2. The number of belts installed on a car depends on the type of engine and on the vehicle's equipment. Belt drive is provided for the generator, coolant pump, air conditioning compressor and power steering.
26.4 Air filter insert with thermostat
26.5 Thermostat operation diagram
1. To the air temperature sensor; 2. Vacuum drive; 3. Opened; 4. Closed; 5. Cold air; 6. To the carburetor; 7. Dividing damper; 8. Hot air from the exhaust manifold
3. The condition of the belts is checked by touch and inspection (illuminating the belts with a flashlight). Check for detachment of the rubber adhesive pad on both sides of the belt base, warp tear at the ends of the belt tape, hardening, damage to the belt surface (cracks, separation and wear of the tracks, see photo). Also check for wear and glass transition in the belt material, which causes a glossy appearance on the belt. Twist the belt and inspect both sides.
4. Check belt tension. With a distance between the centers of the pulleys from 170 to 280 mm, the belt deflection should be about 6 mm. If this distance is from 300 to 400 mm, then the deflection should be about 13 mm (photo).
5. Special devices are provided to adjust the tension (photo).
6. To adjust, loosen the unit mounting bolts and move the unit by tightening the belt (or turn the adjusting screw). Tighten the mounting bots and check the tension. If the tension is correct, then tighten the mounting bolts (photo). The tension of the toothed belt is adjusted by moving the tensioner roller.
27.3 Some characteristic signs of belt wear.
1. Cracks; 2. Glass transition; 3. Grease ingress; 4. Tear of the belt base
7. It is recommended to change all belts at the same time.