1998 JAGUAR X308 Adaptive

Front Suspension -
Lubri
cants, Fluids, Sealants and Adhesives
Press-In Loads
Torques


UnitS
pecification
Loctite27

0
Greas

e
Shell Retin
ax 'A'
Greas

e
Castro
l 'NTR'
Com

ponent
Kn
Ball join

t to upper wishbone
25
- 50
B

all joint to lower wishbone
25
- 50
Com

ponent
Nm
N

ut - ball joint, upper wishbone to vertical link.
60
-80
N

ut - ball joint, lower wishbone to vertical link.
60
-80
Nu

t - fulcrum bolt, upper wishbone.
60
-80
N

ut - ball joint, tie rod to steering arm.
71
-85
Bol

t - wheel speed sensor to vertical link.
8-1
0
Bol

t - front mounting to crossbeam.
22
-28
Bolt

- mounting , stabilizer bar.
30
-40
N

ut - link arm ball joint to stabilizer bar.
60
-80
Bolt

- mounting, steering rack to crossbeam.
41
-54
B

olt - front mounting, crossbeam to body.
22
-28
Bol

t - spring pan to lower wishbone.
70
-90
N

ut - shock absorber to upper mounting
(vehicles with adaptive damping).
16
-18
Nu

t - shock absorber to upper mounting (vehicles without adaptive damping).
30
-40
N

ut - shock absorber lower to wishbone.
43
-57
B

olt - engine Hydramount to crossbeam.
34
-46
B

olt - crossbeam rear mounting to body.
13
1-185
Bol

t - generator cooling du
ct deflector to crossbeam.
17
-23
N

ut - lower steering column to pinion shaft.
22
-28
N

ut - hub, speed sensor rotor.
27
0-330
B

olt - shield, brake disc.
9-1
2
Bol

t - lower wishbone, front arm to rear arm.
77
-103
Nu

t - stabilizer bar link arm to wishbone bracket.
41
-54
N

ut - wishbone front
eccentric bolt.
11
3-153
Nu

t - wishbone rear
eccentric bolt.
11
3-153
N

ut - fulcrum shaft, upper wishbone.
60
-80
Bolt -

power steering pi
pes to pinion housing.
9-1
2

Upper
Wishbones
Each
upper wi
shbone assembly is a on
e-piece steel forging incorporating:
A pres
s-fit ball joint.
Press-fi

t bushes for location of the upper fulcrum bolt.
Lower Wishbones
Each l
o
wer wishbone comprising
forged steel front and rear arms bolted together, incorporates:
A p
ress-fit ball joint in the outer extremity of the rear arm.
Press-f
i
t bushes for location of the lower fulcrum bolts
Locati
on for the shock absor
b
er lower mounting plates.
Vertica l Links

The vertical
links are of forged steel
wi
th integral steering arms. Each is suppo rted between the upper and lower wishbones
by two ball joints and carries:
Front hub

Brake ca
liper and disc shield assembly

ABS se
nsor
.
Front Hub
s

Each f
o
rged steel front hub accommodates sealed for life cartridge
type wheel bearings, and carries:
The brake rotor assembl
y.
A
h
ub nut with toothed, integral ABS rotor.
Su
s
pension spring pi
n locking device.
Front Road
Springs
The road spri
ng
s are of coil type with their
rating dependent upon vehicle specification
Ea
ch spring is installed between the suspension crossbeam location and the lower wishbone spring pan.
Ru
bber seats ar
e installed betw
een the spring and the crossb eam and the spring pan.
Front Shock A
bsorbers
Th
e
shock absorbers are telescopic hydrau
lically operated units. Optional adaptive damping units incorporate a solenoid-
operated control valve at their upper extremity.
Each shoc
k absorber is installed between the lowe
r wishbone rear arm and a recess in the body.
The l
o
wer end of the shock absorber is se
cured to plates on the wishbone by a bolt that also serves as a pivot.
The u
pper en
d of each shock absorber is secured to the body location by a single nut.
Front Sta
b
ilizer Bar
A
front stabil
izer bar installed on all vehicles
is rated according to suspension specification.
Opera
tion
As each road wheel r
i
ses, move
ment is transmitted through the vertical link assembly to the lower wishbone. The resulting
rise of the wishbone compresses the road spring and partially telescopes the shock absorber. During this action, the spring
absorbs associated shocks and the shock absorber minimizes sprin
g os c
illation.

Du

ring cornering, vehicle weight
is transferred to the outer road wheel with a resulting tendency for the inner wheel to lift.
The stabilizer bar assists in minimizing this tendency by transf erring a proportion of potential lift of the inner wheel to the
outer wheel. This result s in enhanced body stability with improved corner ing capabilities.

6. Ra
ise the front of the vehicle
and support on axle stands.
For additional informat ion, refer to Section 100
-02
Jacking and
Liftin
g.
7. Re
move the appropriate road wheel.
For additional informat ion, refer to Section 204
-04 W
heels and
Tire
s.

8. On
vehicles with adaptive damping:
Di
sc
onnect the shock absorber electrical connector by
pressing the lugs down and pulling the connector up.

9. Re
move the shock absorber from the upper mounting.
Posi
ti
on a wrench on the shock absorber shaft flats to
prevent rotation (wrench in socket on vehicles with
adaptive damping).
Re
move the shock absorber
upper retaining nut.
Remove the u
pper washer and isolator.

10 . De
tach the shock absorber.
R
e
move the lower shock ab
sorber retaining nut.
Re
move the lower shock ab
sorber retaining bolt.
11. Remove the shock absorber through the lower wishbone.

I
nstallation


1.
Install th
e shock absorber through the lower wishbone.

2. Att
ach the shock absorber.
Inst

all the lower shock ab
sorber retaining nut.
Ins
tall the lower shock absorber retaining bolt.
Ti

ghten to 43 to 57 Nm.

3. At
tach the shock absorber to the upper mounting.
Install th

e upper washer and isolator.
Inst

all the shock absorber upper retaining nut.
Posi

tion a wrench on the shock absorber shaft flats to
prevent rotation (wrench in socket on vehicles with
adaptive damping).
Tigh
ten the shock absorber upper lock nut to 30-40 Nm
(16-18 Nm on vehicles with adaptive damping).
4. CAUTION: Make sure the adaptive damping electrical
connector is correctly aligned. Failu re to follow these instructions
may cause damage to the electrical connector.
On vehicles with adaptive damping:

Each r
oad spring and is located between the wishbone in
tegral spring seat and the body suspension turret.
Each shoc
k absorber unit is installed
co-axially within the road spring.
The lo
wer end of each shock absorber is secured to the
wishbone by a bolt which also functions as a pivot.
Adaptive damping is av
ailable as an option.
A
rear stabi
lizer bar is installed on
Supercharged and Sport Suspension models . Mounted at the rear of the wishbone
tie assembly, the stabilizer bar is connected to the wishbone by short links.
Op era
tion
As each road wheel r
i
ses, move
ment is transmitted through th e hub carrier assembly to the wishbone and axle shaft. The
corresponding rise of the wishbone compre sses the road spring and partially telescopes the shock absorber. During this
action, the spring absorbs result ing shocks and the shock absorber minimizes spring oscillation.
During cornering, vehicle weight is transferred to the outer road wheel with a resulting tendency for the inner wheel to lift.
On Supercharged and Sport Suspension vehicl es, a rear stabilizer bar assists in minimizing this tendency by transferring a
proportion of potential lift of the inner wheel to the outer wheel. This results in enhanced body stability with improved
cornering capabilities.

6. On
vehicles with adaptive damping:
R
e
move the top cover from
the shock absorbers.
Disc
onnect the shock absorber electrical connectors by
pressing the lugs down and pulling the connectors up.

7. NOTE : R
ight-hand shown, left-hand similar
Remove shock absorber upper mo unting plates to body nuts.

8. Fully slacken bu
t do not remove the parking brake cable
adjuster nut.
9. Release the parking brake cabl e from the connecting clip.

13. Inst
all the exhaust brackets.
Position exha

ust mounting bracket on subframe.
Inst
al
l bolts and nuts.
Tigh
te
n to 22-28 Nm.

14 . Route the
left hand parking brake cable through the
equalizer.

15 . Install th
e parking brake cable
in to the connecting clip.
16. Adjust the parking brake cable. Refer to 70.35.10.
17. CAUTION: Make sure the adaptive damping electrical
connector is correctly aligned. Failu re to follow these instructions
may cause damage to the electrical connector.
On vehicles with adaptive damping:
Conne ct
the shock absorber elec
trical connector, ensuring
the electrical connector key locates in the socket keyway.

13
.
Using the special tools 204-179-1, secure the upper mounting
to the spring.

14
.
Using a jack, retract the shock absorber through the
wishbone aperture.

15
.
Position a bolt through the spring coils and shock absorber
lower-bush, to temporarily locate the shock absorber.
16. Partially lower the jack for a ccess to the top of the shock
absorber.
17. On vehicles with adaptive damping:
Di
sconnect the shock absorber electrical connector by
pressing the lugs down and pulling the connector up.