

                               COOLING SYSTEM


          PARTS OF YOUR COOLING SYSTEM;

          1. COOLANT
                 Is the fluid that transfers the heat of the exploding
          gas inside the cylinders of the engine to the radiator where
          it is cooled .

                 It is a mixture of antifreeze and water not only to
          keep the coolant from freezing but to keep the boiling point
          of the coolant up and also prevent the engine from rusting.


          2. COOLANT RECOVERY

                 This system is a small container that acts as a
          reservoir for coolant forced out of the engine through the
          overflow tube when the engine is hot.

                 It returns the coolant to the engine when the engine
          cools down.


          3. FAN

                 The fan draws air through the radiator to cool the
          fluid or coolant. You will find it between the engine and
          the radiator. Some are belt driven and others have their own
          electric motor.


          4. HOSES

                 The hoses carry the coolant to and from the radiator.
          One at the top of the radiator and one at the bottom. They
          are called radiator hoses. Heater hoses also carry coolant
          to the heater to make the heater hot.

          5. RADIATOR FILL HOLE

                 Is at the top of the radiator or the reservoir and
          covered by the pressure cap.


          6. RADIATOR

                 Is located in the front of the engine compartment. It
          consist of a many small tubes of copper or aluminum held in
          place vertically by strips of copper or aluminum.

                 The whole system is called the radiator core. This
          core is surrounded by a frame that holds it in place.

                 This system allows maximum transfer of heat from the
          coolant to the air going through the radiator.


          7. PRESSURE CAP

                 Raises the boiling point of the coolant by increasing
          the pressure by the use of springs in the cap.

                 Water at sea level boils at 21O degrees. With the
          combination of anti freeze and pressure the coolant can rise
          to a temperature of 250 degrees.

                 This is necessary for today's high compression
          engines.


          8. THERMOSTAT

                 Is a temperature sensitive coil usually placed next
          to the engine at the end of the upper radiator hose.

                 While the engine is cold the valve attached to the
          coil will be closed. After the engine warms up the valve
          starts to open.

                 The warmer the engine gets the wider the valve will
          open.

                 This action of the thermostat lets the engine warm up
          faster and saves gas.

          9. WATER JACKETS

                 Are located inside the engine block around the
          engine's cylinders and in the engine block head where the
          top cylinders are located, to keep them cool.


          10. WATER PUMP

                 The water pump pumps the coolant from the radiator to
          the engine around the water jackets and back to the
          radiator. The car heater is also in the circuit.


                 Knowing what every part does gives you a good idea of
          how the whole cooling system works. There are problems that
          just happen.

                 Most are due to aging or wear. The first sign of
          trouble with the cooling system is a small puddle under your
          car.

                 If you find such a puddle rub your finger in it and
          smell your finger. If it smells like antifreeze it is a
          cooling system leak.

                 If it has no odor it might from the air conditioner,
          or condensation from an air conditioner hose or metal tube.

                 If you find it is a coolant leak, check the ends of
          the hoses for wetness. Look for a white stain on the
          radiator or hoses.

                 While you are checking the hoses feel if they are
          hard or very soft it might be a good idea to change them or
          have them changed, and the heater hoses too.   END