Joint JAGUAR X308 1998 2.G Repair Manual

Description of General Stee
ring System Noises
Boom
Rh
ythmic sound like a drum roll or distant
thunder. May cause pressure on the ear drum.
Buzz
Low-pitched soun
d, like a bee. Usually associated with vibrations.
Chatt

er
Rapidly rep

eating
metallic sound.
Chuckle
Rapid noise that soun
ds like
a stick against the spokes of a spinning bicycle wheel.
F
eedback (knocking noises in the
steering gear) - condition where roughness is felt in the steering
wheel by the driver when the vehicle
is driven over rough surfaces
REF
ER to Section 211
-0
3 Steering Linkage
.
Steeri

ng gear
retaining bolts
loose or damaged.
CAU
TION: DO NOT attempt to adjust the
steering gear yoke. Failure to follow this instruction
will result in the steering gear warranty to become
invalid.
CHECK
and TIGHTEN the steering gear
retaining bolts.
INST
ALL new retaining bolts as necessary.
For additional information,
REFER to Section 211
-0
2 Power Steering
.
L

oose suspension
bushing, bolts or ball joints.
TIGHTE
N or INSTALL new components as
necessary. For additi onal information,
REFER to Section 204
-01
Front Suspension
.
Steeri

ng column
retaining bolts loose.
CAU
TION: DO NOT attempt to adjust the
steering gear yoke. Failure to follow this instruction
will result in the steering gear warranty to become
invalid.
CHECK
and TIGHTEN the steering column
retaining bolts/nuts and pinch bolts if required. For additional information,
REFER to Section 211
-0
4 Steering Column
.
Exce

ssive wear in
steering column assembly.
CHECK
for steering column for wear in the
universal joints and be arings. If wear is
present, INSTALL a new steering column as
necessary. For additi onal information,
REFER to Section 211
-0
4 Steering Column
.
Ni

bble (Shimmy) Oscillation of the
steering wheel (not vertical which is SHAKE). This is driven by road wheel imbalance.
Road wh
eel
imbalance.
CHECK
for road wh
eel imbalance.
CHECK for
rele
vant SERVICE
BULLETINS/SERVICE ACTIONS for the
vehicle on Jaguar Communications Online (JCOL) or in hard copy form.
S
teering wheel
replacement.
CHECK for
rele
vant SERVICE
BULLETINS/SERVICE ACTIONS for the
vehicle on Jaguar Communications Online (JCOL) or in hard copy form.
Rac
k replacement.

CHECK for
rele
vant SERVICE
BULLETINS/SERVICE ACTIONS for the
vehicle on Jaguar Communications Online (JCOL) or in hard copy form.

Buzz (E
lectrical)
A
different steering buzz can be caused by
pulse width modulated (PWM) electric actuators used in variable assist steering
systems. This buzz is felt by turning the ignition key to run without starting the engine and holding onto the steering wheel.
In extreme cases, the buzz can be felt with the engine running also.
Column/Steering Wheel
Shake
Column shake is a low f
requenc
y vertical vibration excited by primary engine vibrations.
Nibble (Shimm
y)
Steeri
ng nibble is a rotary oscillation or
vibration of the steering wheel, which can be excited at a specific vehicle speed.
Nibble is driven by wheel and tire imbalance exciting a suspensi on recession mode, which then translates into steering gear
travel and finally steering wheel nibble.
Shudder (Judd
er)
Shudder i
s a low frequency oscillation of th
e entire steering system (tire, wheels, st eering gear and linkage, etc.) when the
vehicle is steered during static-park or at low sp eeds. Shudder is very dependent on road surface.
Torque Ri
pple
Torque rippl
e is a concern with Electric Power Steering (EPS) sy
stems. Torque ripple is most evident at static-park steering
the wheel very slowly from lock to lock. Torque ripple is primarily caused by motor commutation.
Torque/Veloc
ity Variation
(Phasing/Effort Cycling)
Steeri
ng wheel torque variation oc
curring twice in one revolution is normally as a result of problems with the lower steering
column (intermediate shaft), but foul cond itions generally result in either constant stiffnes s or single point stiffness.
Depending upon the orientation of the joints, the steering can fe el asymmetric (torque falling off in one direction and rising
in the other) or else it can simply have pronounced peaks and troughs as the steering moves from lock to lock.
Wheel Fight
(Kick Back)
W
heel fight is excess feedback of sudden road forces through th
e steering system and back to the driver. It is evaluated at
all vehicle speeds over cobblestones, rough roads, and potholes . The tires, wheels, and suspension generate forces into the
steering systems. Steering friction, hydraulic damping, hydr aulic compliance, mechanical compliance, steering ratio, and
assist gain all affect how much is transmitted to the driver.
Stee
ring Linkage
CAUTI
ON: Steering gear boots must be
handled carefully to avoid damage. Use new clamps when installing steering
gear boots.
Inspect the boots for cuts, deterioration, tw isting or distortion. Check the steering gear boots to make sure they are tight.
Install new boots or clamps as necessary.
• NOTE: The following steps must be carried out with assistance.
1. 1. With the wheels in the straight ahead po sition, gently turn the steering wheel to the left and the right to check for
free play.
2. 2. Free play should be between 0 and 6 mm (0 and 0.24 in) at the steering wheel rim. If the free play exceeds this
limit, either the ball joints are worn, the lower steering column joints are worn or the backlash of the steering gear
is excessive.

The steering rack assembly :
Is mounted on the
rear face of the
front suspension crossbeam by two forg ed mounting brackets with resilient
bushes. The bushes are handed (pinion side and non-pinion side) and are orientated according to the vehicle range
application.
Convert s
the rotary motion of the steering wheel, via the steering gear pinion, to the lateral motion of the rack.
F
e
atures a variable ratio steering
rack with integral hydraulic po wer steering cylinder and piston.
Has a hydrauli
c control valve with Servotronic co
ntrol and positive center feel torsion bar.
The basic steering rack assembly is not serviceable. The following components are serviceable items:
Transfer pipework
.
Servotronic valve. Cent
ralizing cap.

O
u
ter ball joint.
Rac
k
gaiter.
Clips and

fittings.
Steering Rack Components
It e
m
Par
t
Number
De
scr
iption
1—Front
su
spension crossbeam
2—Steeri
ng rack housi
ng
3—Hydraulic

control valve housing
4—Moun
ting bracke
t
5—Gait
er

6—Tie
rod

7—O
u
ter ball joint

Steering R
a
ck Assembly

P
arts List
It

em
Par
t Number
De
scription
1—Steeri

ng rack
2—Hydrau

lic control valve
3—Torsio

n bar
4—Pin

ion
5—O

perating cylinder and piston
6—Inne

r ball joint
7—Tie

rod

Steering
Linkage - Steering Linkage
Descriptio
n and Operation

Parts List
The left- and right-hand tie rod assemblies:
T
ransmit steering forces from the steering rack to the st
eering arms which are integral with the vertical links.
Comprise the tie rod, inner
ball joint,
outer tie rod end and outer ball joint.
P
rovide front road wheel toe setting by adju
stment of the threaded outer tie rod ends.
• NOTE: Steering geometry adjustments must only be carried out wi th the vehicle on turn plates to allow the wheels to move
during adjustment.
The left- and right-hand steering rack gaiters:
Are
installed between the steering rack and the tie bars.
Are

of the concertina type.
R

etain lubricant and prevent th
e ingress of foreign matter.
P
ermit movement of the steering rack and tie rods.


ItemPa
rt Number
Descript
ion
1—St

eering rack assembly
2—St

eering rack gaiter
3—I

nner ball joint
4—Tie

rod
5—O

uter tie rod end
6—Lo

ck-nut
7—Oute

r ball joint
8—O

uter ball joint nut

The lower steeri ng col
umn:
Is a han
ded assembly
.
Incorporates
a col
umn to toeboard seal
which comprises a rolling element having two, low friction, PTFE rings. The
rolling element locates in a rubber b oot which seals to the toeboard.
Has a lowe
r universal joint connecting the
lower column to the steering rack.
Has an upper un
iversal joint connecting
the lower column to the upper column.
Has a NVH damper in
corporated into
the upper universal joint assembly.
May be installed in an
y orientation on the universal joint splines.
R
e
quires no setting or adjustment.
Has no s
e
rviceable components.
It is essential to disconnect the lower column from the steer ing rack before removing the engine or front suspension
crossbeam.


It e
m
Par
t
Number
De
scr
iption
1-Boot
2-Uni
v
ersal joint to upper column
3-Lower steeri
ng col
umn shaft
4-R
e
taining bolts
5-Uni
v
ersal joint to steering rack

Lower Steering Column

Steering Column - Steering Colu
mn Lower Shaft
Re
moval and Installation
Remov

al
1.
Raise
and support the vehicle.
For additional informat ion, refer to Section 100
-0
2 Jacking and
Liftin

g
.

2. De
tach the steering
column lower shaft.
1. Loosen the steering column lower shaft sliding joint retaining bolt.
2. Remove and discard the st eering column lower shaft
retaining bolt.
3. Detach the steering column lower shaft.
3. Lower the vehicle.

4. Remove an
d discard the steering
column lower shaft retaining
bolt.

5. De
tach the steering
column lower shaft.
6. Remove the steering column lower shaft.
De
tach the boot.

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--

2.
Release the carrier from
the two ring dowels and
remove it.

6. Re
move the seals from the bush carrier.
1. Remove the sealing ring (scarf jointed) from the
carrier bush groove.
2. Remove the O-ring from the carrier oil-way recess.

7. Re
move the VVT bush carrier from the B-Bank.
1. Remove the two bolts and one nut which secure the carrier to the cylinder block.
2. Release the carrier from the two ring dowels and
remove it.

8. Re
move the seals from the bush carrier.
1. Remove the sealing ring (scarf jointed) from the
carrier bush groove.
2. Remove the O-ring from the carrier oil-way recess.
9. Raise the vehicle on a ramp.
10. Remove the crankshaft position sensor.
1. Remove the bolt which secures the crankshaft position sensor to the flywheel housing.
1. Re move
the sensor and allow it to hang free under
the engine.

13. Tigh
ten the exhaust camshaft
sprocket securing bolt.
1. Fit the chain tensioner tool 303 - 532 to the sprocket holes.
1. Apply force to the to
ol in
an anti-clockwise direction
to tension the chain on its drive side.
2 .
Whilst applying the opposing force to the sprocket
and chain, tighten the sprock et securing bolt to 115 -
125 Nm.

14 . Tigh
ten the VVT unit securing bolt.
1. Whilst still applying the opposing force to the
sprocket and chain (using 303 - 532), check that the
wedges are still in place, tighten the VVT unit
securing bolt to 115 - 125 Nm.
R e
move the chain tensioning
tool and the wedge(s).
15. Remove the camshaft locking tool 303 - 530.
16. Raise the vehicle on the ramp.
17. Remove the crankshaft setting tool 303 - 531.

18 . R
efit the crankshaft position sensor.
1. Fit the sensor to the fl ywheel housing and fit the
securing bolt. Tighten to 8 - 12 Nm.
2. Refit the access grommet to the housing.
19. Lower the ramp.
20. Fit new seals to the VVT bush carrier, A-Bank.
1. Fit the new sealing ring ( scarf jointed) to the carrier
bush groove.