1998 JAGUAR X308 idler

                Removal and  Installation  
                     Fuel Injection  Supply  Manifo ld LH
 
(19.60.05)  
                     Fuel Injection  Supply  Manifold  RH  (19.60.04)  
                     Fuel Injection  Supply  Manifold  Pipe  (19.41.04)  
                     Fuel Injector  Vehicles  Without:  Supercharger  (18.10.01)  
                     Fuel Injector  Vehicles  With: Supercharger  (18.10.01) 
                     Fuel Injectors  Vehicles  With:  Supercharger  (18.10.02) 
                     Throttle Body  (19.70.04)  
                     Throttle Body  Gasket  (19.70.07)  
 
             303‐05:  Accessory  Drive  
                 Descriptio
n and  Operation  
                     Accessory Drive  
                 Removal and  Installation  
                     Accessory Drive  Belt (12.10.40)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt (12.10.40)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Accessory Drive  Belt Idler  Pulley  (12.10.43)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt  Idler  Pulle
y (12.10.43)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Accessory Drive  Belt Tensioner  (12.10.41)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Accessory Drive  Belt Tensioner  (12.10.41)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Supercharger  Belt  (18.50.08)  
                     Supercharger  Belt  Idler  Pulley  (18.50.09)  
                     Supercharger  Belt  Tensioner  (18.50.24)  
 
             303‐06:  Starting  System  
                 Description  and  Operati
on 
                     Starting System  
                 Diagnosis  and  Testing  
                     Starting System  
                 Inspection  and Verification  
                     Diagnostic Trouble  Code  (DTC)  Index  
                     Pinpoint Tests  
                 Removal and  Installation  
                     Starter Motor  (86.60.01)  
 
  

diverter val
ve (if fitted) and oil filter.
Main
bearings
which are grooved in the upper positions and plain in
the lower positions. They are manufactured from
aluminium / tin material.
A c
rankshaft with under
cuts and rolled fillets for extra strength.
Fracture
-split connecting rods in sintered-forged steel.
Brackets
bolted to the front of
the cylinder
block are used to mo unt all accessories.
A sin
gle, seven ribbed vee belt
drives the accessories.
An au
tomatic belt tensioner for the front accessory drive,
incorporating a wear indicator.
An advanced en
gine management system inco
rporating electronic throttle control.
The un
it meets the requirements of the CARB OBDII USA legislation.
Ancillary Systems
The an
ci
llary systems, driven by the engine, each have a
detailed Description and Operation along with Diagnostic
Procedures, and Removal and Installation instructions ; refer to the following sections of this manual:
Power Steeri
ng Pump - Section 211-02
Ai
r Conditioning Compressor - Sectio
n 412-03
Engine
C
ooling Pump - Section 303-03
Generator
- Sectio
n 414-02
The drive belt, idler pulley and automatic tensioner are described in Section 303-05.
The engine starting system is described in Section 303-06.
En
gine Management and Emission Control System
Engine Control Modu
le (ECM)
Engine
management and exhaust emissions are controlled by the ECM, which has the
following main functions:
Fu
el injection
Idle
s
peed
Ignition Ev

aporative loss system
Engine
cooling fans Clim
ate control compressor clutch demand
The microprocessor within the ECM receiv es signals from various sensors and other modules and uses a pre-determined
program to compute engine management functions.
Adaptive functions are incorporated in the ECM to cater for co ntinuous adjustments to its computations to suit prevailing
conditions. Because the system also controls emissions to suit all modes, neither CO levels nor idle speed require service
attention or adjustment, except if an error should occur.
On Board Diagnostics are controlled by the ECM with the continuous monitoring of incoming signals and the subsequent
verification against what the module expects to 'see'. Should a si gnal be incorrect or missing, the ECM will substitute a fixed
value to provide the 'limp home mode' and alert the driver of the problem. Fixed values may be adopted for:
Transmission oil
temperature
Mechanica
l
guar
d position
Throttle blade angle Camshaft position

Inta
k
e air temperature
Diagnostic trouble codes (DTC), including OBD II codes, are stored in the ECM memo ry and can be read by an appropriate
retrieval tool.
Should either the ECM or TCM fa il, ensure that the control housing cooling fan is operating correctly. Failure of the cooling
fan MUST be rectified before renewing a control module and details of a fa n failure should accompany a returned control
module.

Engi
ne -
Torqu
e Specifications


De
s
cription
Nmlb
-
ft
lb
-
in
A
ccessory
drive belt tensioner
43--
A
ccessory
drive belt idler pulley
61--
Air in
ta
ke tube to throttle body
5--
A/C
pipes t
o receiver / drier
9--
A/C pipe m

anifold joints
9--
Camsh

aft bearin
g caps10--
Ca
msh
aft cove
r10--
Ch
arge Air Co
oler Adaptor to cylinder head (SC)
21--
Co
olan
t outlet pipe (AJ26 NA)
10--
Cran
kshaft damper bolt - no lockin
g ring
St
ag
e 1
80--
Stag

e 2
80°--
C
r
ankshaft damper bolt - with locking ring
37
5--
Cra
nkshaft position sensor
10--
Cy
li
nder head bolts M10
35--
Cy
lin
der head bolts M8 (two at front of head)
25--
Driv
es
haft (propshaft) drive flan
ge bo
l
ts
82--
ERG p
i
pe to exhaust manifold
21--
Engi

ne compartment cover (bonnet) hinges
25--
En
gine
coolant radiator top securing panel
25--
E
ng
ine front mounting
70--
En
gine
oil cooler pipes (clamp)
21--
En
gi
ne / Transmission assembly rear mounting centre bolt
35--
En
gi
ne / Transmission assembly rear mounting outer bolts
25--
Ex
ha
ust downpipe support bracket to flywheel housing
50--
Ex
ha
ust downpipe to lower mounting bracket
48--
E
x
haust camshaft sprocket
St
age 120--
Stage 290 °--
Ex
haust manifold to cylinder head
18--
Ex
ha
ust manifold flange to downpipe
18--
E
x
haust Torca clamps
55--
Fuel cross-over elbo

w
10--
Fu
el f
eed pipe to intake manifold
10--
Fuel
Injector (AJ
26)
5--
Fuel
injector ha
rness clips to camshaft cover (SC)
5--
Fu
el p
ressure re
gu
l
ator to intake manifold
10--
F
u
el rail to Char
ge
A
ir Cooler Adaptor (SC)
21--
In
ta
ke manifold to cylinder heads
21--
Inta

ke elbow support brackets
18--
Oil f
i
lter
17--
Oil C
o
oler
7--
P
AS pu
mp hose unions
25--
P
r
imary timing chain fixed guide
12--
P
r
imary timing chain tensioner
12--
Pr

imary timing chain tensioner blade
14--
S
e
condary timing chain tensioner to cylinder
12--
S
t
eerin
g ra
ck45--
Thro
ttle body to intake elbow
21--
Th
ro
ttle cable abutment to throttle body
5--
Th
ro
ttle intake elbow to intake manifold
21--
Ti
mi
ng cover
12--
Variable camshaft t
i
ming oil control unit to intake camshaft
St
ag
e 1
20--
St
ag
e 2
90
°--
Var
iable camshaft timing oil control unit housing (bolt and nut)
21--
Va
ria
ble camshaft timi
ng oil control solenoid
12--
Wa
ter pump pulley
12--

8. Remove the
drive belt from
the generator and accessory
drive.
1. Use a spanner e.g. Churchill JD - 230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left
against spring tension.
2. Whilst holding the tensioner against spring tension, remove the drive belt from the generator pulley.
Release the tensioner sl owly and remove the
spanner.
D
isconnect the belt from the
other pulleys and remove it.


9. Re
move the pulley from the water pump.
1. Remove the pulley securing screws.
2. Remove the pulley from the water pump.
10. Remove the belt tensione r assembly, from the Front
Accessory Drive. Refer to Operation 12.10.41.
11. Remove the idler pulley, from the Front Accessory Drive.
Refer to Operation 12.10.43.
12. Remove the crankshaft damper. Refer to Operation 12.21.09.
13. Carefully remove the engine covers, taking care not to
damage the plasti c fixings or the rubber inserts.
14. Disconnect the intake tube from the throttle body.
1. Remove the two bolts which secure the intake tube to the throttle body.
2. Disconnect the intake tube from the throttle body.

15
.
Reconnect the air flow meter multi-plug.
16. Refit the engine covers.
17. Refit the crankshaft damper. Refer to Operation 12.21.09.
18. Refit the idler pulley, to the Front Accessory Drive. Refer to
Operation 12.10.43.
19. Refit the belt tensioner assembly, to the Front Accessory
Drive. Refer to Operation 12.10.41.

20
.
Refit the pulley to the water pump.
1. Refit the pulley to the water pump.
2. Fit the pulley securing screws. Tighten as far as
possible; then to the correct torque after the belt has
been fitted.

21
.
Refit the drive belt to the generator and accessory drive.
Locat
e the belt around the pulleys, except the generator
pulley.
1. Use a spanner e.g. Churchill JD - 230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left
against spring tension.
2. Whilst holding the tensioner against spring tension, connect the drive belt to the generator pulley.
Release the tensioner sl owly and remove the
spanner.

22
.
Tighten the three screws wh ich secure the water pump
pulley, to 10-14 Nm.
23. Connect the top hose to the coolant outlet pipe.
1. Connect the top hose. Reposition the hose clip and tighten.

8. Remove the drive belt
from
the generator and accessory
drive.
1. Use a spanner e.g. Churchill JD - 230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left
against spring tension.
2. Whilst holding the tensioner against spring tension, remove the drive belt from the generator pulley.
Release the tensioner sl owly and remove the
spanner.
D i
sconnect the belt from the
other pulleys and remove it.


9. Remove t
he pulley from the water pump.
1. Remove the pulley securing screws.
2. Remove the pulley from the water pump.
10. Remove the belt tensione r assembly, from the Front
Accessory Drive. Refer to Operation 12.10.41.
11. Remove the idler pulley, from the Front Accessory Drive.
Refer to Operation 12.10.43.
12. Remove the crankshaft damper. Refer to Operation 12.21.09.
13. Carefully remove the engine covers, taking care not to
damage the plasti c fixings or the rubber inserts.
14. Disconnect the intake tube from the throttle body.
1. Remove the two bolts which secure the intake tube to the throttle body.
2. Disconnect the intake tube from the throttle body.

13. Reconnect the air cleaner cover.
Fit the five clips which secu re the air cleaner cover.

14. Connect the intake tube to the throttle body.
1. Connect the intake tube to the throttle body.
2. Fit the two bolts which secure the intake tube to the throttle body.
15. Reconnect the air flow meter multi-plug.
16. Refit the engine covers.
17. Refit the crankshaft damper. Refer to Operation 12.21.09.
18. Refit the idler pulley, to the Front Accessory Drive. Refer to
Operation 12.10.43.
19. Refit the belt tensioner assembly, to the Front Accessory
Drive. Refer to Operation 12.10.41.

20. Refit the pulley to the water pump.
1. Refit the pulley to the water pump.
2. Fit the pulley securing screws. Tighten as far as
possible; then to the correct torque after the belt has
been fitted.

21
.
Refit the drive belt to the generator and accessory drive.
Locat
e the belt around the pulleys, except the generator
pulley.
1. Use a spanner e.g. Churchill JD - 230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left
against spring tension.
2. Whilst holding the tensioner against spring tension, connect the drive belt to the generator pulley.
Release the tensioner sl owly and remove the
spanner.

22
.
Tighten the three screws wh ich secure the water pump
pulley, to 10-14 Nm.

23
.
Connect the top hose to the coolant outlet pipe.
1. Connect the top hose. Reposition the hose clip and tighten.

24
.
Connect the radiator top hose.
1. Connect the hose to the radiator.
2. Reposition the clip along the hose and tighten the clip.
25. Reset the bonnet to the normal position and connect the gas
struts.
26. Connect the battery and fit the battery cover.
Re
fer to the Battery Reconnection Procedure 86.15.15.
27. Refill the cooling system. Refer to Operation 26.10.01.


28

.
Remove the paintwork protection sheets and close the engine
compartment.