Visual status check
1. Remove the engine top cover, refer to Section Removal and installation of the upper engine cover / lower protection of the engine compartment / subframe.
2. Remove the top cover of a gear belt, address to the Section Removing and installing timing belt.
3. Check the toothed belt for the following damage:
- Cracks, transverse tears.
- Bundles (toothed belt housing, tensioning branch).
- Chips on the toothed belt housing.
- Looseness of the tension branch.
- Surface cliffs (shell of plastic)
- Traces of oil and grease.
Damaged belt must be replaced immediately (service station work).
Checking the tension of the injection pump drive belt
Warning: The tension of the timing belt for the camshaft drive does not need to be checked as part of the maintenance, as the belt is tensioned by the roller automatically.
1. Check if the labels match (1) And (2) on the tension roller. If the marks do not match, tighten the toothed belt.
Toothed belt tension
1. Loosen the tensioner roller nut with a ring wrench or socket, for example, AUDI-3078 (1). In this case, the tension roller must be kept from turning with a socket wrench.
2. Turn the tension roller with a socket wrench (2) counterclock-wise (in the direction of the arrow in the illustration) so that the pointer (3) on the tension roller was opposite the mark (4). In this position, tighten the tension roller mounting nut with a ring wrench or head to 36Nm.
3. Reinstall the top cover of the toothed belt, refer to Section Removing and installing timing belt.
4. Install the engine top cover, refer to Section Removal and installation of the upper engine cover / lower protection of the engine compartment / subframe.
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