wheel torque PORSCHE BOXSTER 2006 2.G Owners Manual

230
Practical Tips, Emergency Service
Wheel alignment, wheel balancing As a precaution, have wheels with summer tires
balanced in the spring, and those with mud and
snow tires before winter.
Unbalanced wheels may affect car handling and
tire life.
Only the specified weights may be used for wheel
balancing.
Self-adhesive weights must not come into contact
with cleaning agents, since they could drop off.
Uneven tread wear indicates wheel imbalance. In
this event, the vehicle should be checked at an au-
thorized Porsche dealer.
Warning!
If, during a journey, uneven running or vibra-
tions occur that could be caused by damage
to tires or the car, the speed must be re-
duced immediately, but without braking
sharply.
If you continue your trip without having the
cause of the fault remedied, you might lose
control of your vehicle which could cause se-
vere personal injury.
fStop the vehicle and check the tires.
fIf no cause for the fault can be found, drive
carefully to the nearest authorized Porsche dealer.
Removing and storing tires fAfter changing, adjust tire pressure and torque
wheel bolts diagonally to 94 ftlb (130 Nm).
Tires must always remain on the same side of
the vehicle.
When wheels are removed, the direction of
rotation and position of each wheel should be
marked.
Example
FR (front right), FL, RR and RL.
Wheels must always be fitted in accordance with
their marking.
The preception that tire durability and perform-
ance are immune to the effects of storage and
age is unfounded.
Chemical additives, which make the rubber elas-
tic, lose their effectiveness in the course of time
and the rubber becomes brittle and cracks.
Therefore, the tires should be inspected from
time to time. Note
Under no circumstances should tires older than 6
years be used on your Porsche.
The age of the tire can be obtained from the “DOT”
code number. If, for example, the last four num-
bers read 1204, then the tire was produced in the
12th week of 2004.
fStore tires in a cool and dry place.

Practical Tips, Emergency Service
241
Wheel Bolts
Warning!
Risk of wheel bolt breakage and wheel sepa-
ration, resulting in severe personal injury or
death.
fFollow all instructions concerning wheel bolts. fAlways clean the wheel bolts before fitting.
fApply a thin coat of Optimoly TA (aluminium
paste) on the thread and between the bolt head
and movable spherical cap ring (arrows).
The bearing surface of the spherical cap
facing the wheel must not be greased.
fReplace damaged wheel bolts.
Only use the Original Porsche wheel bolts
specially designed for this vehicle type.
Tightening torque Tightening torque of wheel bolts:
130 Nm/96 ftlb. Wheel Securing Bolts The wrench socket for the wheel securing bolts is
in the tool box.
To loosen or tighten the wheel bolt with anti-theft
protection, a wrench socket with the appropriate
coding must be used between the wheel bolt and
the wheel-bolt spanner.
fWhen positioning the wrench socket, ensure
that it engages fully in the teeth of the wheel
bolt.
If the wheels have to be removed at the workshop,
please do not forget to hand over the wrench
socket for the wheel securing bolts along with the
car key.
Checking tire pressure with a
pressure gaugefPlease observe the chapter “TPC TIRE PRES-
SURE MONITORING” on Page 103.
1. Remove the valve stem cap from the tire.
2. Press the pressure gauge onto the valve stem.
Note on operation
fDo not press too hard or force the valve stem
sideways, or air will escape.
If the sound of air escaping from the tire is
heard, reposition the pressure gauge.
3. Read the tire pressure on the gauge stem and
compare it to the permissble tire pressure.
This information can be found on the tire pres-
sure plate or in the chapter Technical Data.
Please observe the chapter “TIRE PRESSURE
FOR COLD TIRES” on Page 284.
4. Remove the pressure gauge.

Practical Tips, Emergency Service
243
6. Take the wheel off and put a new wheel on.
7. Please observe the chapter “WHEEL BOLTS”
on Page 241.
Screw in wheel bolts; remove assembly aids
and screw in the remaining wheel bolts. Initially
tighten bolts in diagonally opposite sequence
so that the wheel is centered.
8. Lower the car completely.
9. Tighten wheel bolts in diagonally opposite
sequence.
Immediately after changing a wheel, use a
torque wrench to check the prescribed
tightening torque (130 Nm/96 ftlb.).

244
Practical Tips, Emergency Service
SpacersfUse the spacers only together with wheels and
fastening parts approved by Porsche.
Before having spacers fitted, find out about the
current authorisation status.
Mounting an emergency spare wheel
If 5 mm spacers are fitted, these must not be
removed to mount an emergency spare wheel.
Fitting snow chains
The use of snow chains is not permitted when
5 mm spacers are mounted.
Caution!
Risk of damage to wheel housings if the
5 mm spacers are not removed before fitting
snow chains.
fIn order to enable the fitting of snow chains,
have the 5 mm spacers removed on all 4wheels.Note on operation
fTo fit/remove the spacers:
Please consult an authorized Porsche dealer.
Removing the spacersfPlease observe the chapter “CHANGING A
WHEEL” on Page 242.
1. Unscrew both countersunk screws (M6x16) on
the wheel hub.
2. Remove the spacer.
3. Fasten the brake disc with the short M6x12
countersunk screws, part No.
900.269.047.09.
Tightening torque 10 Nm (7.5 ftlb.).
4. For wheel mounting without a spacer, 5 mm
shorter wheel bolts (part No:
996.361.203.02) must be used.
Tightening torque 130 Nm (96 ftlb.).Required scope of parts if the spacers are
removed
Short countersunk screws (M6x12)
Part No: 900.269.047.09
1 set of short wheel bolts
Part No: 996.361.203.02
Short anti-theft protection devices
Part No: 996.361.057.01

Practical Tips, Emergency Service
245
Long wheel bolt
X - bolt length approx. 50 mm
Arrows - marksWheel bolt identifying features
The long wheel bolts are identified on the face
surface of the bolt head with GT or in red, or the
moveable spherical cap ring is galvanised in red.
The long wheel bolts must only be used together
with 5 mm spacers fitted.The short wheel bolts are not marked in colour.
The short wheel bolts must only be used without
5 mm spacers fitted.
Tightening torque for both wheel bolts:
130 Nm (96 ftlb.).