1998 JAGUAR X308 valve

WARNING: B
EFORE PROCEEDING, IT IS ESSENTIAL THAT
THE WARNING NOTES GIVEN IN SECTION 100-00 (UNDER
THE HEADING 'SAFETY PRECAUTION S') ARE READ AND UNDERSTOOD.
3.
Connect the vacuum hose to the purge valve.

30

.
Connect the fuel feed and return hoses.
R
emove the blanking plugs
from the mating pipes.
1. Connect the hoses at the Quick Fit connectors.
F
it the return hose into the feed hose clip.

31
.
Connect the starter motor power cable.
1. Reposition and connect the power cable to the power stud. Fit the securing nut to the stud.
2. Reposition the protective boot over the starter motor power stud.
3. Connect the harness connector, engine management harness to starter motor. Fit the connector to the
mounting bracket.
R
enew the tie strap which secures the power cable to the
right hand enclosure.

32
.
Connect the generator suppressi on module (where fitted)
harness.
Re
position the harn
ess under the suppression module and
connect the harness connector.
33. Connect the hoses to the power steering pump.

T
he cooling system for the supercharged engine is very similar
to the normally aspirated engine, but with the addition of a
water cooled, intake air charge cooling system. This comprises a radiator, an electrically operated water pump and two
charge air cooler assemblies (heat exchangers) - one for each bank. The system works independently, but is connected to the
main cooling system at the bottom hose to allow for therma l expansion and to help to prevent unwanted circulation.
The condenser for the air conditioning system fits between th e coolant main radiator and the charge air cooling system
radiator.
Cylinder Block Heater, Drain Location
ItemDe
scription
1Rad

iator - Intake Air Coolant
2Ele

ctrically Operated Coolant Pump
3Top Hose
4Charge Air Coo

lers -
Intake Air Cooling
5Fi
lling Point for Intake Air Cooling
6N

on-Return Valves - Heater
7Ele

ctrically Operated Coolant Pump
8Hea

ter Matrix
9Wate

r Valve - Heater Control
10EGR V

alve (when fitted)
11Thr

ottle Body
12Coolan

t Recovery Bottle
13H

eader/Expansion Tank
14Eng

ine Coolant Pump
15The

rmostat Housing
16Bottom

Hose
17Air Bleed

Pipes
18Rad

iator - Main Cooling System

Whe r
e considered necessary, some hose conn
ections have an indication mark to ensure correct orientation of the hose when
being fitted.
All joints use spring-band clips, except small pipes on the bleed system joints - which use cobra clips. The heater feed and
return hoses use quick-connection unions.
Supply and return hoses for the heater are located between the cylinder banks.
A connection on the rear of the A-bank provides coolant supply for the electronic throttle and the EGR valve (where fitted).
The outlet from the electronic throttle connects to the return hose from the heater.
Cool
ant Header and Recovery Tanks
A recovery system comp
rising the header tank
and a recovery tank is fitted. The recove ry tank is located in front of the left
hand front wheel arch liner.
The header tank provides the cooling system filling point and carries the coolant level sensor. The pressure cap allows
controlled release of coolant to the re covery tank during normal operation.
The recovery tank accommodates the expansion of the system coolant during normal operation. On engine cool-down, the
coolant contracts and is returned to the main system.
Coo lin
g Fans
The two
rad
iator cooling fans are mounted in
a cowl assembly within the cooling module.
The fans are controlled by the ECM dependent on the demand fr om the cooling system (temperature) or the air conditioning
ItemDescrip
tion
1EGR
E
ngines
2Non
-
EGR Engines
3Hea
ter Connections

11. P
osition the evacuated air hose into a container.

12 . N
OTE: Make sure the coolant su
pply valve is in the closed
position on the vacuum filler gauge assembly.
• NOTE: The coolant vacuum fill t ool needs an air pressure of 6
to 8 bar (87 to 116 psi) to operate correctly.
• NOTE: Small diameter or long airlines may restrict airflow to
the coolant vacuum fill tool. Open the air supply valve.

13 .
NOTE
: Make sure the coolant supply hose is positioned
into a container of fifty perc ent mixture of Jaguar Premium
Cooling System Fluid or eq uivalent, meeting Jaguar
specification WSS M97B44-D an d fifty percent water. Make
sure no air can enter the coolant supply hose.
Open the coolant supply valve for 2 seconds to prime the
coolant supply hose.

14 . Apply air
pressure
progressively until the arrow on the
vacuum filler gauge reac hes the green segment.
15. Close the air supply valve.

Vehic
les with supercharger


16
.
Allow one minute to check the vacuum is held.
Di
sconnect the air supply.

17
.
NOTE: Close the coolant supply valve when the coolant
expansion tank MAX mark is reached or coolant movement has
ceased.
Open the coolant supply valve and allow the coolant to be
drawn into the system.
18. Remove the vacuum filler gaug e and cooling system vacuum
refill adaptor assembly.
19. Install the coolant expansion tank pressure cap.
20. NOTE: To ensure that air is not drawn into the system during
the following operations, do not remove the coolant expansion
tank pressure cap whilst the supe rcharger filler plug is open.
• NOTE: Place a suitable cloth ar ound supercharger fill port.
Top up the superc harger coolant.
1. Remove the filler plug an d discard the sealing washer.
2. Top up the coolant through the supercharger fill port.

I
nstallation



8.
Remove an
d discard the sealing
rings from the outlet pipe
grooves.
1. Installation is th e reverse of the re moval procedure.
Use new
sealing rings on th
e coolant outlet pipe and
thermostat housing.
The t
hermostat ball valve must
locate in the recess in the
cover.
2. Tighten the coolant outlet pipe bolts to 8-12 Nm. If replacing
the coolant temperature sensor, tighten to 15-19 Nm.
3. Refill the cooling system as de scribed in General Procedures.

Engine Cooling - Thermostat4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
Remo
val and Installation
Remov
a
l
Installation
1. Op
en the engine compartment and fit paintwork protection
sheets.
2. Drain the radiator. Refer to Ge neral Procedures. Retain the
coolant drain tray in position to catch any spillage when
removing the thermostat cover.
3. Remove the engine cove r panels for access.

4. Disc
onnect the radiator bott
om hose from the thermostat
cover.
1. Release and reposition th e hose clip, and disconnect
the bottom hose from th e thermostat cover.

5. Re
move the thermostat cover.
1. Remove the three bolts which secure the thermostat cover to the housing.
2. Remove the thermostat cover from the housing.

6. Re
move the thermostat from the housing.
1. Remove the thermostat from the housing.
2. Remove (and discard) th e seal from the thermostat.
Fit a new seal to the thermostat. Th
e seal may be fitted
either way round.
1. Installation is th e reverse of the re moval procedure.
2. Fit the thermostat so that the vent ball valve locates in the
recess in the cover.
3. Tighten the thermostat cover bolts to 8-10 Nm.

Engine Cooling - Thermostat4.0L SC V8 - AJ26
Remo
val and Installation
Remov
a
l
Installation

1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Drain the radiator. Refer to Ge neral Procedures. Retain the
coolant drain tray in position to catch any spillage when
removing the outlet pipe.

3. Disc
onnect the bottom hose
from the coolant outlet pipe.
1. Release and reposi tion the hose clip.
2. Disconnect the bottom hose.

4. Re
move the thermostat from the outlet pipe.
1. Remove the three bolts which secure the thermostat cover to the outlet pipe.
2. Remove the thermostat cover, the thermostat and
the seal from the outlet pipe. Discard the seal.
1. Installation is th e reverse of the re moval procedure.
Use new seali
ng rings on th
e coolant outlet pipe and
thermostat housing.
The t he
rmostat ball valve must
locate in the recess in the
cover.
2. Tighten the thermostat cover bolts to 8-10 Nm.
3. Refill the cooling system as de scribed in General Procedures.