Nissan Sunny service from 1991 to 1997 of release in n-14 body.
1. Maintenance instruction
2. Maintenance
3. Engines
4. Cooling system
4.1. Specifications
4.2. Hoses of system of cooling
4.3. Radiator
4.4. Thermostat
4.5. Electrofan
4.6. Sensors and switches of system of cooling
4.7. The pump of cooling liquid
5. Heating and ventilation system
6. Fuel and exhaust system
7. System of start-up of the engine
8. Coupling
9. Transmissions
10. Semi-axes
11. Brakes
12. Suspension brackets and steering
13. Body
14. Electric equipment


4. Cooling system

The system of cooling of the closed type, includes a radiator, the thermostat, the centrifugal pump of cooling liquid, the electric fan of cooling, hoses and switches. The drive of the pump is carried out by means of a maple belt from a crankshaft pulley.

The system functions as follows. Cooling liquid moves the water pump on the block of cylinders and a head of the block of cylinders, arriving through an inlet collector, a radiator of an oven and the carburetor in the thermostat case.

When the motor is not warmed up, cooling liquid arrives back from the thermostat case in the water pump. When cooling liquid reaches a certain temperature, the thermostat opens, and cooling liquid arrives through the top hose in a radiator. At that time, while okhladitelny liquid circulates through a radiator, it is cooled with an air stream at car movement. In case of need, cooling of liquid is helped by also electric fan. After achievement of the lower part of a radiator liquid is cooled and the cycle repeats again.

At normal working temperature of the engine cooling liquid extends, and the part it gets through the thin hose connected to a mouth of a jellied stopper of a radiator, to a broad tank. After the system will be cooled, the gathered okhladitelny liquid in a tank comes back to a radiator.

On some models okhladitelny liquid passes also through an oil radiator.

The electric fan (fans) of cooling located ahead of a radiator is supervised by the thermostat switch. At a certain temperature of okhladitelny liquid the switch turns on the fan.


Do not try to uncover a jellied mouth of a radiator or to rearrange any part of system of cooling when the motor is warmed up as there is a big risk to burn. In case the cover of a jellied mouth of a radiator has to be removed before the motor and a radiator completely cooled down (though it and it is not recommended), first of all it is necessary, that pressure fell in system of cooling. For avoidance of a burn cover a cover with a thick piece of a rag and slowly unscrew it until hissing will be distributed. When hissing will stop, specifying that pressure fell, continue to unscrew slowly a cover until then when it can be removed. If hissing repeats, wait until it completely will not disappear. All the time when opening a stopper try to hold yours the person and hands at safe distance.

Do not allow a situation that antifreeze got on your skin or on the painted surface of the car. Immediately wash out the spread liquid water. Never allow, that antifreeze was near you in the open container or formed a pool on the road or on a floor in garage. Children and pets are involved by a pleasant smell of antifreeze, and in case of its hit in an interior, it can lead to a lethal outcome.

In case the motor is warmed up, the electric fan can start to rotate, even if the motor does not work. Watch the hands, hair, spacious clothes when work with the motor.

Look subsection 5.2 for precaution taking measures at work with the models equipped with the conditioner. Be healthy a diesel engine

4.1. Specifications