1998 JAGUAR X308 battery

Engine Cooling - Cooling Fan Motor and Shroud
Re
moval and Installation
Remov

al
Installation


1.
Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
2. Open the engine compartment and fit paintwork protection
sheets.

3. Disc
onnect the harness multip
lug from each cooling fan.
Cut an
d remove the ratchet st
rap which secures each fan
harness to the fan moto r lower support leg.
1. Disconnect the mult iplug from each fan.
Di
sconnect each harness
from the clip on the fan
mounting frame and repo sition the harness.

4. R
emove the two bolts which
secure the fan and motor
assembly to the radiator.
5. Carefully remove the fan and mo tor assembly from the vehicle.

6. Re
move the mounting grommets
and spacer tubes from the
assembly.
1. Installation is the reverse of the remova l procedure. Ensure
that the fan and motor assembly locate into the lower
mountings.
2. Connect the battery and fit the battery cover. Reset the clock
and the radio.

Engine Cooling - Radiator4.0L NA V8 - AJ27/3.2L NA V8 - AJ26
Re
moval and Installation
Remov

al
1.
O
pen the engine compartment and fit paintwork protection
sheets.

2. Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
3. Drain the coolant from the radiator.
4. Depressurise the climate control system. Refer to Section 412-
03 Observe all safety warnings and precautions stated in that
section.
5. Release both gas struts, set the engine compartment cover
fully forward to the service acce ss position and support with a
wooden (or similar) strut - take care not to damage the engine
compartment cover or the radiator grille.
6. Remove the twin fan and motor assembly. Refer to Operation
26.25.12 in this section.

7. D
isconnect the radiator breather hose.
R

elease the Quick-Fit hose (radiator to expansion tank)
and disconnect the hose from the radiator.

8. Di
sconnect the transmission oil cooler lower pipe.
1. Disconnect and reposition the union nut, lower cooler pipe to radiator. Di sconnect the pipe.
2. Remove and discard the O- ring seal from the pipe
and fit blanking plugs to the pipe and to the union on
the radiator.
9. From above the vehicle, disconne ct the transmission oil cooler
upper pipe.

16
.
Refill the cooling system. Refer to the Refill procedure in
General Procedures.
17. Repressurise the climate cont rol system. Refer to Section
412-03 Observe all safety warnin gs and precautions stated in
that section.
18. Close the engine compartment cover.
19. Connect the battery and fit the battery cover. Reset the clock
and the radio.

Engine Cooling - Radiator4.0L SC V8 - AJ26
Remo
val and Installation
Remov
a
l
1.
Op
en the engine compartment and fit paintwork protection
sheets.

2. Disc
onnect the batt
ery ground cable.
Re
move the battery cover.
3. Drain the coolant from the radiator.
4. Depressurise the climate control system. Refer to Section 412-
03 Observe all safety warnings and precautions stated in that
section.
5. Release both gas struts, set the engine compartment cover
fully forward to the service acce ss position and support with a
wooden (or similar) strut - take care not to damage the engine
compartment cover or the radiator grille.
6. Remove the twin fan and motor assembly. Refer to Operation
26.25.12 in this section.

7. Di
sconnect the radiator breather hose.
R
e
lease the Quick-Fit hose (radiator to expansion tank)
and disconnect the hose from the radiator.

8. Disc
onnect the transmission oil cooler lower pipe.
1. Disconnect and reposition the union nut, lower cooler pipe to radiator. Di sconnect the pipe.
2. Remove and discard the O- ring seal from the pipe
and fit blanking plugs to the pipe and to the union on
the radiator.
9. From above the vehicle, disconne ct the transmission oil cooler
upper pipe.

16
. Re
fill the cooling system. Refer to the Refill procedure in
General Procedures.
17. Repressurise the climate cont rol system. Refer to Section
412-03 Observe all safety warnin gs and precautions stated in
that section.
18. Close the engine compartment cover.
19. Connect the battery and fit the battery cover. Reset the clock
and the radio.

Supercharger Cooling - Water Pump
Re
moval and Installation
Remov

al
1.
O
pen the engine compartment and fit paintwork protection
sheets.

2. Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
3. Remove the twin fan and motor assembly. Refer to Operation
26.25.12.

4. Disc
onnect the harness electrical connector.
R

elease the harness connector from the mounting bracket.

Disc
onnect the harness connector.

5. R
emove the two nuts which secure the pump to the flexible
mountings.
6. Reposition the pump to fit hose clamps.
Fi
t a hose clamp to the inlet pipe and one to the outlet
pipe.

In
stallation



7.
Disc
onnect the pipes from the
pump and remove the pump.
1. Release and reposition th e hose clip along the inlet
hose and discon nect the hose.
2. Release and reposition the hose clip along the outlet
hose and disconnect th e pump from the hose.
3. Fit blanking plugs to the pipes and to the pump.
Remove t
he pump and mounting bracket assembly from
the vehicle.

8. Remove the moun
ting bracket and clamp from the pump.
1. Remove the nuts which secure the clamp.
2. Remove the clamp.
9. Clean the adjacent area of any water spillage.
1. Fitting is the reverse of the removal procedure.
2. Fit the twin fan and motor assembly. Refer to Operation
26.25.12.
3. Connect the battery and fit the battery cover. Refer to the
Battery Reconnection Procedure 86.15.15.
4. Switch on the ignition and allow the pump to operate for one
minute to circulate coolant.
Swit ch
off the ignition.
Top up th
e coolant
. If ne
cessary, refer to Operation
26.10.01 Coolant Refill Procedure.

CAUTI
ON: When probing connectors to take
measurements in the course of the pinpoint tests, use the adaptor kit,
part number 3548-1358-00.
• NOTE: When performing electrical voltag e or resistance tests, always use a digital multimeter (DMM) accurate to 3
decimal places, and with an up-t o-date calibration certificate. When testing resistance, always take the resistance of the
DMM leads into account.
• NOTE: Check and rectify basic faults before beginning diagnostic ro utines involving pinpoint tests.
Sy
mptom Chart
Sy

mptom
Possib
le source
Acti
on
Engine

cranks, but does not fire
Secu
rity system /Immobiliser
engaged
Thr
ottle contaminated
Harness damage


F

uel pump relay
Fue

l system
R

efer to service action S491

Contact dealer techn
ical
support for information
on security system. Chec k bulletins for throttle
cleaning procedure. For fuel pump relay circuit
tests, GO to Pinpoint Test E.
.
Check fuel pressure,


REFER to Section 310
-00
Fuel System
- Gen
eral
Informati

on
.
Chec
k for associated DTCs
. Check service actions.
Engine
cranks and fires, but will
not start
F
uel pump relay
Thr

ottle contaminated
Purge

valve
Fue

l pump
Engine coolan

t temperature
(ECT) sensor
Spark plugs
fouled
Ignition coil

failure(s)
Check f

or water ingress into
spark plug wells
HT sho
rt to ground (tracking)
check rubber boots for cracks/damage
Cyl
inder compression loss
(short-term. Refer to bulletin;
303-52)
R
efer to service action S491

F
or fuel pump relay tests,
GO to Pinpoint Test E.
.
Check bull
etins for throttle cleaning procedure. For

evaporative emissions tests,
REFER to Section 303
-1
3 Evaporative Emissions
. Chec

k fuel pressure,
REFER to Section 310
-00
Fuel System
- Ge
neral
Informati

on
.
F
or ECT sensor circuit tests,
REFER to Section 303
-14 Elec
tronic Engine
Controls.
For ign
ition system,
REFER to Section 303
-07
Engine Ignition
.
Check bulletins an d service
actions.
D

ifficult to start cold
Roc
hester valve
Batt

ery
Thr

ottle contaminated
Fue

l pump
Engine coolan

t temperature
(ECT) sensor
Purge
valve
Cyl

inder compression loss
(short-term. Refer to bulletin;
303-52)
Blocked part-load breather (
service action S474)
R

efer to service action S491

F
or rochester valve tests,
REFER to Section 303
-14 Elec
tronic Engine
Controls.
F
or battery information,
REFER to Section 414
-0
1 Battery, Mounting and
Cables.
Check bull
etins for throttle cleaning procedure.
Check fuel pressure,
REFER to Section 310
-00
Fuel System
- Ge
neral
Informati

on
.
F
or ECT sensor circuit tests,
REFER to Section 303
-14 Elec
tronic Engine
Controls.
For evaporat
ive emissions tests,
REFER to Section 303
-1
3 Evaporative Emissions
. Check bulletins an

d
service actions.
D
ifficult to start hot
Roc
hester valve
Purge

valve
Thr

ottle contaminated
Fue

l pump
Engine coolan

t temperature
(ECT) sensor
Blocked part-load breather (
service action S474)
Injec

tor leak
F
or Rochester
valve test,
REFER to Section 303
-14 Elec
tronic Engine
Controls.
Fo
r injector leak test, REFER to technical service
bulletin, 303-39. Check fuel pressure, For evaporative emissions components,
REFER to Section 303
-1
3 Evaporative Emissions
. F

or ECT sensor tests,
REFER to Section 303
-14 Elec
tronic Engine
Controls. D

ifficult to start after hot soak
(vehicle standing after engine has
reached operating temperature)
Roc
hester valve
Thr

ottle contaminated
Purge

valve
Fue

l pump
Engine coolan

t temperature