The cooling system is under pressure when the engine is running. Therefore, the boiling point rises from +100 to +126°C.
High temperatures contribute to more economical engine operation. The excess pressure in the cooling system is approximately 1.4–1.5 bar. If the pressure in the cooling system increases when the engine is hot, the pressure reducing valve on the expansion tank cap opens and the pressure is released into the atmosphere.
Excessive pressure in the cooling system (Mercedes-Benz E-Class W210)
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The article has been verified: Polyakov Zakhar Grigorievich
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