wheel bolt torque AUDI S6 2009 Owners Manual

Tires and wheels -_______________________ ..::...:..:..-=::.......:.:..;::..:....____;___
•
Wheel bolts
Wheel bolts must always be tightened to the correct
torque.
The design of wheel bolts is matched to the factory installed rims. If
different rims are fitted, the correct wheel bolts with the right length
and correctly shaped bolt heads must be used. This ensures that
wheels are fitted securely and that the brake system functions
correctly.
In certain circumstances, you may not use wheel bolts from a
different vehicle - even if it is the same model~
page 374.
& WARNING
Improperly tightened or maintained wheel bolts can become loose
causing loss of control, a collision and serious personal injury.
• Always keep the wheel bolts and the threads in the wheel hubs
clean so the wheel bolts can turn easily and be properly tightened.
• Never grease or oil the wheel bolts and the threads in the wheel
hubs. They can become loose while driving if greased or oiled,
even if tightened to the specified torque.
• Only use wheel bolts that belong to the rim being installed.
• Never use different wheels bolts on your vehicle.
• Always maintain the correct tightening torque for the wheel
bolts to reduce the risk of a wheel loss.
If the tightening torque of
the wheel bolts is too low, they can loosen and come out when the
vehicle is moving. If the tightening torque is too high, the wheel bolts and threads can be damaged and the wheel can become
loose.
0 Note
The specified torque for the wheel bolts is 90 ft lb (120 Nm) with a
tolerance of ± 7,4 ft lb(± 10 Nm). Torque wheel bolts diagonally.
After changing a wheel, the torque must be checked as soon as possible with a torque wrench
-preferably by an authorized Audi
dealer or qualified workshop. •
Low aspect ratio tires
Your Audi is factory-equipped with low aspect ratio tires. These tires
have been thoroughly tested and been selected specifically for your
model for their superb performance, road feel and handling under
a variety of driving conditions. Ask your authorized Audi dealer for
more details.
The low aspect ratio of these tires is indicated by a numeral of 55 or
less in the tire's size designation. The numeral represents the ratio
of the tire's sidewall height in relation to its tread width expressed
in percentage. Conventional tires have a height/width ratio of 60 or
more.
The performance of low-aspect-ratio tires is particularly sensitive to improper inflation pressure. It is therefore important that low
aspect ratio tires are inflated to the specified pressure and that the
inflation pressure is regularly checked and maintained. Tire pres­
sures should be checked at least once a month and always before a
long trip~
page 323, "Checking tire pressure" .
What you can do to avoid tire and rim damage Low aspect ratio tires can be damaged more easily by impact with
potholes, curbs, gullies or ridges on the road, particularly if the tire
is underinflated.
In order to minimize the occurrence of impact damage to the tires
of your vehicle, we recommend that you observe the following
precautions:
• Always maintain recommended inflation pressures . Check your
tire pressure every 2,000 miles (3,000 km) and add air if necessary.
• Drive carefully on roads with potholes, deep gullies or ridges.
The impact from driving through or over such obstacles can
damage your tires. Impact with a curb may also cause damage to
your tires. ..,
Vehicle care
I t •

_______________________________________________ W_ h_ a_t _ d_ o_ l _d _o_ n_ o _ w_ ? __ IIII
•
& WARNING (continued)
front wheel is lifted off the ground, placing the Automatic Trans­
mission in "P" {Park) will
not prevent the vehicle from moving.
• Before you change a wheel , be sure the ground is level and firm.
If necessary, use a sturdy board under the jack.
• After installing the spare wheel, make sure that you replace the
flat tire/wheel in its storage area properly and tighten the knurled
retaining screw securely. •
Changing a vvheel
When you change a wheel, follow the sequence described
below step-by-step and in exactly that order.
1. Act ivate the vehicle jack mode (only vehicles with Adap ­
tive Air Suspension) ~
page 186.
2. Remove the decorative wheel cover*. For more details
see also ~
page 346, "Decorative wheel covers".
3. Loosen the
wheel bolts ~ page 346.
4. Locate the proper mounting point for the jack and align
the jack below that point~
page 347.
5. Lift the car with the jack~ page 347.
6. Remove the wheel with the flat tire and then install the
spare
~ page 348.
7. Tighten all wheel bolts lightly.
8.
Lower the vehicle with the jack.
9. Use the wheel bolt wrench and
firmly tighten all wheel
bolts
~ page 346.
10. Replace the decorative wheel cover*.
11. Deactivate the veh icle jack mode (only vehicles with
Adaptive Air Suspension)~
page 186.
& WARNING
Always read and follow all WARNINGS and information => & in
"Raising the vehicle" on
page 347 and => page 349. •
After changing a vvheel
A wheel change is not complete without the doing the
following.
- Store and secure the wheel you replaced in the spare
wheel well.
- Replace the tools and the jack in their proper location.
-Check the tire pressure on the spare wheel immediately
after mounting it.
- As soon as possible, have the
tightening torques on all
wheel bolts checked with a torque wrench. The correct
tightening torque is 90 ft lb (120 Nm).
- Have the flat tire
replaced as soon as possible.
[ i] Tips
• If you notice that the wheel bolts are corroded and difficult to
turn while changing a tire, they should be replaced before you check
the tightening torque.
• Drive at reduced speed until you have the tightening torques
checked. a
Do-it-yourself service

11111.___W_ h_ a _ t_d_ o_ l _d _o_ n_ o_ w_ ? ______________________________________________ _
• Have the wheel bolt tightening torque checked with a torque
wrench as soon a s possible by your authorized Audi dealer or a
qualified service station .
• With steel and alloy wheel rims , the wheel bolts are correctly
tightened at a torque of 90
ft lb (1 20 Nm ).
• If you notice that the wheel bolts are corroded and difficult to
turn while changing a tire , they should be repla ced before you check
the tightening torque .
• Replace the flat tire with a new one and have it installed on your
vehicle as soon as possible . Remount the wheel cover.
Until then , drive with extra care and at redu ced speeds .
& WARNING
• If you are going to equip your vehicle with tires or rims which
differ from those which were factory installed , then be sure to read
the information
=> page 329 , "New tires and replacing tires and
wheels" .
• Always make sure the damaged wheel or even a flat tire and
the jack and tool kit are properly secured in the luggage compart ­
ment and are not loose in the passenger compartment .
• In an accident or sudden maneuver they could fly forward ,
injur ing anyone in the vehicle .
• Always store damaged wheel , jack and tools securely in the
lugg age compartment . Otherwise , in an accident or sudden
maneuver they could fly forward, cau sing injury to passengers in
the vehi cle .
0 Note
Do not use commercially available ti re sealants . Otherwise, the elec ­
t rical components of the tire pressu re monitor ing sys tem* will no
longer work properly and the sensor for the tire pressure moni ­
to ring system wi ll hav e to be r eplace d by a qua lifi ed wo rkshop. •