2002 LAND ROVER DISCOVERY earth

ENGINE - V8
12-2-28 REPAIRS
21.Disconnect multiplug from EVAP purge valve.
22.Remove nut securing engine harness earth to
body and disconnect engine harness to main
harness multiplug.
23.Remove trim fixings securing toe board and
remove toe board. 24.Disconnect 5 multiplugs connecting engine
harness to ECM.
25.Release engine harness, pull into engine bay
and coil on top of engine.
26.Raise vehicle on ramp.
27.Remove 3 bolts securing oil cooling pipes to
sump and remove saddle clamps.
28.Tie oil cooling pipes aside.
29.Remove exhaust front pipe.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Front pipe.

ENGINE - V8
12-2-30 REPAIRS
Refit
1.Clean mating faces of engine and gearbox,
dowel and dowel holes.
2.Lubricate splines and bearing surface on first
motion shaft with grease.
3.With assistance position engine in engine bay,
align to gearbox and locate on dowels.
4.Position support brackets, fit bell housing bolts
and tighten to 50 Nm (37 lbf.ft).
5.Position engine mountings, fit nuts and tighten
to 85 Nm (63 lbf.ft).
6.Lower lifting equipment and remove from
engine.
7. Models with automatic gearbox: Align torque
converter to drive plate, fit bolts and tighten to
50 Nm (37 lbf.ft). Fit access plug.
8.Fit exhaust front pipe.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Front pipe.
9.Position oil cooling pipe saddle clamps and
tighten bolts.
10.Position engine harness into foot well.
11.Connect 5 multiplugs to ECM.
12.Fit toe board and secure with trim fixings.
13.Connect engine harness earth to body and
secure with nut.
14.Connect engine harness to main harness
multiplug.
15.Connect multiplug to EVAP purge valve.
16.Connect engine harness multiplugs to fuse
box.
17.Connect starter lead to fuse box and secure
with nut.
18.Connect engine harness positive lead to
battery and tighten nut.
19.Fit fuse box cover.
20.Position engine earth lead and secure with
bolt.
21.Position coolant rail and secure with bolt.
22.Connect harness clips to coolant rail.
23.Connect hose to coolant rail and coolant pump
and secure with clips.
24.Connect PAS pump high and low pressure
pipes and secure with clips.
25.Position oil cooling pipe saddle clamp to PAS
pump housing and secure with bolt.
26.Clean A/C compressor and housing mating
faces, dowels and dowel holes. 27.Position A/C compressor, fit bolts and tighten
to 22 Nm (16 lbf.ft).
28.Connect multiplug to A/C compressor.
29.Clean ACE pump and housing mating faces,
dowels and dowel holes.
30.Position ACE pump, fit bolts and tighten to 22
Nm (16 lbf.ft).
31.Clean all pulley 'V's, fit auxiliary drive belt,
using a 15mm spanner, release belt tensioner
secure belt and re-tension drive belt .
32.Ensure auxiliary drive belt is correctly located
on all pulleys.
33.Fit radiator.

+ COOLING SYSTEM - V8, REPAIRS,
Radiator.
34.Fit top hose and secure with clips.
35.Connect fuel pipe to fuel rail.
36.Position ignition coils and connect ht leads.
37.Fit upper inlet manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
38.Fit new oil filter and refill engine with oil.

+ ENGINE - V8, REPAIRS, Filter - oil.

+ MAINTENANCE, PROCEDURES,
Engine oil - V8 engine.
39.Top up gearbox oil.

+ MAINTENANCE, PROCEDURES,
Automatic gearbox.

ENGINE - V8
12-2-36 REPAIRS
8.Clean coolant pump and mating face.
9.Use a new gasket and fit coolant pump.
Tighten bolts securing coolant pump to 25 Nm
(19 lbf.ft).
10.Ensure CMP sensor is clean and fit sensor to
cover.
11.Fit clamp to CMP sensor and tighten bolt to 8
Nm (6 lbf.ft).
12.Fit timing gear cover gasket.

+ ENGINE - V8, REPAIRS, Gasket -
timing gear cover.
Gasket - sump
$% 12.60.38
Remove
1.Release fixings and remove battery cover.
2.Disconnect battery earth lead.
3.Remove dipstick.
4.Raise the vehicle on a ramp.
5.Drain engine oil.

+ MAINTENANCE, PROCEDURES,
Engine oil - V8 engine.
6.Remove 8 bolts securing cross member and
remove cross member.
7.Raise front of vehicle under body to increase
clearance between engine and front axle.
8.Disconnect and release gearbox oil cooler pipe
and discard 'O' ring.

ENGINE - V8
12-2-38 REPAIRS
8.Clean gearbox oil cooler pipe 'O' ring recess
and mating face.
9.Lubricate and fit new 'O' ring to gearbox oil
cooler pipe.
10.Position pipe and tighten nut.
11.Lower front of vehicle.
12.Position cross member to chassis, fit bolts and
tighten to 25 Nm (18 lbf.ft).
13.Refill engine oil and fit dipstick.
14.Connect battery earth lead.
15.Fit battery cover and retain with fixings.
Switch - oil pressure
$% 12.60.50
Remove
1.Release fixings and remove battery cover.
2.Disconnect battery earth lead.
3.Raise front of vehicle.
WARNING: Do not work on or under a
vehicle supported only by a jack. Always
support the vehicle on safety stands.
4.Remove fixings and remove underbelly panel.
5.Disconnect multiplug from oil pressure switch.
6.Position container below switch to catch oil
spillage.
7.Remove oil pressure switch and discard
sealing washer.
Refit
1.Clean oil pressure switch threads.
2.Fit new sealing washer to switch.
3.Fit oil pressure switch and tighten to 15 Nm (11
lbf.ft) .
4.Connect multiplug to oil pressure switch.
5.Fit underbelly panel and secure with fixings.
6.Remove stand(s) and lower vehicle.
7.Connect battery earth lead.
8.Fit battery cover and retain with fixings.
9.Top up engine oil.

EMISSION CONTROL - TD5
17-1-14 REPAIRS
Valve - EGR - Pre EU3 models
$% 17.45.01
On all vehicles up to VIN number 1A736339, the
EGR pipe assembly must be replaced every time the
system is disturbed.
Remove
1.Release turnbuckles and remove battery cover.
2.Disconnect battery earth lead.
3.Remove 3 bolts and remove engine acoustic
cover.
4.Remove cooling fan coupling.

+ COOLING SYSTEM - Td5, REPAIRS,
Fan - viscous.
5.Disconnect vacuum hose(s) from EGR valve.
6.Loosen clip and release air intake from EGR
valve.
7.Remove 4 bolts, release EGR valve from inlet
manifold and discard gasket.
8.Remove 2 bolts and release EGR valve clip
from cylinder head.
9.Remove and discard 2 bolts securing EGR
valve pipe to exhaust manifold. 10.Remove EGR valve assembly.
11.Remove clip and remove pipe from EGR valve.
Refit
1.Clean EGR valve and mating face on pipe.
2.Position pipe to EGR valve and fit retaining clip.
Fit bolt but do not tighten at this stage.
3.Position EGR valve assembly, locate pipe
flange to exhaust manifold, fit new bolts but do
not tighten at this stage.
4.Clean inlet manifold and EGR valve mating
faces.
5.Using new gasket, position EGR valve to inlet
manifold fit bolts and tighten to 10 Nm (7 lbf.ft).
6.Align EGR pipe clip to cylinder head, fit bolts
but do not tighten at this stage.
7.Tighten EGR pipe bolts to correct torque in
following sequence:
lEGR pipe retaining clip bolt 6 Nm (4.5 lbf.ft)
lEGR pipe clip to cylinder head bolts 10 Nm
(7 lbf.ft)
lEGR pipe flange to exhaust manifold bolts
10 Nm (7 lbf.ft)
8.Position air intake hose and tighten clip.
9.Connect vacuum hoses to EGR valve.
10.Fit cooling fan coupling.

+ COOLING SYSTEM - Td5, REPAIRS,
Fan - viscous.
11.Connect battery earth lead.
12.Fit battery cover and secure the fixings.

EMISSION CONTROL - TD5
REPAIRS 17-1-15
Valve - EGR - EU3 models
$% 17.45.01
Remove
1.Release turnbuckles and remove battery cover.
2.Disconnect battery earth lead.
3.Remove 3 bolts and remove engine acoustic
cover.
4.Remove cooling fan coupling.

+ COOLING SYSTEM - Td5, REPAIRS,
Fan - viscous.
5.Disconnect vacuum hose(s) from EGR valve.
6.Loosen clip screw and disconnect air intake
hose from EGR valve.
7.Remove screw and remove clamp securing
EGR pipe to EGR valve.
8.Remove 4 bolts securing EGR valve, remove
valve and discard gasket.
9.Discard EGR pipe gasket.Refit
1.Clean EGR valve and mating faces.
2.Fit new gasket to EGR pipe.
3.Using new gasket, position EGR valve to inlet
manifold fit bolts and tighten to 10 Nm (7 lbf.ft).
4.Fit EGR pipe clamp and tighten screw to 6 Nm
(4.4 lbf.ft).
5.Connect air intake hose to EGR valve and
tighten clip.
6.Connect vacuum hoses to EGR valve.
7.Fit cooling fan coupling.
+ COOLING SYSTEM - Td5, REPAIRS,
Fan - viscous.
8.Fit engine acoustic cover and tighten bolts to
10 Nm (7 lbf.ft).
9.Connect battery earth lead.
10.Fit battery cover and secure the fixings.

EMISSION CONTROL - V8
17-2-20 DESCRIPTION AND OPERATION
Purge valve operation is controlled by the engine control module (ECM). The purge valve has a two-pin electrical
connector which links to the ECM via the engine harness. Pin-1 of the connector is the power supply source from fuse
2 in the engine compartment fusebox, and pin-2 of the connector is the switched earth from the ECM (pulse width
modulated (PWM) signal) which is used to control the purge valve operation time. Note that the harness connector
for the purge valve is black, and must not be confused with the connector for the Secondary Air Injection
vacuum solenoid valve which is grey.
When the purge valve is earthed by the ECM, the valve opens to allow hydrocarbons stored in the EVAP canister to
be purged to the engine inlet manifold for combustion.
If the purge valve breaks or becomes stuck in the open or closed position, the EVAP system will cease to function
and there are no default measures available. The ECM will store the fault in memory and illuminate the MIL warning
lamp if the correct monitoring conditions have been achieved (i.e. valve status unchanged for 45 seconds after engine
has been running for 15 minutes). If the purge valve is stuck in the open position, a rich air:fuel mixture is likely to
result at the intake manifold, this could cause the engine to misfire and the fuelling adaptions will change.
The following failure modes are possible:
lSticking valve
lValve blocked
lConnector or harness wiring fault (open or short circuit)
lValve stuck open
If the purge valve malfunctions, the following fault codes may be stored in the ECM diagnostic memory, which can be
retrieved using 'Testbook':
P-code Description
P0440Purge valve not sealing
P0444Purge valve open circuit
P0445Purge valve short circuit to ground
P0443Purge valve short circuit to battery voltage

EMISSION CONTROL - V8
DESCRIPTION AND OPERATION 17-2-23
For systems utilising the vacuum method for determining evaporation leaks, the sensor is used to monitor for a drop
in vacuum pressure. The evaporation system is sealed by the CVS valve and purge valve after a vacuum has been
previously set up from the intake manifold while the purge valve is open and the CVS valve is closed. If any holes or
leaks are present at the evaporation system joints, the vacuum pressure will gradually drop and this change in
pressure will be detected by the fuel tank pressure sensor. This system is capable of determining leaks down to 1 mm
(0.04 in.) in diameter.
The fuel tank pressure sensor is part of the NAS OBD system, a component failure will not be noticed by the driver,
but if the ECM detects a fault, it will be stored in the diagnostic memory and the MIL light will be illuminated on the
instrument pack. Possible failures are listed below:
lDamaged or blocked sensor
lHarness / connector faulty
lSensor earthing problem
lOpen circuit
lShort circuit to battery voltage
lShort circuit to ground
lECM fault
Possible failure symptoms of the fuel tank pressure sensor are listed below:
lFuel tank pressure sensor poor performance
lFuel tank pressure sensor low range fault
lFuel tank pressure sensor high range fault
If the fuel tank pressure sensor should malfunction, the following fault codes may be stored in the ECM diagnostic
memory, which can be retrieved using 'Testbook':
P-code Description
P0451Fuel tank pressure signal stuck high within range
P0452Fuel tank pressure signal short circuit to battery voltage (out of range - High)
P0453Fuel tank pressure signal short circuit to ground or open circuit (out of range - Low)