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TECHNICAL BULLETIN
LTB00557NAS1
27 SEP 2013
© Jaguar Land Rover North America, LLC
NOTE: The information in Technical Bulletins is intended for use by trained, professional Technicians with the knowledge, tools, and
equipment required to do the job properly and safely. It informs these Technicians of conditions that may occur on some vehicles, or
provides information that could assist in proper vehicle service. The procedures should not be performed by 'do-it-yourselfers'. If you
are not a Retailer, do not assume that a condition described affects your vehicle. Contact an authorized Land Rover service facility to
determine whether this bulletin applies to a specific vehicle.

SECTION: 204-00

Knock Sound From Front Suspension
AFFECTED VEHICLE RANGE:
Range Rover (LG)
Model Year:
2013-2014
VIN:
DA000083 Onwards

Engine:

V8 S/C 5.0L Petrol

MARKETS:
NAS

CONDITION SUMMARY:
Situation: A knock sound from the front suspension may be heard inside the vehicle when traveling over an uneven
road surface. The sound may be noticeable, when one of the front wheels travels over a uneven surface while the
opposite front wheel remains on a smooth surface.
Cause: This may be caused by the operation of the Dynamic Response system actuators.
Action: Should a customer express this concern, follow the Service Instruction outlined below.

PARTS:

NOTE: If required, an allowance of £35.00 (approximately $53.65 US) for the Dynamic Response system
fluid (Texaco cold climate fluid PSF14315 [33270]) and Loctite 243 has been provided and should be claimed
using code 'ZZZ001'.
LR052058

Front Stabilizer Actuator (if required)

Quantity: 1

LR038766

Bolt (M12x55mm) (if required)

Quantity: 4

LR045743

Bolt (M14x55mm) (if required)

Quantity: 2

LR045788

M12 steel Repair Insert (if required)

Quantity: 4

LR043320

M14 Steel Repair Insert (if required)

Quantity: 2

RVW500010

O-Ring Seal (if required)

Quantity: 2

BTR6506

Insulation pad (if required)

Quantity: 1

LR054850

Engine mounting (if required)

Quantity: 2

TYG500141

Bolt (required only with engine mount replacement)

Quantity: 6

QYG500090

Bolt (required only with engine mount replacement)

Quantity: 1

TOOLS:
Refer to Workshop Manual for any required special tools.

WARRANTY:
NOTE: Repair procedures are under constant review, and therefore times are subject to change; those
quoted here must be taken as guidance only. Always refer to TOPIx to obtain the latest repair time.

http://topix.landrover.jlrint.com/topix/service/document/439502

9/30/2013

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NOTE: DDW requires the use of causal part numbers. Labor only claims must show the causal part
number with a quantity of zero.
DESCRIPTION

SRO

TIME (HOURS)

CONDITION CODE

CAUSAL PART

Carry out suspension diagnostics

05.11.10

1.0

42

LR046089

Fit new actuator

60.60.50

1.60

42

LR046089

Fit steel inserts to subframe

60.35.74

2.30

42

LR046089

Remove strut brace bars

05.10.40

0.40

42

LR046089

Engine mounting - Renew - Set

12.45.20

4.0

42

LR051515

NOTE: Normal Warranty policies and procedures apply.

SERVICE INSTRUCTION:
Table 1 - Front Suspension Knock Diagnostic Test

NOTE: Prior to continuing with this bulletin, if the concern appears to be a 'click' sound from under the
hood on rapid acceleration/deceleration/braking, the most likely cause is the engine mountings. Replace both
engine mountings (see TOPIx Workshop Manual, section 303-01D: Engine - V8 S/C 5.0L Petrol) To be carried
out as a separate claim.
Step

Question

Action (Yes)

Action (No)

A

Have the joint torques been
checked?

Go to step B.

Check torques. Reference Service
Instruction.

B

Do pipes, hoses, and valve
block have sufficient clearance?

Go to step C.

Check clearances. Reference Service
Instruction.

C

Does the knock occur during
light acceleration or
deceleration?

The issue is unlikely to be
caused by the Dynamic
Response system. Investigation
of other components required
(suspension bushes,
transmission, etc.).

Disconnect Adaptive Damping electrical
connector from the top of the front air
spring/damper. Reference Service
Instruction graphic E145474. Go to step D.

D

Does the knock improve if
Adaptive Damping electrical
connectors at the shock
absorber are removed? (A
warning light will illuminate on
the Instrument Cluster [IC].
This will extinguish on
reconnecting of the dampers
and following an ignition cycle.)

Reconnect the Adaptive Damping
electrical connector at the shock
absorber. Disconnect the front
right-hand (RH) drop link from
the active stabilizer bar (see
TOPIx Workshop Manual section
204-06: Ride and Handling
Optimization). Go to step E.

Reconnect the Adaptive Damping electrical
connector at the shock absorber. The issue
is unlikely to be caused by the Dynamic
Response system. Investigation of other
components required (engine mounts,
suspension bushes, transmission, etc.).

E

Does the front stabilizer drop
link exhibit abnormal free play
(as compared to a vehicle
without the knock present)?

Replace drop link.

Go to step F.

F

Does the roll bar arm have less
than ±10mm of movement and
feel stiff to move, coming up to
a firm stop (not spongy)?

Fluid system OK. Reconnect the
right-hand (RH) drop link to the
stabilizer bar (see TOPIx
Workshop Manual section 20406: Ride and Handling
Optimization).

More than ±10mm travel observed AND/OR
spongy feeling will require system re-bleed.
Initially bleed Dynamic Response front
actuator only (see TOPIx Workshop Manual
section 204-06: Active Stabilization System
Bleeding). If this does not rectify bleed
issues, then full system bleed will be
required. Perform 'Active Stabilization
system Bleeding' as detailed in TOPIx.

Table 2 - Torque Specification – Front Suspension

http://topix.landrover.jlrint.com/topix/service/document/439502

9/30/2013

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Joint Description

Torque

Nominal

Graphic

P1 Upper Control Arm to Body

60-90Nm

75Nm

E149026

P2 Upper Control Arm to Body (Rear Mt)

60-90Nm

75Nm

E149026

P3 Lower Control Arm to Frame

190-340Nm

-

E156341

P4 Lower Control Arm to Frame

190-340Nm

-

E146696

P6 Lower Ball Joint Knuckle (Lateral Arm)

290±17Nm

290Nm

E146695

P7 Upper Control Arm to Knuckle

70+/-10Nm

70Nm

E145575

P40 Lower Ball Joint Knuckle (Lower Arm Front)

290±17Nm

290Nm

E156342