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cooling stystem introduction

From the radiator to water pump your cooling system keeps your car running down the road.
Your car engine produces lots of heat, and keeping that heat in check is the critical job of the cooling system. Starting at the radiator, we will dive into the cooling system and see what you can do to keep it operating efficiently.
The cooling system is designed to remove heat from the engine to keep the engine operating in it's optimal temperature range. The cooling system is comprised of the following parts...
Water Pump: The water pump is either driven by the fan belt or the timing belt on some newer vehicles. The pump moves coolant from the radiator, through the engine, and back into the radiator. The pump has a shaft with a pulley on one end and a pump rotor on the other end. When the pulley is spun by a belt, the rotor moves the coolant.
Radiator: The radiator is a series of thin channels where the coolant flows through and it cooled by air flowing through it. It is important to keep your coolant in good condition to keep the channels open in the radiator. Following your manufacturers recommendation for changing your coolant, to keep your radiator in good shape.
Thermostat: The thermostat controls the flow of coolant through the engine. When your engine is cold, it actually operates with less efficiency. So until the engine warms up to it's ideal temperature, the thermostat keeps coolant from flowing. Your thermostat can fail in either an open or closed condition. When it fails in the open position, your engine may actually run too cold and you will have bad gas mileage. If the thermostat fails in the closed position, your engine will overheat since no coolant will be flowing through the engine.
Hoses: The hoses carry the coolant from the radiator to the waterpump and from the engine to the radiator. Hoses are generally made of rubber and can deteriorate with time. Hose should be flexible and not dry rotted (check for tiny cracks in the hose)
Coolant: Coolant is generally a mix of water and ethylene glycol. Many times called Anti-Freeze, coolant serves many purposes. As it's common name implies, coolant prevents freezing, but it also provides lubrication for the waterpump, increases boiling point of water, and keeps rust and scale from forming in your cooling system. Coolant must be changed on a regular basis, check your owners manual for the recommended schedule. PH level is critical to keeping your coolant from becoming a metal eating liquid. When you check your coolant for freeze point, also check out the PH level and make sure your coolant has not turned acidic.

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