Which of the following circumstances can cause excessive engine overheating?

Question

DentroTest · Accepted Answer

Excess engine temperature can be due to faults in the cooling circuit. The water pump circulates the coolant through the engine passages and to the radiator. If the belt that drives it is loose or breaks, the liquid stops circulating properly, the heat of combustion is not removed and the engine overheats. The proximity between the cylinders and the exhaust manifold is not the cause: it is a construction feature of the engine and does not explain excessive heating. Nor is a spontaneous evaporation of the antifreeze, because the circuit is sealed and pressurized and the liquid does not evaporate through normal use.

Which of the following circumstances can cause excessive engine overheating?

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