On models with engines 1.1/1.3 l (rice. E:3) The cooling pump is located at the front of the cylinder block and is driven by the camshaft timing belt. The main pipe of the cooling system, which is connected to the rear of the cooling pump, provides a return to the pump of the coolant from the radiator, heater, cylinder block, etc.
The thermostat, which limits the flow of coolant through the radiator until the engine reaches operating temperature, is located in the housing on the water outlet at the rear of the cylinder head. There is also a temperature sensor. The interior heater and intake manifold heater use the engine coolant as a heat source and are integrated in the system between the cylinder head outlet and the coolant pump main pipe.
The radiator has a horizontal arrangement of tubes and is cooled by the air flow that occurs when the car is moving, or created by an electric fan. The radiator fan is turned on by a thermal switch when the coolant temperature reaches a certain value. The thermal switch is located in the side tank of the radiator.
On some models, a separate expansion tank is installed, which is included between the radiator and the thermostat housing (rice. E:3).
On models with engines 1.5/1.6/1.8 l (rice. E:4) The cooling pump is located on the side of the cylinder block and is driven by the alternator drive belt. The pump consists of a housing attached to the cylinder block, a pump cover with bearings and an impeller and a lower pipe, under which there is a thermostat.
On injection engines 1.8 l, an oil cooler is included in the cooling system (heat exchanger), cooled by the liquid of the engine cooling system.
The water outlet connected by a hose to the radiator is located on the side of the cylinder head. A hose is attached to the same pipe, which goes to the cooling pump housing. Behind the cylinder head is another outlet pipe, from which fluid flows to the heater and intake manifold. The temperature sensor is located on the same pipe (except for the 1.8 l injection engine, where the temperature sensor is located under the outlet pipe on the cylinder head).
Be aware that since August 1978, the normal operating temperature of the coolant has been raised, so new engine thermostats are not suitable for use in older engine cooling systems. This also applies to the radiator fan thermal switch, coolant temperature sensor and gauge.
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