How Automotive Cooling System Service Process
The automotive cooling system is device for transferring the excess heat developed in cylinders to the air surrounding the car. By this means the temperature of the engine surfaces is held down to workable minimum.
It is two step automotive cooling system process:
Flows through the water jacket of the engine propelled by a centrifugal pump. This water is drawn from the bottom of the radiator, forced through the engine passages and then delivered to the top of the radiator. During its trip through the engine the temperature of the water rises.
Is forced through the radiator by means of the fan assisted by forward motion of the car. The air cools the water in the radiator as it flows from top to the bottom, so that temperature of the water at the bottom is considerable less than at the top.
What Are The Proper Automotive Cooling System Basic Requirement?
Fan and Water Pump:
Should handle the maximum amount of air and water which means that both components must be in good working condition for the automotive cooling system and the belt which drives them both should not slip on its pulley.
Water passages in the car engine radiator and hose must be clear and the metal surface should be clean so that transfer of heat from engine to water and from water to radiator is speedily accomplished.
Likewise the external surfaces of the radiator must be clean so that the air flowing through it is able to absorb the heat in the automotive cooloing system water with maximum efficiency.
The automotive cooling system
Automotive cooling system should be kept filled to proper level which is from one liter to one and half in-below the bottom of the filler neck. Water expands about 8% from 32 to 180 degrees. If filled completely with cold water, about 1qt would spill over the overflow tube thus wasting anti-freezer.
Should be in good working order on the automotive cooling system and should be the correct rating of your car and the temperature. Low opening thermostats for water and anti-freeze start to open at 140 or 150 degrees. High opening thermostats suitable for ethylene glycol anti-freeze start open at 160 or 180 degrees. Full open is about 20 degrees higher that the opening temperature. A damaged or stuck thermostat should be replaced immediately to avoid overheating automotive cooling system.
Pressure Radiator Caps.
Are used to permit operating the engine at higher temperatures by raising the boiling point of the water. Cap pressures are stamped on the ear of the cap. A leaky cap will not hold pressure.
Materials to lower the freezing point of water include Methanol or Methyl or Wood Alcohol, Ethanol or Grain or Denatured Alcohol. Ethylene–Glycol or Permanent Type Anti-Freeze.
When sold as radiator or anti-freeze, these usually have corrosion inhibitors added. Honey, sugar, salt (sodium chloride), calcium chloride, salts of any kind, kerosene or oils are either ineffective, dangerous or cause damage to the automotive cooling system. Follow directions and package and use freeze provided by Manufacturer.
Unavoidable Impurities in Automotive Cooling System Water.
Including dissolved air, cause corrosion of the various metallic surfaces the automotive cooling system liquid contacts. If these surfaces are cast iron, as in the case of the cylinder block or cylinder head.
If there are any other iron surfaces, the corrosion is called rust (steel is mostly iron). On the other hand, if the surfaces are brass or copper in the radiator core, solder (or other metal except iron and steel) the term corrosion is used.
However, whether we talk about corrosion in general or rust in particular, in either case the surface of the metal in contact with the water in time may become coated with a corrosion (or rust) which interferes with the transfer of the heat from the cylinder block to the water in one case and from the water radiator core to air in the other case.
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