Note: Replacement of the multi-ribbed accessory drive belt is described in Chapter 2. The toothed belt is used only to drive the fuel injection pump (see Chapter 4).
1. Belt tension is adjusted by automatic tensioners. However, the tension should be checked periodically along with the condition of the belt. To gain access to the belt, raise the vehicle and remove the right underbody protection cover. If necessary, turn the crankshaft using its pulley bolt.
2. Feel the belt with your fingers along its entire length, checking for cracks and delamination (see illustrations).
18.2a. Wear of the edges of the drive belt ribs.
18.2b. Transverse cracks (D) on the back side of the belt and rib separation (E).
18.2c. Fraying of side ribs (F), cracks (H) and delamination of side ribs (G).
18.2d. Rib separation (J), cracks (K).
18.2e. Timing belt damage:
A - Cracks in the coating, transverse fractures;
B - Lateral wear;
C - Cord wear;
D - Cracks on the teeth.
Also check that the belt is free of scuffs and polished areas. The belt should be inspected from both sides, which means it needs to be twisted. At the same time, make sure that there is no rust, cracks or burrs on the pulleys. The presence of shallow perpendicular cracks on the working surface of the belt is allowed. If these cracks do not extend beyond the boundaries of one rib, are not very deep and their number does not exceed 15 per 10 cm of belt length, there is no need to replace the belt.
3. Make sure the belt is correctly positioned on the pulleys and rollers.
4. If necessary, replace the drive belt (see Chapter 2).
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