Table of contents: V-belt for water pump and power… ↓ Air conditioning compressor drive… ↓
1. Turn the engine and at the same time carefully inspect the belt. Often there may be one fairly deep crack on the belt adjacent to the pulley.
If there are cracks or fraying on the edges, the belt should be replaced.
Too tight a belt tension leads to its stretching and destruction of the base, as well as increased load on the bearings of the drive units. Too weak tension causes the belt to slip on the pulley, its strong heating and premature wear.
When pressing hard with your thumb on the belt in the section between the pulleys, the amount of belt deflection should correspond to the data in the table.
After installing a new belt, it is necessary to check its tension after a run of 100 km and, if necessary, tighten it.
Caution! When checking the tension of the V-belt on vehicles with four-cylinder engines produced since 10/91, the belt must be loosened and re-tensioned.
The tension of the V-belt of the generator of cars with six-cylinder and diesel engines is performed automatically and therefore does not require adjustment.
V-belt for water pump and power steering pump
Cars with four-cylinder engines
2. Remove the engine splash guard.
3. Loosen the clamp bolt on the power steering pump tensioner bar.
4. Turn the adjusting slotted nut until the belt is properly tensioned (see illustration).
5. Tighten the clamp bolt.
If the power steering pump does not move, then it is necessary to loosen the generator mounting bolt on the bracket.
Air conditioning compressor drive V-belt
Cars with four-cylinder engines
The tension of the air conditioning compressor V-belt is adjusted by removing or installing spacer washers between the front and rear of the V-belt pulley (see illustration 4.0).
A larger number of spacer discs between the pulley halves leads to a reduction in belt tension. Fewer spacer discs between the pulley halves leads to increased belt tension (see illustration 4.0a).
Additional spacer washers are installed between the pulley hub and its front part.
The pulley mounting nuts are tightened to a torque of 25 Nm. Make sure that the belt is not jammed between the pulley halves.
6. Turn the crankshaft 2 times.
7. Check the belt tension by pressing firmly with your thumb on the belt at the section between the crankshaft and the air conditioning compressor.
8. Start the engine and let it run for a while.
9. Check the belt tension and add or remove spacers if necessary.
When the belt tension is correct, tighten the assembly pulley mounting bolts again to a torque of 25 Nm (see illustrations 4.0b and 4.0c).
V-belt for power steering
Cars with five-cylinder engines
10. Unscrew the fastening nuts on the tension bar and on the pivot bracket.
11. Turn the adjusting bolt to the left side (unscrew) to tension the belt.
12. Tighten the mounting nuts.
Air conditioning compressor drive V-belt
Cars with five-cylinder engines
13. Remove the clamp bolts on the left and right sides of the air conditioning compressor bracket.
14. Turn the air conditioner compressor bracket together with the compressor to the right. Use a pry bar if necessary. When the belt tension is correct, tighten the clamp bolts.
[Content source: the specified website: AudiManual]