A radiator overflow tank collects the expanding coolant that is heated by the engine and recycles it back into the coolant system once it loses enough heat. The radiator overflow tank works in conjunction with the radiator cap to protect the engine and prevent coolant loss due to overflow, according to HowStuffWorks.Continue Reading
The radiator overflow tank serves as the reservoir for engine coolant that is heated to its boiling point and would otherwise rise up and out of the radiator. Working in conjunction with a thermally activated spring built into the cap, the overflow tank creates a closed cooling system that is much more reliable and practical than previous designs. As the temperature and pressure rise to the coolant's boiling point under pressure, the cap spring activates and allows the heated liquid to flow up and into the overflow tank. The fact that the system is under pressure means that the liquid reaches a higher temperature before boiling, further increasing the effectiveness of the system.
Prior to the advent of effective closed systems, large mechanical fans were used to cool most engines, though they had their drawbacks. Mechanical fans were ideal for driving at low speeds but actually cooled engines too much at high speeds. The solution was the advent of electric fans that turned on and off as the engine temperature rose and fell. Most modern vehicles and mechanical engines employ a combination of an electric fan and a closed cooling system.Learn more about Car Parts & Maintenance
The purpose of a car water pump is to push coolant through the car's engine block, radiator and hoses to get the engine heat away from the system. Most frequently, the water pump drives off the crankshaft pulley or the crankshaft itself. The coolant that gathers between the impeller blades travels outward using centrifugal force, and suction draws the coolant into the water pump from the radiator.Full Answer >
To read an engine coolant system diagram, start from the radiator. Air flows through the radiator and the cooling fan to cool the water that circulates through the engine. The water reaches the heater core and hoses, raising the temperature on the thermostat, located on the top of the system. The hot water returns to the radiator through the heater hoses, where it is again cooled and recycled back through the engine.Full Answer >
The presence of water in a vehicle's fuel system can present several problems including the alteration of fuel to air ratio that will reduce engine power that may cause the engine to stall. If large amounts of water enters a vehicle's fuel system, it can lead to prolonged cranking, stalling and a low engine RPM, or revolutions per minute.Full Answer >
To add antifreeze to the radiator reservoir, unscrew the reservoir cap, and pour the coolant in the reservoir tank until it reaches the full line. You need antifreeze, otherwise known as radiator coolant, that is one part coolant and one part water. Do not remove the reservoir cap if the engine is still hot.Full Answer >