Once a vehicle is started, coolant temperature should steadily and quickly decrease. Do you currently have motorcycle insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Once a vehicle is started, coolant temperature should steadily and quickly decrease. Answers True False Explanation After a vehicle is started, the coolant temperature should gradually begin to rise to a normal operating range. This questions appears in the following tests: Minnesota Passenger