suspension JAGUAR XFR 2010 1.G Owner's Guide

Upper Control Arm
The forged-aluminum upper control arm is a wishbone design and connects to the vehicle body through two plain bushes, and
links to the swan neck wheel knuckle by an integral ball joint. The upper control arm is inclined to provide anti-dive
characteristics under heavy braking, while also controlling geometry for vehicle straight-line stability.

Lower Control Arm

The forged aluminum lower control arms are of the wishbone design; the arms separate to allow for optimum bush tuning:

The rear lateral control arm is fitted with a bush at its inner end which locates between brackets on the subframe. The
arm is secured with an eccentric bolt which provides the adjustment of the suspension camber geometry. The outer end
of the control arm has a tapered hole which locates on a ball joint fitted to the wheel knuckle. An integral clevis bracket
on the forward face of the lateral control arm allows for the attachment of the forward control arm. A bush is fitted
below the clevis bracket to provide for the attachment of the stabilizer bar link. A cross-axis joint is fitted to a
cross-hole in the control arm to provide the location for the clevis attachment of the spring and damper assembly.
The forward control arm is fitted with a fluid-block rubber bush at its inner end which locates between brackets on the
subframe. The arm is secured with an eccentric bolt which provides adjustment of the castor and camber geometry. The
outer end of the control arm is fitted with a cross-axis joint and locates in the integral clevis bracket on the lateral
control arm.

Wheel Knuckle

The cast aluminum wheel knuckle is a swan neck design and attaches to the upper control arm and lower lateral control arm.
The lower lateral control arm locates on a non serviceable ball-joint integral with the wheel knuckle. The lower boss on the
rear of the knuckle provides for the attachment of the steering gear tie-rod ball joint.
The wheel knuckle also provides the mounting locations for the:
wheel hub and bearing assembly
the wheel speed sensor (integral to the wheel hub and bearing assembly)
brake caliper and disc shield.

Stabilizer Bar

The stabilizer bar is attached to the front of the subframe with bushes and mounting brackets. The pressed steel mounting
brackets locate over the bushes and are attached to the cross member with bolts screwed into threaded locations in the
subframe. The stabilizer bar has crimped, 'anti-shuffle' collars pressed in position on the inside edges of the bushes. The
collars prevent sideways movement of the stabilizer bar.

The stabilizer bar is manufactured from 32mm diameter tubular steel on supercharged models and 31mm diameter tubular
steel on diesel and normally aspirated models and has been designed to provide particular characteristics in maintaining roll
rates, specifically in primary ride comfort.

Each end of the stabilizer bar curves rearwards to attach to a ball joint on a stabilizer link. Each stabilizer link is secured to a
bush in the lower lateral arm with a bolt and locknut. The links allow the stabilizer bar to move with the wheel travel providing
maximum effectiveness.

The only difference between the front stabilizer bars, in addition to the diameter, is in the shape to accommodate engine
variant:

a slightly curved bar, between bush centers, for V6 diesel (31 mm dia) and V8 gasoline supercharged (32 mm dia),
a straight bar, between bush centers, for V6 and V8 normally aspirated gasoline engines (31 mm dia).
Spring and Damper Assembly

The spring and damper assemblies are located between the lower lateral arm and the front suspension housing in the inner
wing. Dependant on vehicle model there are three types of coil spring and damper available:
a standard oil passive damper (All models except supercharged),
an adaptive damper, also known as Computer Active Technology Suspension (CATS) on 4.2L supercharged vehicles up to
2010MY, For additional information refer to Vehicle Dynamic Suspension 4.2L.
a continuously variable adaptive damper, also known as Adaptive Dynamics System on 5.0L supercharged vehicles from
2010MY. For additional information refer to Vehicle Dynamic Suspension 5.0L.

The dampers are a monotube design with a spring seat secured by a circlip onto the damper tube. The damper's lower
spherical joint is an integral part of the lateral lower control-arm, and the damper takes the form of a clevis-end, which
straddles the spherical joint.

The damper piston is connected to a damper rod which is sealed at its exit point from the damper body. The threaded outer
end of the damper rod locates through a hole in the top mount. A self locking nut secures the top mount to the damper rod.
The damper rod on the adaptive damper has an electrical connector on the outer end of the damper rod.

Supercharged 4.2L vehicles up to 2010MY: The adaptive damper functions by restricting the flow of hydraulic fluid through
internal galleries in the damper's piston. The adaptive damper has a solenoid operated valve, which when switched allows a
greater flow of hydraulic fluid through the damper's piston. This provides a softer damping characteristic from the damper. The
adaptive damper defaults to a firmer setting when not activated. The solenoid is computer controlled and can switch between
soft and hard damping settings depending on road wheel inputs and vehicle speed.

Supercharged 5.0L vehicles from 2010MY: The variable damper functions by adjustment of a solenoid operated variable orifice,
which opens up an alternative path for oil flow within the damper. When de-energized the bypass is closed and all the oil flows

Front Suspension - Front Suspension
Diagnosis and Testing

Principle of Operation Published: 17-May-2012

For a detailed description of the suspension system, refer to the relevant Description and Operation section of the workshop
manual.REFER to: (204-01 Front Suspension)

Front Suspension (Description and Operation), Front Suspension (Description and Operation), Front Suspension (Description and Operation).
Inspection and Verification

1. Verify the customer concern

2. Visually inspect for obvious signs of damage and system integrity



3. If an obvious cause for an observed or reported condition is found, correct the cause (if possible) before proceeding to
the next step
4. If the fault is not visually evident, verify the symptom and refer to the following Symptom Chart

Symptom Chart
Symptom Possible Cause Action Evidence of fluid on suspension damper
Fluid on damper from an external source
Fluid leaking from damper
Damper not faulty, do not renew
GO to Pinpoint Test A.
PINPOINT TEST A : DAMPER FLUID LEAK DIAGNOSIS TEST CONDITIONS DETAILS/RESULTS/ACTIONS A1: ASSESS LEAK NOTES:


Residual oil left over from the damper assembly process may create oil staining on the damper tube. This will not affect
the function of the damper.
Slight seepage is considered normal. 1 Assess the extent of the oil leakage Is the leakage serious enough to indicate that the damper seal has failed? Yes
GO to Pinpoint Test B. No
Damper not faulty, do not renew.
PINPOINT TEST B : CONFIRM LEAK TEST CONDITIONS DETAILS/RESULTS/ACTIONS B1: ROAD TEST 1 Clean all traces of oil from the damper 2 Drive the vehicle over a speed bump or similar ten times Is any fluid visible on the outside of the damper? Yes
GO to Pinpoint Test C. No
Damper not faulty, do not renew.
PINPOINT TEST C : DAMPER STICKOUT TEST TEST CONDITIONS DETAILS/RESULTS/ACTIONS C1: DAMPER STICKOUT TEST Mechanical

Damaged suspension dampers Visual Inspection

NOTE: If a significant quantity of fluid has leaked out of the damper, the dividing piston will be displaced upwards in the
tube by the pressure of the gas below it. This will limit the downward travel of the piston. 1 Remove the suspension strut assembly REFER to: Front Shock Absorber (204-01 Front Suspension, Removal and Installation). 2 Remove the spring 3 Remove the bump stop 4 Push the damper piston fully into the damper tube

5 Measure and record the stickout dimension (the distance between the damper tube cap and the piston rod shoulder) Is the stickout dimension greater than 12.0mm?
Yes
Damper unserviceable. Install a new suspension damper.
Enclose a record of the stickout dimension with the returned
part.
No
Damper serviceable. Re-assemble and re-install the
suspension strut
REFER to: Front Shock Absorber (204-01 Front Suspension, Removal and Installation).

Front Suspension - Front Shock Absorber
Removal and Installation Published: 09-Oct-2012



NOTES: Removal

Fuse box release only required on removal of the RH front shock absorber.


Expansion tank release only required for supercharged variant removal of the LH front shock absorber.

All vehicles

1. WARNING: Do not work on or under a vehicle supported only by a
jack. Always support the vehicle on safety stands.

Raise and support the vehicle.

2. Remove the front wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

3. Remove the front stabilizer bar link.
For additional information, refer to: Front Stabilizer Bar Link (204-01 Front Suspension, Removal and Installation).

4. Release the front shock absorber from the lower arm.
5. CAUTIONS:


Make sure the wheel knuckle is supported. Failure to
follow these instructions may result in damage to the vehicle.


Use an Allen key to prevent the ball joint rotating whilst
removing the nut.
Disconnect the upper arm from the wheel knuckle.





6. Lower the vehicle.

8. CAUTIONS:


Use an Allen key to prevent the ball joint rotating whilst
installing the nut.


Make sure the wheel knuckle is supported. Failure to
follow these instructions may result in damage to the vehicle.
Secure the upper arm to the wheel knuckle.
Tighten the nut to 90 Nm.





9. Connect the front shock absorber and spring assembly to the
lower arm.
Tighten the bolt to 175 Nm.











10. Install the front stabilizer bar link.
For additional information, refer to: Front Stabilizer Bar Link (204-01 Front Suspension, Removal and Installation).

11. Install the front wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

12. Lower the vehicle.

Front Suspension - Front Lower Arm
Removal and Installation
Removal Published: 11-May-2011

1. WARNING: Do not work on or under a vehicle supported only by a
jack. Always support the vehicle on safety stands.

Raise and support the vehicle.

2. Remove the air deflector.
For additional information, refer to: Air Deflector (501-02 Front End Body Panels, Removal and Installation).

3. Remove the front wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

4. NOTES:


Note the fitted position.

RH illustration shown, LH is similar
Release the front lower arm.
Remove the 2 bolts and discard the nuts.






Installation


1. NOTE: RH illustration shown, LH is similar

Install the front lower arm.
Install the bolt and tighten the new nut to 60 Nm +
135 degrees.
Install the front lower arm inner retaining nut and
bolt, but do not fully tighten at this stage.








2. Install the front wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

3. Lower the vehicle.

Panels, Removal and Installation).


3. WARNING: Do not work on or under a vehicle supported only by a jack.
Always support the vehicle on safety stands.
Raise and support the body.

4. Remove the wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

5. Remove the stabilizer bar link.
For additional information, refer to: Front Stabilizer Bar Link (204-01 Front Suspension, Removal and Installation).

6. Release the tie rod. Ball joint splitter
204-327 Special Tool(s)

5. Remove and discard the retaining straps.
6. Install the steering gear.
Tighten the bolts to 100 Nm.











7. Secure the tie rod end.
Tighten the nut to 55 Nm.

8. Install the stabilizer bar link.
For additional information, refer to: Front Stabilizer Bar Link (204-01 Front Suspension, Removal and Installation).

9. Install the wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

10. Lower the body.


11. CAUTION: The final tightening of the upper arm must be
carried out with the vehicle on it's wheels.
Tighten to 175 Nm.










12.
Install the engine undertray.
For additional information, refer to: Air Deflector (501-02 Front End Body Panels, Removal and Installation).

13. Using only four-wheel alignment equipment approved by Jaguar, check

(204-00 Suspension System - General Information, General Procedures).

Front Suspension - Rear Lower Arm Bushing
Removal and Installation

Special Tool(s)


Rear lower arm bushing remover and installer
204-464

Rear lower arm bushing remover
204-333

Rear lower arm bushing installer
204-332

Rear lower arm bushing installer
204-465

Rear lower arm bushing installer
204-334
Removal

CAUTION: Nuts and bolts must be tightened with the weight of the vehicle on the suspension. Published: 11-May-2011


1. WARNING: Do not work on or under a vehicle supported only by a jack.
Always support the vehicle on safety stands.
Raise and support the vehicle.

2. Remove the rear lower arm.
For additional information, refer to: Rear Lower Arm (204-01 Front Suspension, Removal and Installation).