tyres ASTON MARTIN V8 VANTAGE 2010 Workshop Manual

Contents
Issue 5, January 2010 Workshop Manual 0-0-3
V8 Vantage Workshop Manual
Contents
IntroductionWelcome .............................................................. 0-0-6
Safety Precautions ................................................. 0-0-7
Lifting and Jacking ................................................. 0-0-9
Vehicle Recovery ................................................ 0-0-10
Vehicle Identification Number ............................ 0-0-11
Body System (01.00) Body Structure (01.01) .......................................... 1-1-4
Front End System (01.02) ...................................... 1-2-1
Body Closures (01.03) ........................................... 1-3-1
Interior Trim (01.05) ............................................. 1-4-1
Exterior Trim (01.08) ............................................. 1-8-1
Mirrors (01.09) ...................................................... 1-9-1
Seating (01.10).................................................... 1-10-1
Glass, Frame and Mechanism (01.11) .................. 1-11-1
Instrument Panel (IP) (01.12) . .............................. 1-12-1
Handles and Lock Mechanisms (01.14) ............... 1-14-1
Wipers and Washer System (01.16)..................... 1-16-1
Convertible Roof and Roof Opening
Subsystem (01.17)................ ...............................1-17-1
Bumpers (01.19) ................................................. 1-19-1
Restraining Devices (01.20) .... ............................. 1-20-1
Frame and Mounting (02.00) Subframes (02.03) ................................................. 2-1-2
Engine System (03.00) Engine Assembly....................................................3-0-3
Engine Structure (03.01)........................................ 3-1-1
Lubrication System (03.02).................................... 3-2-1
Cooling System (03.03) ......................................... 3-3-1
Fuel Charging System (03.04) ................................ 3-4-1
Accessory Drive System (03.05)............................. 3-5-1
Engine Cranking System (03. 06) ............................ 3-6-1
Valve Train (03.09) ............................................... 3-9-1
Engine Sealing (03.10)......................................... 3-10-1
Power Conversion (03.11)................................... 3-11-1
Evaporative Emissions (03.13) ............................. 3-11-1
Engine Management System (0 3.14).................... 3-14-1
Throttle Control (03.16) ...... ................................ 3-16-1
Foot Operated Control (03.18)............................ 3-18-1
Suspension (04.00) Road Wheel Alignment (04.00) ............................. 4-0-2
Front Suspension (04.01)....................................... 4-1-1
Rear Suspension (04.02)........................................ 4-2-1
Shock Absorber System (04.03) ............................. 4-3-1
Road Wheels and Tyres (04.04) ............................ 4-4-1
Driveline (05.00) Driveshaft (05.01) ................................................. 5-1-2
Halfshafts (05.05) .................................................. 5-2-1 Brake System (06.00)
Front Disc Brake (06.03) ....................................... 6-3-2
Rear Disc Brakes (06.04) ....................................... 6-4-1
Hand Brake (06.05) .............................................. 6-5-1
Brake Actuation System (06.06 ) ............................ 6-6-1
Power Brake System (06.07) ................................. 6-7-1
Anti-lock Braking System (06.09)........................... 6-9-1
Transmission (07.00) Transmission Cooling (07.02) ................................ 7-0-2
Manual Transmission (07.03) ................................ 7-3-1
Automatic Control System (07.05)......................... 7-5-1
Manual Control System (07.06) ............................. 7-6-1
Automatic Shifting Subsytem (07.11) .................. 7-11-1
Clutch (08.00) Clutch Controls (08.02) ......................................... 8-1-2
Exhaust (09.00) Exhaust Overview ................................................. 9-1-2
Silencer Assembly (09.01) ..................................... 9-1-3
Pipes and Supports (09.03) ................................... 9-2-1
Exhaust Protection (09.04) .................................... 9-3-1
Fuel (10.00) Fuel Tank and Lines (10.01) ................................ 10-1-2
Steering (11.00) Steering Gear (11.01) .......................................... 11-1-2
Power Steering (11.02)........................................ 11-2-1
Steering Column (11.04) ..................................... 11-4-1
Steering Column Switches (1 1.05) ....................... 11-5-1
Steering Wheel (11.06) ....................................... 11-6-1
Climate Control (12.00) Body Ventilation system (12.01) .......................... 12-1-2
Heater System (12.02) ........................................ 12-2-1
Air Conditioning (A/C) System (12.03) ................. 12-3-1
Information, Gauge and Warning (13.00) Instrument Cluster (13.01) .................................. 13-1-2
Power Supply (14.00) Battery System (14.01) ........................................ 14-1-2
Alternator and Regulator System (14.02) ............. 14-2-1
Vehicle Entertainment (15.00) Audio System (15.01)................................ ..........15-1-2
Antenna (15.02).................................................. 15-2-1
Vacuum Distribution (16.00) Body Vacuum System (16.01) ............................. 16-1-2
Lighting (17.00) Front Lights (17.01) ............................................. 17-1-2
Interior Lighting (17.02) ...................................... 17-2-1
Rear Lights (17.03) .............................................. 17-3-1
Lighting Mechanisms (17.04). .............................. 17-4-1

Issue 6, May 2010 Workshop Manual 1-1-1
Suspension (04.00)
Contents
Road Wheel Alignment (04.00) ............................. 4-0-2Specifications ......................................................... 0-2
Maintenance ........................................................... 0-2All Wheel Alignment .............................................. 0-2
Front Suspension (04.01)....................................... 4-1-1 Description ............................................................. 1-1Suspension Arms .................................................... 1-1
Anti-roll Bar ........................................................... 1-1
Vertical link............................................................ 1-1
Specifications.......................................................... 1-1
Symptoms ............................................................... 1-2
Maintenance ........................................................... 1-3 RH/LH Front Hub and Bearing Assembly
- Renew ................................................................. 1-3
RH/LH Lower Front Suspension Arm Assembly
- Renew ................................................................. 1-4
RH/LH Upper Front Suspension Arm Assembly
- Renew ................................................................. 1-4
Front Anti-Roll Bar - Renew ................................... 1-5
Front Pair Anti-Roll Bar Bushing - Renew................ 1-5
RH/LH Front Anti-Roll Bar Link - Renew ................ 1-5
RH/LH Front Hub Vertical Link - Renew ................ 1-6
Front Suspension Sensor Assembly-Renew ............. 1-7
Rear Suspension (04.02) ........................................ 4-2-1 Description ............................................................. 2-1Suspension Arms .................................................... 2-1
Anti-roll Bar ........................................................... 2-1
Vertical Link........................................................... 2-1
Specifications.......................................................... 2-2
Maintenance ........................................................... 2-2 RH/LH Rear Hub and Bearin g Assembly-Renew ..... 2-2
RH/LH Rear Lower Arm Assembly-Renew .............. 2-2
RH/LH Upper Rear Arm Assembly-Renew .............. 2-3
RH/LH Toe Control Rear Arm Assembly-Renew ..... 2-3
Rear Anti-Roll Bar-Renew ...................................... 2-3
Rear Pair-Anti-Roll Bar Bushing-Renew .................. 2-4
RH/LH Rear Anti-Roll Bar Link-Renew ................... 2-4
RH/LH Rear Hub Vertical Link-Renew.................... 2-4
Rear Suspension Sensor Assembly-Renew .............. 2-5
Shock Absorber System (04.03) ............................. 4-3-1 Description ............................................................. 3-1
Specifications.......................................................... 3-1
Maintenance ........................................................... 3-1Front Spring and Damper Assembly-Pair-Renew .... 3-1
Front Spring-Pair-Renew ........................................ 3-3
Front Damper-Pair-Renew ..................................... 3-4
Rear Spring and Damper Assembly-Pair-Renew...... 3-5
Rear Spring-Pair-Renew ......................................... 3-7
Rear Damper-Pair-Renew ...................................... 3-9
Road Wheels and Tyres (04.04)............................. 4-4-1 Specifications.......................................................... 4-1USA Tyre Gradings................................................. 4-2
Tread Wear ........................................................... 4-2
Traction ................................................................. 4-2 Temperature .......................................................... 4-2
Maintenance ........................................................... 4-3 Safety .................................................................... 4-3
Tyre Replacement and Wheel Interchanging ......... 4-3
Winter (Snow) tyres ................................................ 4-4 Recommended Winter Wheel and
Tyre Combination .................................................. 4-4
Inspection and Verification . ................................... 4-4
Tyre Wear ............................................................. 4-4
Tyre Damage ......................................................... 4-6
Repairs .................................................................. 4-7
Care of Alloy Road Wheels .................................... 4-7
Road Wheel Alignment .......................................... 4-7
Road Wheel and Tyre Balance ............................... 4-8
Torque Tightening of Road Wheel Nuts ................ 4-8
Tyre Pressure Sensing (Option).............................. 4-9 Pressure Sensing with Wint er Wheels and Tyres ..... 4-9
Warnings ............................................................... 4-9
Display Unit ........................................................ 4-10
System Programming ........................................... 4-10

Front Suspension (04.01)
Suspension (04.00)4-1-2 Workshop Manual November 2008
Symptoms
SymptomPossible CauseAction
Crabbing Front or rear suspension components/road
wheel alignment Inspect front and rear suspension systems.
Check / adjust road wheel alignment
Drive axle damaged New drive axle.
Front ‘Bottoming’
or Riding Low Spring(s)
Dampers Check ride height.
Check dampers.
Drift/Pull Unequal tyre pressure Check / adjust tyre pressures.
Inspect tyre for excessive wear.
Incorrect road wheel alignment Check / adjust road wheel alignment.
Tyres Check / adjust tyre pressu res. Inspect tyre for excessive
wear.
Unevenly loaded or overloaded vehicle Not ify customer of incorrect vehicle loading .
Damaged steering components Check steering sy stem for mechanical or hydraulic bias.
Brake drag Check brakes.
Check steering system for mechanical or hydraulic bias.
Rough Ride Spring(s) Check springs.
Shock absorber(s) Check shock absorbers.
Incorrect Tyre
Wear Incorrect tyre pressure Check and adju
st tyre pressure. Inspect tyre for
excessive wear.
Excessive front or rear Toe (rapid inner or
outer edge wear) Check and adjust road wheel alignment (Refer to ’Road
Wheel Alignment (04.00)’, page 4-0-2).
Excessive negative or positive camber
(rapid or outer edge wear) Check and adjust road wheel alignment (Refer to ’Road
Wheel Alignment (04.00)’, page 4-0-2).
Tyres out of balance (tyres cupped or
dished) Balance tyres.
‘Shimmy’ or ‘Road
Wheel Tramp’ Loose road wheel nut(s) Check and tighten road wheel nuts to specification.
Loose front suspension Check and tighten
suspension fixings to specification.
Front road wheel bearing(s) Check road wheel bearings.
Road wheel / tyres Check road wheels / tyres.
Shock absorber(s) Check shock absorbers.
Spring(s) Check springs.
Loose, worn or damaged ball -joint(s) Check ball-joint(s).
Loose, worn or damaged steering
components Check components.
Front road wheel alignment Check and adjust road wheel alignment (Refer to ’Road Wheel Alignment (04.00)’, page 4-0-2).
Worn or damaged suspension bushes Check suspension bushes
Poor ‘Return
ability’ of Steering ball-joints Check ball-joint(s).
Steering components Check for excessive friction in steering system.
Check tyre pressures
Steering Wheel
Off-Centre Unequal front or rear Toe settings Check and adjust road wheel alignment.
Steering components Check and install new components as required.
Sway or Roll Overloaded, unevenly or incorrectly
loaded vehicle Notify customer of incorrect vehicle loading
Loose road wheel nut(s) Check. Tighten road wheel nut(s) to specification
Spring(s) Check. Install new springs as required.
Shock absorber(s) Check. Install new shock absorbers as required.
Loose front stabilizer bar or rear stabilizer
bar Check. Tighten anti-roll bar to specification.

Front Suspension (04.01)
Suspension (04.00)
November 2008 Workshop Manual 4-1-3
Maintenance
RH/LH Front Hub and Bearing Assembly
- Renew
Removal
1. Raise vehicle on ramp.
2. Remove road wheel(s).
3. Release pad wear sensor harness clips (x2) from upper suspension arm.
4. Disconnect multiplug from wheel speed sensor.
5. Ease caliper pistons to release pads.
6. Remove caliper Allen bolts (x2), release caliper and tie
aside.
7. Remove retaining screws (x2) and disc.
8. Remove Torx securing wheel speed sensor to vertical link, remove sensor.
9. Remove Allen bolts (x4) securing hub bearing assembly to vertical link. 10. Release/remove hub bearing assembly from vertical link.
Installation
1. Clean hub bearing carrier and mating face on vertical
link.
2. Install hub bearing assembly, install and torque tighten Allen bolts (x4).
3. Clean wheel speed sensor.
4. Install wheel speed sensor, install and torque tighten Torx screw.
5. Clean disc.
6. Install disc, install and torque tighten retaining screws (x2).
7. Connect multiplug to wheel speed sensor.
8. Install caliper, install and to rque tighten Allen bolts (x2).
9. Install pad wear sensor harness clips (x2) in upper suspension arm.
10. Pump brake pedal.
11. Install road wheel(s).
12. Lower vehicle on ramp.
Vibration/Noise
Tyres/road wheel
Road wheel bearing assemblies
Brake components
Suspension components
Spring and damper units
Steering components Check. Install new components as required.
Vehicle Leans to
One Side Unevenly loaded or overloaded vehicle Notif
y customer of incorrect vehicle loading .
Front or rear suspension components Inspect front and rear suspension systems.
Spring and damper assemblies Check spring and damper assemblies.
Incorrect ride height. Lateral tilt out of
specification
Suspension bushes not torqued at ride
height Check ride height.
Check / adjust suspension bushes torque.
Wander Unevenly loaded or overloaded vehicle Notif y customer of incorrect vehicle loading .
ball-joint(s) Check ball-joint(s).
Front road wheel bearing(s) Check road wheel bearings.
Loose, worn or damaged suspension
components Check suspension components.
Loose suspension fasteners Check and tighten suspension fasteners to specification.
Steering components Check steering components for wear and / or free play.
Road wheel alignment (excessive total
front Toe-out) Check / adjust road wheel alignment

(Refer to ’Road Wheel Alignment (04.00)’, page 4-0-2).
SymptomPossible CauseAction
Caution
Be careful with the suspension components. The
suspension components can be damaged if hit, for example, with a metal faced hammer.
Repair Operation Time (ROT)

Road Wheels and Tyres (04.04)
Suspension (04.00)
May 2007 Workshop Manual 4-4-1
Suspension (04.00)
Road Wheels and Tyres (04.04)Specifications
Tyres
The tyres recommended by Aston Martin meet the high
speed performance of this vehi cle. Only tyres of identical
specification may be installed as replacements. Under no
circumstances must cross-ply tyres be installed.
Unique Aston Martin lightweight aluminium alloy road
wheels. The tyres are made exclusively for Aston Martin.
Standard
Wheels
• Front - 8.5J x 18
• Rear - 9.5J x 18
Tyres
• Front - Bridgestone 235/40 ZR 18 (94Y)
Rear - Bridgestone 275/35 ZR 18 (99Y)
Optional
Wheels
• Front - 8.5J x 19
• Rear - 9.5J x 19
Tyres
• Front - Bridgestone 235/40 ZR 19 (92Y)

Road Wheels and Tyres (04.04)
Suspension (04.00)4-4-2 Workshop Manual May 2007
USA Tyre Gradings
The following information relates to the tyre grading system
developed by the National Highway Traffic Safety
Administration which grades tyres by tread wear, traction
and temperature performance.
Tr e a d W e a r
Tread wear grade is a comparat ive rating based on the wear
rate of the tyre when tested under controlled conditions
(specified government test course). For example, a tyre
graded 150 would wear one and a half times less on the
government course than a tyre graded 100. Relative
performance of the tyres depends upon actual conditions of
use and may depart significantly from normal due to
variations in driving habits, service practices and differences
in road characteristics and climate.
Tr a c t i o n
Traction grades, A (highest), B and C represent a tyre’s ability
to stop in wet conditions measured on specified government
test surfaces of asphalt and concrete.
Te m p e r a t u r e
Temperature grades, A (highest), B and C, represent a tyre’s
resistance to the generation of wear and its ability to
dissipate heat when tested under controlled conditions
(specified indoor laboratory test road wheel). Sustained high
temperature can cause the material of a tyre to degenerate
and reduce tyre life; excessive temperatures can lead to
sudden tyre failure. Grade ‘C’ corresponds to a level of
performance which all passenger vehicle tyres must meet
under Federal Motor Vehicle Safety Standard No. 109.
Grades ‘B’ and ‘A’ represent higher levels of performance
than the minimum required by law. Aston Martin grade as follows:
Torque Figures
DescriptionNmlb/ft
Road wheel nuts:
Step 1 for all Wheel Nuts 80 60
Step 2 for 22 mm Wheel Nuts 135 100
Step 2 for Titanium Wheel Nuts 150 111
Step 2 for 21 mm Wheel Nuts 180 133
WAR NI NG
PDI INSPECTION.
TRACTION GRADE IS BASED ON BRAKING (STRAIGHT AHEAD) TRACTION TESTS AND DOES NOT INCLUDE
CORNERING (TURNING) TRACTION.
WAR NI NG
TEMPERATURE GRADE IS ESTABLISHED FOR A TYRE THAT IS PROPERLY INFLATED AND NOT
OVERLOADED. EXCESSIVE SPEED, UNDER INFLATION
OR EXCESSIVE LOADING, WHETHER SEPARATELY OR
IN COMBINATION, CAN CAUSE HEAT BUILD-UP AND POSSIBLE TYRE FAILURE.
Tyre Grade Level Achieved
Tread Wear 140 Traction A
Temperature A

Road Wheels and Tyres (04.04)
Suspension (04.00)
May 2007 Workshop Manual 4-4-3
Maintenance
Factory installed tyres and road wheels are designed to
operate satisfactory when inflated to the recommended
inflation pressures (Refer to ’Inspection and Verification’,
page 4-4-4). The recommended pressures apply to vehicle
loads up to and including the full-rated load capacity.
Correct tyre pressures and driving technique have an
important influence on tyre life. Heavy cornering,
excessively rapid acceleration and unnecessary sharp
braking increase tyre wear.
Replacement tyres should follow the recommended:
The use of any other size or type may seriously affect:
Wheels need to be renewed when:
Safety
Tyre Replacement and Wheel
Interchanging
When replacement of tyres is required it is preferable to
install a complete vehicle set. S hould either the front or rear
tyres only show excessive wear, new tyres must be installed
to replace worn ones. Under no circumstances interchange
tyres from side to side, front to re ar or vice versa as individual
tyre wear produces unique characteristics depending upon
their position. If the position is changed after wear has
occurred, the performance of the tyre will be adversely
affected.
New tyres must be balanced before installing to the vehicle.
•Size
•Speed rating
•Load range
• Radial construction type
•Safety
•Ride
•Handling
• Speedometer and Odometer calibration • Vehicle ground clearance
• Tyre clearance between
body and chassis
• Wheel bearing life
• Brake cooling
• Impact damaged
• Heavily corroded
• Porous • Wheel stud holes or seats
become damaged
• They have excessive radial or lateral runout.
ENSURE THAT TYRES ARE MOUNTED WITH THE
SIDEWALL MARKING ‘OUTSIDE’ SHOWING ON THE
OUTER SIDEWALL FACE.
CORRECT TYRE ROTATIONAL DIRECTION IS CRITICAL.
WA R N I N G
A TYRE AND WHEEL MUST ALWAYS BE CORRECTLY MATCHED. WIDER OR NARROWER TYRES THAN
RECOMMENDED COULD CAUSE DANGER THROUGH
SUDDEN DEFLATION.
WA R N I N G
WHEN CHANGING A WHEEL, MAKE SURE THAT THE VEHICLE CANNOT MOVE. ALWAYS APPLY THE
PARKING BRAKE AND SELE CT THE TRANSMISSION
PARK POSITION (AUTOMATIC TRANSMISSION ONLY).
WA R N I N G
NEVER RUN THE ENGINE WITH ONE WHEEL OFF THE GROUND, FOR EXAMPLE, WHEN CHANGING THE
WHEEL. THE WHEEL RESTING ON THE GROUND MAY CAUSE THE VEHICLE TO MOVE.
WA R N I N G
ALWAYS TIGHTEN THE WHEEL NUTS TO
SPECIFICATION. TOO TIGHT MAY CAUSE DAMAGE,
TOO LOOSE MAY ALLOW TH E WHEEL TO BECOME
DETACHED.
WAR NI NG
DO NOT MIX DIFFERENT TY PES OF TYRES ON THE
SAME VEHICLE. HANDLING MAY BE SERIOUSLY AFFECTED RESULTING IN LOSS OF CONTROL.
WAR NI NG
USE ONLY WHEELS AND WHEEL NUTS SUPPLIED BY
ASTON MARTIN. AFTER MARKET WHEELS OR WHEEL
NUTS MAY NOT INSTALL OR FUNCTION CORRECTLY
AND COULD CAUSE INJURY OR DAMAGE.
Caution
When a new tyre is installe d, always renew the tyre
valve.

Road Wheels and Tyres (04.04)
Suspension (04.00)4-4-4 Workshop Manual May 2007
Winter (Snow) tyres
Winter tyres must only be installed in complete four-wheel
sets of the same type. The maximum speed with winter tyres
installed (without snow chains) is 210 km/h (131 mile/h) for
H rated tyres or 240 km/h (149 mile/h) for V rated tyres.
When using snow chains, note that:
• Snow chains must only be installed to the rear wheels
• Only Aston Martin snow chains should be used
• Snow chains must not be used on roads which are clear of snow
• The maximum speed with winter tyres and snow chains fitted is 48 km/h (30 mile/h)
• Traction control must be switched Off when using snow chains
Recommended Winter Wheel and Tyre
Combination
Unique Aston Martin lightweight aluminium alloy road
wheels.
Wheels
• Front - 8.5J x 18
• Rear - 9.5J x 18
Tyres
Pirelli 240 Snowsport
• Front - 225/45 R18 (95V)

Road Wheels and Tyres (04.04)
Suspension (04.00)
May 2007 Workshop Manual 4-4-5
Road Test
A tyre vibration diagnostic proc edure always begins with a road test. The road test and customer interview (if available)
will provide much of the information neede d to find the source of a vibration.
During the road test, drive the vehicle on a road that is smoot h and free of undulations. If vibration is apparent, note and
record the following:
• The speed at which the vibration occurs
• What type of vibration occurs in each speed range
• How the vibration is affected by changes in the following types of vibration-sensitivity:
Torque Sensitive - This means that the condition may be improved or made worse by accelerating, decelerating, coasting,
maintaining a steady vehicle speed or applying engine torque.
Vehicle Speed Sensitive - This means that the vibration always occurs at the same vehicle speed and is not affected by
engine torque, engine speed or the transmission gear selected.
Engine Speed Sensitive - This means that the vibration occurs at varyin g vehicle speeds when a different transmission
gear is selected. It may sometimes be isolated by increasing or decreasing engine speed with the transmission in NEUTRAL
or by stall testing with the transmission in gear. If the condition is engine speed sensitive, the cause is probably not relate d
to the tyres.
If the road test indicates that there is tyre whine, but no sh ake or vibration, the noise originates with the contact between
the tyre and the road surface.
A thumping noise usually means that the tyre has a flat or soft spot making a noise as they slap the roadway. Tyre whine
may be distinguished from axle noise. Tyre whine remains the same over a range of speeds.
Symptoms
SymptomPossible Source(s):Action(s)
Tyres show excess wear on
edge of treads Tyres under-inflated Correct pressure to specification.
Vehicle overloaded Correct as required.
Tyres show excess wear on
edge of treads (having the
correct tyre pressures) Incorrect toe setting Set to specification.
Tyres show excess wear in
center of tread Tyres over-inflated Correct pressure to specification.
Other excessive tyre wear
problems Incorrect tyre pressure Correct pressure to specification.
Incorrect tyre and wheel usage Install correct tyre and wheel combination.
Geometry out of alignm
ent Check and adjust.
Loose, worn or damaged suspension
components Inspect, repair or install new suspension
components as necessary.
Wheel and tyre assembly out of
balance Balance wheel and tyre assembly.
Excessive lateral or radial runout of
wheel or tyre Check, repair or install a new wheel or tyre as
necessary.
Wheel mounting is difficult Incorrect application or mismatched
parts, including wheel studs and wheel
nuts. Corroded, worn or damaged parts Clean or install new parts.
Wobble or shimmy affecting
wheel runout Damaged wheel (eventually damaging
wheel bearings and causing uneven
tyre wear) Inspect wheel rims for damage and runout.
Install a new wheel rim as necessary.
Excessive vibration, rough
steering or severe tyre wear Loose or incorrect attaching parts Tighten or install new parts.

Road Wheels and Tyres (04.04)
Suspension (04.00)4-4-6 Workshop Manual May 2007
Ty r e D a m a g e
Vehicle vibrations Tyres and wheels mismatched Install correct tyre and wheel combination.
Inflation pressure too high or too lo w Correct pressure to specification
Uneven tyre wear Refer to Diagnosis and Testing .
Out-of-balance wheel, tyre, wheel hub
or disc assembly Determine the out-of-balance component and
balance or install a new part.
Damaged or distorted wheel from road
impact hazard or incorrect handling Install a new wheel.
Excessive radial runout Install a new wheel or tyre. Check for incorrect wheel and tyre specifications.
Excessive lateral runout Install a new wheel or tyre.
Incorrectly seated tyre Remount the tyre.
Loose wheel mountings - damaged
wheel studs, wheel nuts, worn or
broken wheel hub face or foreign
material on mounting faces Tighten or install new parts. Clean mounting
surfaces.
Defective wheel bearings Install a new bearing set.
Brake disc imbalance
Water in tyres Remove water.
Loose engine or transmission mounts Install new mount nuts / install new mounts.
Incorrect front end alignment Align front end.
Loose or worn driveline or suspension
parts Repair or install new parts.
Excessive driveshaft runout or
imbalance Install a new driveshaft.
Worn or damaged flexible drive joint Install a new driveshaft.
Damaged wheel hub stud
threads Sliding wheel across the wheel studs
during installation. Loose wheel nuts
Install new wheel studs.
Broken wheel studs Loose or over tightened wheel nuts Install new wheel studs.
Corrosion and contamination
streaks from the wheel hub
wheel stud holes Loose wheel nuts Check complete assembly. Install new parts.
Damaged wheel nuts Loose wheel assembly Install new wheel nuts.
Over-tightened wheel nuts Install new wheel nuts.
Frozen wheel nuts Corrosion or galling If corrosion is light, wire brush away corrosion.
If corrosion is excessive install new wheel studs
and wheel nuts.
SymptomPossible Source(s):Action(s)
SymptomDescription
Age Deterioration Cracking and crazing of the tread and side wall rubber, sometimes accompanied by carcass
deformation. An indication that the tyres have been in service for a very long time.
Neglected Cut Damage through accidental cuts or penetrations will extend in use due to continued flexing and /
or ingress of moisture and road matter.
Impact Fracture Resultant damage from impact fractures is not always visible externally and, therefore, as a safety
precaution the tyre should be removed and examined.
Casing fracture caused by severe localized impact through driving over kerbs, hitting potholes
and / or objects in the road.
A double fracture caused by crushing the side wall of the tyre between an object and the rim
flange.
In both instances, such damage can lead to sudd en and dangerous tyre deflation some time after
the impact occurred.