3.9. Diagnostics of malfunctions of the cooling system
| Symptom | Possible reason |
| Overheat | Level of cooling liquid fell in system (see the Head Routine maintenance of the car). |
| The driving belt of the water pump is faulty, or adjustment of effort of its tension is broken (see the Head Routine maintenance of the car). | |
| Passability of a radiator is broken or its lattice is blocked (see the Head the Cooling system). | |
| The thermostat is faulty (see the Head the Cooling system). | |
| The radiator cover is damaged and does not hold pressure (see the Head the Cooling system). | |
| Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition). | |
| Overcooling | The thermostat is faulty (see the Head the Cooling system). |
| External leak of cooling liquid takes place | Hoses are damaged mechanically or as a result of material aging, or fastening by their collars weakened (see Chapters Routine maintenance of the car and the Cooling system). |
| The epiploon of the water pump is damaged (see Chapters Routine maintenance of the car and the Cooling system). | |
| The radiator, the heat exchanger of a heater or broad tank is damaged (see the Head the Cooling system). | |
| Tightness of drain traffic jams of the radiator/block of cylinders is broken, or release traffic jams of a water shirt of the block of the engine are damaged (see Chapters the Engine and the Cooling system). | |
| Internal leak of cooling liquid takes place | Laying of a head of cylinders is punched (see the Head Dvigatel). The head or the block of cylinders are burst (see the Head Dvigatel). |
| There are losses of cooling liquid | In system too much liquid is filled in (see the Head Routine maintenance of the car). |
| There is a vykipaniye of cooling liquid owing to an engine overheat. | |
| External or internal leak of cooling liquid takes place (see above). The radiator cover is faulty (see the Head the Cooling system). | |
| Circulation of cooling liquid is broken | The water pump is faulty (see the Head the Cooling system). |
| The cooling system is blocked (see Chapters Routine maintenance of the car and the Cooling system). | |
| The driving belt of the water pump is faulty, or adjustment of effort of its tension is broken (see the Head Routine maintenance of the car). | |
| The thermostat is jammed (see the Head the Cooling system). |