Table of contents: Removal ↓ Installation ↓
The poly V-belt drives the generator, power steering pump, radiator fan, air conditioning compressor and water pump, depending on the engine modification.
Removal
Warnings: Before removing, mark the direction of rotation of the poly V-belt with chalk, marker or paint. If a used poly V-belt is installed and rotated in the wrong direction, it will cause damage to the belt. Make sure the poly V-belt is correctly positioned on the pulleys.
Do not open the refrigerant circuit of the air conditioning system.
Fig. 3.4–24. Units driven by a poly V-belt: 1 – poly V-belt; 2 – casing; 3 – bolt, 22 Nm; 4 – bolt, 45 Nm; 5 – bolt, 45 Nm; 6 – generator; 7 – poly V-belt tensioning mechanism; 8 – bolt, 22 Nm; 9 – vibration damper with poly V-belt pulley; 10 – bolt, 22 Nm; 11 – nut, 22 Nm; 12 – centering bushings; 13 – Air conditioning compressor and power steering pump bracket; 14 – bolt, 40 Nm; 15 – bolt, 22 Nm; 16 – Power steering pump; 17 – adjusting gasket; 18 – centering sleeve; 19 – Power steering pump pulley; 20 – bolt, 22 Nm; 21 – air conditioning compressor; 22 – poly V-belt guide roller; 23 – bolt, 22 Nm; 24 – guide roller cover
Adjusting shims 17 (Fig. 3.4–24) come in different thicknesses and are used to adjust the alignment of the pulley and poly V-belt.
Remove the front engine compartment cross member.
Fig. 3.4–4. Loosening the tension of the poly V-belt
Loosen the tension of the poly V-belt by turning the tensioning mechanism clockwise with a key (see Fig. 3.4–4).
Fig. 3.4–25. Using a hex key to lock the poly V-belt tensioner in the loose position
To fix the V-belt tensioning mechanism in the loose position, insert the Allen key into the fixing channels (Fig. 3.4–25).
Remove the poly V-belt and release the poly V-belt tensioner mechanism.
Installation
Installation is carried out in the reverse order of removal, taking into account the following.
Install the poly V-belt first on the crankshaft pulley, then on the idler pulleys and lastly on the tension roller pulley.
Start the engine and check that the poly V-belt is working properly.
Install the front cross member.
Fig. 3.4–26. Location of the poly V-belt on the pulleys of a diesel engine
(The original text is available on the website: AudiManual)