They are installed on a 16-valve engine and a diesel engine. When the engine stops running, the circulation of the coolant also stops, which can lead to local overheating of the cylinder head. This can be avoided by an additional electric coolant pump, which, when the temperature is too high, ensures the circulation of a certain portion of the coolant after the engine is turned off. The additional electric pump only works when the engine is turned off. When a certain temperature is reached, the additional electric coolant pump is switched on. The engine cooling system fan is also switched on simultaneously with the additional pump.
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Additional electric coolant pump (Renault 19)
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