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As the coolant flows through these passages, it picks up heat from the engine. interconnecting hoses to transfer the coolant from engine to radiator (and also to the car’s heater system where hot coolant is used to warm up the vehicle’s interior)Ī cooling system works by sending a liquid coolant through passages in the engine block and heads.a radiator cap to control the pressure in the system.a thermostat to control the temperature of the coolant.passages inside the engine block and heads.Many modern motorcycles still use air cooling, but for the most part, automobiles and trucks use liquid cooled systems and that is what this article will concentrate on. If the temperature is allowed to get too hot for too long, the engine will self destruct.Īctually, there are two types of cooling systems found on motor vehicles: liquid cooled and air cooled.Īir cooled engines are found on a few older cars, like the original Volkswagen Beetle, the Chevrolet Corvair, and a few others. If the engine temperature is too low, fuel economy will suffer and emissions will rise. Today’s cooling system must maintain the engine at a constant temperature whether the outside air temperature is 110 degrees Fahrenheit or 10 below zero. Oh sure, it has become infinitely more reliable and efficient at doing its job, but the basic cooling system still consists of liquid coolant being circulated through the engine, then out to the radiator to be cooled by the air stream coming through the front grill of the vehicle. The modern cooling system has not changed much from the cooling systems in the model T back in the ’20s.
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Controlling these high temperatures is the job of the cooling system. Obviously, these explosions produce an enormous amount of heat and, if not controlled, will destroy an engine in a matter of minutes. This article is broken down into four sections:Ī typical 4 cylinder vehicle cruising along the highway at around 50 miles per hour will produce 4,000 controlled explosions per minute inside the engine as the spark plugs ignite the fuel in each cylinder to propel the vehicle down the road.