooling system
3.Remove radiator top hose.
4.Remove intercooler top hose.
5.Slacken water pump and power steering pump
pulley retaining bolts.
6.Remove drive belt.
See ELECTRICAL, Repair,
Auxiliary drive belt
7.Unscrew flange nut and remove belt tensioner.
8.Remove oil filler cap and remove rocker cover
insulation.
9.Slacken retaining clip and disconnect hose at
heater rail.
10.Unscrew 3 bolts and remove water pump pulley.
11.Unscrew 3 bolts and remove power steering
pump pulley.
12.Remove 8 bolts securing water pump, noting
location of 3 through bolts into cylinder block.
13.Withdraw pump and gasket from auxiliary
mounting bracket.
14.Clean all gasket material from mating faces.
Refit
15.Using new gasket, fit water pump to mounting
bracket. Tighten bolts to
25 Nm (18 lbf/ft).
16.Fit power steering pump pulley.
17.Fit water pump pulley. Tighten bolts of both
pulleys to
25 Nm (18 lbf/ft).
18.Fit drive belt.See ELECTRICAL, Repair,
Auxiliary drive belt
19.Fit hose at heater rail.
20.Fit rocker cover insulation and oil filler cap.
21.Fit drive belt tensioner. Tighten retaining nut to
45 Nm (33 lbf/ft).
22.Fit intercooler top hose.
23.Fit radiator top hose.
24.Refill cooling system.
See Adjustment, Drain
and refill cooling system
25.Reconnect battery.

26COOLING SYSTEM
4
REPAIRREV: 05/99 AUXILIARY MOUNTING BRACKET AND GASKET
Service repair no - 26.50.04
Remove
1.Disconnect battery.
2.Drain cooling system
See Adjustment, Drain
and refill cooling system
.
3.Remove radiator top hose.
4.Remove intercooler top hose.
5.Remove viscous fan unit.
See Viscous
coupling and fan
6.Remove fan cowl.See Fan cowl
7.Slacken power steering pump pulley retaining
bolts.
8.Remove drive belt.
See ELECTRICAL, Repair,
Auxiliary Drive belt
9.Unscrew 3 bolts and remove power steering
pump pulley.
10.Remove 4 bolts securing power steering pump
mounting bracket.
11.Lower pump and bracket. Do not disconnect fluid
pipes.
12.Remove generator.
See ELECTRICAL, Repair,
Generator
13.Unscrew retaining nut and remove drive belt
tensioner.
14.Release hose clip from bracket above water
pump.15.Disconnect bottom hose/heater return hose at
water pump and heater rail.
16.Disconnect by-pass hose from water pump and
thermostat housing.
17.Remove 5 bolts (one with nut) and single
retaining nut, securing auxiliary mounting
bracket to cylinder block.
18.Withdraw mounting bracket, complete with water
pump.
19.Remove gasket and clean mating faces.
Refit
20.Using 2 slave studs, fit new gasket.
NOTE: All fixing bolts and nuts should be
tightened to
25 Nm (18 lbf/ft)unless
otherwise stated.
21.Locate mounting bracket, complete with water
pump on slave studs and secure with 4 other
fixings.
22.Remove slave studs and fit remaining bolts/nuts.
23.Fit by-pass hose to thermostat housing and
water pump.
24.Fit bottom hose/heater return hose to water
pump and heater rail.
25.Fit heater hose clip to mounting bracket.
26.Fit drive belt tensioner. Tighten nut to
45 Nm (33
lbf/ft).
27.Fit generator.See ELECTRICAL, Repair,
Generator
Do not fit drive belt at this stage.

COOLING SYSTEM
5
REPAIR 28.Secure steering pump and bracket to auxiliary
mounting bracket.
29.Fit steering pump pulley.
30.Fit drive belt
See ELECTRICAL, Repair,
Auxiliary drive belt
.
31.Fit fan cowl
See Fan cowl.
32.Fit viscous fan unit
See Viscous coupling and
fan
.
33.Fit intercooler top hose.
34.Fit radiator top hose.
35.Refill cooling system.
See Adjustment, Drain
and refill cooling system
36.Reconnect battery.THERMOSTAT
Service repair no - 26.45.01
Remove
1.Partially drain cooling system, until coolant level
is below thermostat housing.
2.Disconnect top hose from outlet elbow.
3.Disconnect electrical connections to water
temperature switch.
4.Unscrew 2 bolts and remove outlet elbow.
5.Withdraw thermostat. Note 88°C rating of
thermostat.
6.Place thermostat in a container half full of water.
Heat water and observe temperature at which
thermostat begins to open. Thermostat is
satisfactory if it opens between 85°-89°C.
Refit
7.Fit thermostat with jiggle pin/vent hole upwards.
8.Secure outlet elbow to thermostat housing.
Tighten bolts to
25 Nm (18 lbf/ft).
9.Fit water temperature switch connections.
10.Fit top hose to outlet elbow.
11.Refill cooling system.
See Adjustment, Drain
and refill cooling system

26COOLING SYSTEM
6
REPAIR RADIATOR
Service repair no - 26.40.01
Remove
1.Disconnect radiator bottom hose and drain
cooling system.
See Adjustment, Drain and
refill cooling system
2.Disconnect radiator top hose.
3.Remove viscous fan unit.
See Viscous
coupling and fan
4.Remove fan cowl.See Fan cowl
5.Disconnect oil cooler pipes. Plug all connections
to prevent oil spillage and ingress of dirt.
6.Disconnect top and bottom intercooler hoses.
7.Disconnect bleed hose at radiator.
8.Remove 2 bolts from both sides securing
radiator mounting brackets to bonnet platform.
9.Lift and remove radiator/intercooler assembly
from vehicle.
10.Remove 2 bolts from both sides and detach
radiator top cover from side covers.
11.Lift and remove radiator from intercooler and RH
side frame.
12.Check condition of locating grommets in radiator
top cover and lower mounting bushes. Renew if
necessary.Refit
13.Position radiator between intercooler and RH
side frame.
14.Fit radiator top cover to side covers.
15.Lower radiator/intercooler assembly into
position.
16.Secure radiator mounting brackets to bonnet
platform.
17.Fit radiator bleed hose.
18.Fit top and bottom intercooler hoses.
19.Fit oil cooler pipes.
20.Fit fan cowl
See Fan cowl.
21.Fit viscous fan unit.
See Viscous coupling
and fan
22.Fit radiator top hose.
23.Fit radiator bottom hose and refill cooling
system.
See Adjustment, Drain and refill
cooling system

37MANUAL GEARBOX
2
REPAIR
10.Remove 3 trim studs and lift up handbrake
gaiter.
11.Remove split pin, clevis pin, washer and
disconnect cable from handbrake lever. Ensure
handbrake is off.
12.Drain cooling system
See COOLING SYSTEM,
Adjustment, Drain and refill cooling system
.
13.Remove viscous fan unit
See COOLING
SYSTEM, Repair, Viscous coupling and fan
.
14.Slacken retaining clip and disconnect radiator
top hose at thermostat housing.
15.Slacken retaining clip and disconnect intake
hose at induction manifold. If EGR system is
fitted, slacken 2 retaining clips and disconnect
intake hose at intercooler.
16.Slacken retaining clip and disconnect hose at
turbocharger.
17.Remove bolt securing transmission breather
pipe clip to rear of engine.
18.Release breather pipes.
19.Release ties securing gearbox harness to
breather pipes.
20.Raise vehicle on ramp.
21.Position a suitable container under transmission
and drain main gearbox and transfer box
See
MAINTENANCE , Under vehicle maintenance
.
22.Mark front propeller shaft drive flange and
transfer box output flange for reassembly.
23.Remove 4 nuts and disconnect propeller shaft
from transfer box.

37MANUAL GEARBOX
6
REPAIRREV: 05/99 78.Position crossmember and locate over fixing
studs of LH and RH gearbox mounting rubbers.
79.Align crossmember and secure to chassis with 4
nuts and bolts on each side.
NOTE: Fit battery earth strap retaining clip
to LH top bolt.
80.Fit intermediate silencer.
See MANIFOLD AND
EXHAUST SYSTEM, Repair, Intermediate
pipe - 90
orSee MANIFOLD AND EXHAUST
SYSTEM, Repair, Intermediate pipe - 110/130
.
81.Fit front pipe to exhaust manifold
See
MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust front pipe
.
82.Fit rear propeller shaft to transmission brake
drum. Tighten nuts to
47 Nm (33 lbf/ft).
83.Remove 3 bolts securing support cradle to
transmission and remove hoist.
84.Reconnect battery earth strap to transfer box
fixing.
85.Connect speedometer cable to transfer box and
secure with retaining clip.
86.Coat both sides of clutch slave clinder backing
plate with Hylomar P232M waterproof sealant.
87.Locate backing plate on slave cylinder.
88.Fit slave cylinder to bell housing, engaging
push-rod through centre of dust cover, and with
bleed screw uppermost. Tighten bolts to
25 Nm
(18 lbf/ft).
89.Fit front propeller shaft to transfer box. Tighten
nuts to
47 Nm (33 lbf/ft).
90.Refill main gearbox and transfer boxSee
MAINTENANCE , Under vehicle maintenance
.
91.Feed transmission brake cable through heel
board and ensure grommet is correctly located.
NOTE: Apply a soap solution to aid fitment
of cable.
92.Lower vehicle on ramp.
93.Fit ties to secure gearbox harness to
transmission breather pipes.
94.Fit breather pipe retaining clip to rear of engine.
95.Reconnect charge air hose at turbocharger.
96.Reconnect intake hose at induction manifold. If
EGR system is fitted, reconnect intake hose at
intercooler.
97.Reconnect radiator top hose at thermostat
housing.
98.Fit viscous fan unit
See COOLING SYSTEM,
Repair, Viscous coupling and fan
.
99.Reconnect battery.100.Refill cooling system
See COOLING SYSTEM,
Adjustment, Drain and refill cooling system
.
101.Connect cable clevis to handbrake lever and fit
handbrake gaiter.
102.Locate insulation pad over gear levers and fit to
tunnel cover.
103.Fit gear lever with gaiter to lower lever spline
and secure with retaining nut.
104.Fit gear lever cover.
105.Fit gear lever and transfer box lever knobs.
106.Fit gearbox cover carpet.
107.Check operation of handbrake and adjust as
necessary
See MAINTENANCE , Under
vehicle maintenance
.

HEATING AND VENTILATION
1
REPAIR HEATER UNIT
Service repair no - 80.20.01
Remove
1.Remove bonnet and disconnect battery.
2.Remove radiator bottom hose at radiator union
and drain cooling system
See COOLING
SYSTEM, Repair, Drain and refill cooling
system
.
3.Slacken clips and remove heater hoses at
heater box unions.
4.Remove outer cable securing clips.
5.Slacken trunnions and remove control cables
from heater vent flap levers.
6.Remove heater wiring harness securing loop.
7.Disconnect harness multi-plug.
8.Remove interior bulkhead trim.
9.Remove lower nuts and bolts securing the
heater unit to the bulkhead.
10.Slacken heater unit upper retaining bolts.
11.Manoeuvre heater unit, complete with blower
motor, clear of air inlet duct and remove from
engine compartment.
12.If existing heater unit is to be refitted, remove
sealing rubber.
For heater matrix removal
See Heater matrix.
For blower motor removal
See Blower motor.
Refit
13.Smear a new heater unit sealing rubber with a
suitable impact adhesive and fit to heater.
14.Manoevre heater unit into position in engine
compartment, fit blower motor to air inlet duct
and locate upper fixing bolts.
15.Loosely fit heater unit lower fixing bolts.
16.Fully tighten upper fixing bolts.
17.Fully tighten lower fixings and refit interior
bulkhead trim.
18.Secure wiring harness and reconnect multi-plug.
19.Fit control cables to vent flap trunnions and
secure with outer cable clips.
20.Connect heater hoses.
21.Fit radiator bottom hose and refill cooling system
See COOLING SYSTEM, Repair, Drain and
refill cooling system
.
22.Fit bonnet and reconnect battery.

AIR CONDITIONING
1
DESCRIPTION AND OPERATION AIR CONDITIONING SYSTEM
Description
Air conditioning is an optional system which provides
fully integrated climate control for the vehicle interior.
The air conditioning system comprises four major
units as follows:- An evaporator matrix and expansion
valve (1), housed in the heater/ cooler unit (3), an
engine mounted compressor (4), a condenser (5),mounted in front of the radiator, and a receiver/drier
(7) located to the right of the condenser.
Ancillary components in the system comprise a blower
motor (2), also housed in the heater/cooler unit, and
condenser cooling fan motors (6), mounted on a
support frame. The four major units are interconnectd
by preformed metal and flexible refrigerant pipes as
illustrated below (RH drive installation shown).
Coolant flow to a heater matrix, housed in the heater
cooler unit, is controlled by a water valve (8) from a
combined air conditioning panel on the vehicle fascia.
1.Evaporator matrix and expansion valve
2.Blower motor
3.Heater/cooler unit
4.Compressor
5.Condenser6.Condenser fan motors
7.Receiver/drier
8.Water valve
9.Heater matrix feed and return hoses