1997 AUDI A4 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.
Pa
ge 49 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

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.
Pa
ge 50 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

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).
Pa
ge 51 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

52

Brake system - visual inspection


WARNING!

Any defects found must be repaired.

- Inspect brake master cylinder, vacuum brake
booster, hydraulic unit, brake pressure regulator,
and brake calipers for leaks and damage.

- Brake hoses must not be twisted.

- Brake hoses must not make contact with any
part of vehicle when steering is at full lock.

- Inspect brake hoses for porosity and
deterioration, brake hoses and brake lines for
chafing.

- Inspect the brake connections and attachments
for correct seating, leaks and corrosion.
Pa
ge 52 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

53

Brake fluid level, checking


WARNING!

Use only new brake fluid confomning to US
Standard FMVSS 116 DOT 4. Genuine VW,
Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Do not ingest brake
fluid. Wash thoroughly with soap and water if
brake fluid comes into contact with the skin.

CAUTION!
Do not let brake fluid come into contact with
paint because of its caustic effect
Brake fluid absorbs moisture from
surrounding air and should always be stored
in airtight containers.

Delivery inspection:
Brake fluid level must be at max. marking at time
of delivery.

Note:
To avoid brake fluid over flowing do not exceed
the max. marking.
Pa
ge 53 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

54

Inspection service:

- Always consider brake pad wear when checking
brake fluid level. When driving, a slight drop in
brake fluid level results from normal wear and
automatic adjustment of brake pads.

- If brake fluid level is at minimum marking or
slightly above, brake pads are close to wear
limit, it is not necessary to add fluid.

- If brake pads are new or well away from wear
limit, brake fluid level must be between min. and
max. markings.

- If brake fluid level has dropped below min.
marking, check brake system before adding
brake fluid.
Pa
ge 54 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

55

Brake fluid, changing


WARNING!

Use only new brake fluid conforming to US
Standard FMVSS 116 DOT 4. Genuine VW,
Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Do not ingest brake
fluid. Wash thoroughly with soap and water if
brake fluid comes into contact with the skin.

CAUTION!
Do not let brake fluid come into contact with
paint because of its caustic effect
Brake fluid absorbs moisture from
surrounding air and should a/ways be stored
in airtight containers.
Do not allow brake fluid to come into contact
with fluids containing mineral oils or
gasoline cleaning products.
Mineral oils damage plugs and seals of the
brake system.
Pa
ge 55 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6

56


CAUTION!
Note:
Please observe waste disposal requirements. - Connect Brake Bleeder US 1116 to brake fluid reservoir. Use adapter -
1-, plastic fitting VAG 1238 B/2, seal -3-, and connector -4-.
- Use a suction bottle to draw off as much brake fluid as possible.
Do not use cleaning cloths that have been contaminated by
mineral oils for cleaning brake filling and bleeder fittings. Do not re-use extracted brake fluid.
- Install and adjust brake pedal depressor between driver's seat and
brake pedal.
- Open bleeder fittings and pump in fresh fluid forcing out appropriate
amount of used brake fluid.
Pa
ge 56 of 111 Descri
ption of wor
k
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.ME01.01.6