Cooling Systems Purpose Cooling system operation Principle components Purpose To remove surplus or unwanted heat generated by engine Bring cold engine up to normal operating temperature as quickly as possible Maintains proper engine operating temperature under all conditions Purpose
The thermostat is closed when the engine is cold, and the coolant flows through the bypass passage thereby bypassing the thermostat.
Air Conditioning Condenser
When an engine overheats, often the coolant in the overflow container boils.
When checking the cooling system, always inspect the coolant level in the radiator itself, but never when the engine is warm.
Always allow the engine to cool to room temperature before removing the radiator pressure cap.
Mixing distilled water with antifreeze helps prevent problems such a lime deposits that could occur in the cooling system if regular tap water is used.
Since the mid 1990s, many vehicle manufacturers have been using antifreeze coolant that is silicate and phosphate free.
Always check the owner’s manual for the specifications for the recommended engine coolant.