wheel bolts AUDI A4 1997 B5 / 1.G Engine Oil Level Checking Workshop Manual

49

Wheel bolts, tightening to specified
torque


Trim cap

Puller -A- for removing the trim cap is in the vehicle tool kit.
Wheel bolts
The adapter for loosening and tightening the anti-theft wheel bolts is in the
vehicle tool kit.
Note:
Ensure that the wheel bolts are tightened diagonally and alternately to the
following tightening torque:
Tightening torque: 120 Nm (89 ft lb)
Correct installation of wheels
When installing the wheels, note the following points to ensure that the
wheels remain secure at all times: - After completing work, replace adapter in vehicle tool kit.
Always tighten the wheel bolts to the specified torque; excessive
torque can distort the wheel bolt seats in the rim.
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50

When installing a wheel, do not torque down
the first wheel bolt immediately (for instance,
with an impact wrench). This would prevent the
other bolts from centering the wheel properly
when they are threaded in; the rim could then
come loose, even though the bolts have been
tightened to the specified torque.
Before installing the wheels, examine the seats
of the wheel bolts and the contact surfaces
between the rims and the hubs for rust and
corrosion. Clean off these parts if necesary,
otherwise this can affect the clamping force of
the bolts after installation, and the rims can
come loose.

WARNING!
If the points listed above are not observed,
the wheel mountings can come loose and the
wheel bolt seats can become distorted.
This distortion may be very slight and not
visible to the naked eye.
Even this slight distortion of the wheel bolt
seats can prevent the rims from being held
firmly and the wheels will come loose
repeatedly.
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51

Brake pad thickness, checking


Inspection service:

Dimension -a- = pad thickness including backing plate. Wear limit = 7 mm
(0.28 in.).
Thoroughly remove all dirt from wheels.
If pad thickness including backing plate is 7 mm (0.28 in.) or less the
brake pads have reached or exceeded wear limit and must be replaced. - Determine thickness of outer and inner pads by inspecting visually.
View through opening in wheel. Use a flashlight and mirror if necessary.
- Tighten wheel bolts to 110 Nm (81 ft lb).
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