oil cooler bypass valve

oil cooler bypass valve
An oil-temperature-controlled valve which closes the oil circuit through the oil cooler when the oil is still cold; similar function as the thermostat in the engine cooling system. Engine oil is heated to a considerable temperature in engines subject to a high thermal load. This in turn greatly reduces the lubricating ability and the cooling capacity of the oil. Thermostats control the oil volume to the oil cooler, thus ensuring constant temperature of the oil

Dictionary of automotive terms. 2015.

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