Pic. 2-29. Cooling system details:
1 - radiator;
2 - thermostat housing;
3 - junction box;
4 - expansion tank;
5 - guide casing;
6 - top pad;
7 — an arm of fastening of the electrofan of the engine «EZ»;
8 — an arm of fastening of the electrofan of engines «RV» and «RP»;
9 — electric fan mounting bracket with an additional fan;
10 - electric fan;
11—additional fan;
12 - additional fan drive belt.
An aluminum finned radiator is located at the front of the car.
Radiator length on vehicles with engine «EZ» 430 mm. on vehicles with engines «RP», «RV» and «2E» 525 mm, on vehicles with air conditioning 720 mm. The temperature at which the main thermostat valve opens is 85°C.
Full opening temperature of the main valve 105°C.
Main valve stroke 7 mm. The two-speed electric fan is turned on and off by a sensor mounted on the left radiator tank. Brand and catalog number: Bosch 0 130 107 244.
Fan motor start temperature,°С:
- at 1st speed. 92-97;
- at 2nd speed: 99-105.
Fan motor cut-off temperature,°C:
- at 1st speed: 84-91;
- at 2nd speed: 91-98 (on the engine «AGG» air conditioned: 88-91).
Note. The power supply circuit of the electric fan includes a time relay that ensures its operation after the engine is stopped. The relay is activated by a temperature sensor installed in the radiator inlet hose when the coolant temperature reaches 110°C.
The roller of the centrifugal water pump is driven by the alternator drive V-belt.
Alternator drive belt size for non-power steering 9.5x950 mm, for power steering 9.5x730 mm.
Brand: Gates.
The belt tension is considered normal if the belt deflection, when strongly pressed with the thumb on the middle of the belt branch between the crankshaft and generator pulleys, is within 10-15 mm. The opening pressure of the pressure reducing valve in the cap of the expansion tank is 1.2-1.5 kgf/cm2.
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