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1. A cooling system for an engine, comprising:
a pump driven by the engine and configured to circulate coolant through the engine; a heat exchanger configured to receive coolant from the engine and to reduce a temperature of the coolant; a thermostat fluidly connected to the engine and the heat exchanger, the thermostat configured to selectively direct coolant from the engine to the heat exchanger when a temperature of the coolant is greater than a temperature threshold of the thermostat, and to substantially block coolant from passing to the heat exchanger when the temperature of the coolant is less than or equal to the temperature threshold; and a valve fluidly connected to the engine and the heat exchanger, and connected in parallel with the thermostat, the valve configured to allow a portion of the coolant exiting the engine to pass through the valve to the heat exchanger during a first operating condition, wherein
during the first operating condition, a pressure of the coolant exiting the engine is greater than a pressure threshold of the valve.
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