Thermostat
The thermostat is attached to the bottom of the water pump housing.
Main valve opening start temperature,°С: 90 (85) *.
Full opening temperature of the main valve,°С: 102 (105).
Piston stroke of the main valve, mm: 7
*Since model year 1982.
Radiator
YP Model Engine
The radiator is front-mounted, with aluminum plates, side plastic tanks. The radiator cap contains a low pressure air valve and an overpressure valve.
Overpressure valve opening pressure, kg/cm2: 1.20-1.35.
Engines of other models
The radiator is front-folded, with a tubular copper core, side plastic tanks.
Water pump
The water pump is installed at the front on the left in the cylinder block. It was driven by a V-belt simultaneously with the generator. The design of the water pump is non-separable and cannot be repaired.
Alternator drive belt
The belt tension is considered normal if the deflection of the belt when strongly pressed with the thumb (with a force of 5 kg s) in the middle of the belt branch between the pulleys of the crankshaft and the generator is about 15 mm.
Expansion tank
The opening pressure of the reducing valve in the tank cap, kg/cm2: 1.2-1.5.
Electric fan
Turning on and off the fan motor is carried out by the electric fan switch-on sensor located on the left radiator tank.
Electric fan brand: Bosch or AEG.
Temperature of inclusion of the electric motor of the fan,°C: 93-98.
Fan motor cut-off temperature,°С: 88-93.
Coolant
Capacity of engine cooling and interior heating systems, l:
- engine YP: 6.2,
- engines of other models: 6.0.
Coolant used: mixture of distilled water and type antifreeze «G10» with a ratio of 60% and 40% (at temperatures up to -25°C).
Replacement interval: every two years of operation.
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