AUDI A4 1998 B5 / 1.G Engine Oil Level Checking Owner's Manual

27

V-belt and ribbed belts, replacing (4-
cylinder engine AEB)


Lock carrier must be in service position Page 24


Removing

Vehicles with air conditioner

- Remove noise insulation Page 18
.

All models - Loosen securing bolts of tensioning roller for ribbed belt for A/C
compressor (arrows).
- Loosen ribbed belt and remove.

- To loosen ribbed belt, turn tensioning element in direction of arrow.
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Note:

The tensioning element for the ribbed belt can be locked in position by
inserting a suitable hex key (arrow) or mandrel 3204 into the securing
hole.
- Remove ribbed belt and release tensioning element.
- Secure belt pulley for viscous fan with an M5 x 60 bolt and unscrew
using an 8 mm hex key.

- Remove viscous fan.
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Installing
Installation is in the reverse order of removal. Also, note the following: - Remove V-belt pulley from coolant pump. Counterhold by inserting pin
(arrow) in pump pulley.
- Remove V-belt.
- Install V-belt on pulleys and assemble two sections of pulley on coolant
pump without tightening bolts.
- Tighten bolts securing two sections of pulley in stages while turning
coolant pump.
As bolts are tightened, V-belt should gradually move outward until
seated on running surface.
- Tighten bolts to 25 Nm.
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Note:
It is not possible to adjust the tension of the V-
belt for the coolant pump.

- Tighten viscous fan mounting to 45 Nm.

- Install ribbed belt over crankshaft pulley, viscous
fan pulley and power steering pump pulley. If
necessary, pull belt upward using a suitable tool.

Vehicles with air conditioner - Turn ribbed belt tensioning element in direction of arrow.
- Install ribbed belt over Generator pulley last. Release tensioning
element.
- Check that ribbed belt is properly seated.

Routing of ribbed belt Page 32

- Install ribbed belt for A/C compressor.

Routing of ribbed belt Page 32
- Apply torque wrench to hex on tensioning roller and tension with a
torque of 25 Nm
- Tighten bolts -A- to 20 Nm
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All models

- Start engine and check belt running.

- Check again to ensure that bolts for coolant
pump pulley are tightened to correct torque.
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Routing of V-belt and ribbed belts
1 -
Tensioning element for ribbed belt
2 -
Generator
3 -
Viscous coupling
4 -
Coolant pump
5 -
Power steering pump
6 -
V-belt
For coolant pump
7 -
Ribbed belt For Generator, power steering pump and
viscous fan
8 -
Vibration damper
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9 -
Tensioning element for ribbed belt
For A/C compressor
10 -
Ribbed belt For A/C compressor
11 -
A/C compressor
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Poly-ribbed belt, checking, removing,
and replacing

Check condition of Poly-ribbed belt for:

Splits in base material (cracks, core
fractures, cross section fractures).
Separation of layers (top layer, tensile
cords).
Bursting on base material.
Fraying of cords.
Flank wear (material flaking, frayed flanks,
hardening of flanks (glassy surface), and
surface cracks).
Traces of oil and grease.

Note:
If defects exist, replace Poly-ribbed belt.
Poly-ribbed belt replacement interval

- Every 144,000 km (90,000 mi.)
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Removing

- Move body, front, to engine service position
Page 24
.

- Remove ribbed V-belt cover.
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The Poly-ribbed belt is removed by rotating tensioner in a clockwise
direction with a 17mm wrench or socket. Hold tensioner in place during
belt removal with Drift 3204.
Note:
When removing it is important to mark the running direction of belt.
Changing the belt running direction could lead to excess wear.
Installing - Remove Poly-ribbed belt.
- Install Poly-ribbed belt over drive pulley, guide pulley, and tensioning
pulley in that order.
- Remove Drift 3204.
- Install ribbed V-belt cover.

Routing of Poly-ribbed belt -D2-.
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