1 - engine; 2 - radiator; 3 - expansion tank; 4 - heater radiator; 5 - thermostat housing; 6 - branch pipe 3 mm; 7 - water pump; 8 - thermostat; 9 - Thermal switch of the electric fan for blowing the radiator; 10 - Ventilation hole plug; 11 - expansion tank cap
For cars with a 1.6-liter (K7M) and 2.0-liter gasoline engine, the opening pressure of the exhaust valve cover (blue color) - 1.6 bar.
For cars with a 1.6-liter petrol engine (K4M), 1.4-liter and 1.9-liter diesel engines, the opening pressure of the exhaust valve cover (brown color) - 1.2 bar.
Filling volumes:
- Cars with a 1.4 liter petrol engine (K7J) - 6.0 l
- Cars with a 1.4-liter gasoline engine (K4J) - 6.9 l
- Cars with a 1.6-liter gasoline engine (K7M) - 6.0 l
- Cars with a 1.6-liter gasoline engine (K4M) - 6.9 l
- Cars with a diesel engine of 1.9 liters - 7.5 l
- Cars with a 2.0 liter petrol engine - 7.0 l
The circulation of the coolant is regulated by a thermostat. Until the engine is warmed up, the coolant circulates only in the cooling jacket of the cylinder block and in the heater radiator. As the coolant temperature increases, the thermostat of the liquid cooling system opens and directs the flow of coolant into the radiator. The coolant is supplied by a water pump and is driven by a V-belt. The coolant passes through the radiator from the bottom up and is cooled by the air passing near the cooling fins.
Additional cooling of the radiator is provided by an electric fan. As soon as the coolant temperature rises to approximately +92 C, the thermal switch switches on the electric fan for blowing the radiator via a relay. As soon as the coolant temperature drops below 82°C, the fan switches off.
The expansion tank functions as a coolant reservoir. It accumulates the coolant that increases in volume when heated and releases it back into the circulation circuit after the engine has cooled. Coolant is added through the neck of the expansion tank.
Warning! The electric fan may automatically switch on due to heat accumulated in the engine compartment, even when the ignition is switched off. Risk of injury or damage! Only perform work near the electric fan when the engine has cooled down.
Caution! When working on the cooling system, make sure that no coolant gets on the toothed belt. Ethylene glycol, which is part of the coolant, damages the base of the belt and after some time it may break, which is fraught with serious damage to the engine.
At the factory, an aqueous solution of antifreeze is poured into the cooling system. Antifreeze is concentrated ethylene glycol with protective anti-corrosion additives that prevent the cooling liquid from freezing and corrosion of the cooling system, and also increases the boiling point of the cooling liquid. Therefore, the cooling system must be filled with the mentioned aqueous solution all year round.
Caution! Only fill the system with coolants approved by RENAULT, such as CLACEOL RX (type D). The antifreeze must be suitable for use on units made of aluminum.
Since the content of anti-corrosion additives in the coolant decreases over time, it must be changed periodically as part of maintenance.
Material is located on the source website renaultbook
Antifreeze should be mixed with clean or distilled water.
In our latitudes, protection against freezing should be provided down to -25°C (see table).
Attention! The proportion of antifreeze in the coolant should not exceed 60%. If its content is higher, the freezing point of the coolant decreases. In addition, in this case, the cooling effect of the liquid also decreases.
Table of the ratio of antifreeze and water in coolant
| Engine | Coolant | -25°C | -40°C |
| 1.4-/1.6 l E7J/K7M | concentrate water | 2.25 l 3.75 l | 3.0 l 3.0 l |
| 1.4-/1.6 l E4J/K4M | concentrate water | 2.4 l 4.5 l | 3.45 l 3.45 l |
| 2.0 l | concentrate water | 2.5 l 4.5 l | 3.5 l 3.5 l |
| 1.9 l diesel | concentrate water | 2.75 l 4.75 l | 3.75 l 3.75 l |