The document discusses the purpose and components of a liquid cooling system for an engine. A liquid cooling system regulates the engine's temperature by using a water pump to circulate coolant through the engine and radiator, where a fan helps cool the radiator and remove excess heat from the coolant. Key components include the water pump, radiator, thermostat, pressure cap, hoses, and coolant mixture of ethylene glycol and water.

1. COOLING SYSTEM

2. PURPOSE
• To regulate engines internal temperature.
• To remove excess heat from the engine.
• To provide heat to the passenger
compartment.

3. TYPES OF COOLING SYSTEM
• Air cooling system
• Liquid cooling system

4. LIQUID COOLING SYSTEM
• An liquid cooling system is the collection of
parts and substances (coolant) that work
together to maintain the engine’s temperature
at optimal level.

5. LIQUID COOLING SYSTEM

6. LIQUIDE COOLING SYSTEM PARTS
• Water pump
• Radiator
• Thermostat
• Fan
• Pressure cap
• Hoses
• Coolant

7. WATER PUMP
• A water pump is the simple device that will
keep the coolant moving as long as engine is
running

8. RADIATOR
• Radiator is used to cool the coolant delivered
from the engine.

9. THERMOSTAT
• It is a valve which measures the temperature
of the coolant.
• If the coolant is hot enough than its allow the
coolant to flow and if the coolant is not hot
than the flow is block.

10. THERMOSTAT

11. PRESSURE CAP
• It is a device which maintains the pressure in
the cooling system up to certain point.

12. COOLANT
• It is the mixture of ethylene glycol and water
the ratio is 50-50.