what does the cooling system do? what happens if an engine runs too cool or too hot? what are the...
TRANSCRIPT
What does the cooling What does the cooling system do?system do?
What happens if an engine What happens if an engine runs too cool or too hot?runs too cool or too hot?
What are the Types of What are the Types of Cooling Systems?Cooling Systems?
Thermal DynamicsA camp fire explains it all!
ConductionConduction
ConvectionConvection
RadiationRadiation
Heat Transfer Continued
• Only 1/3 of heat produced in an engine is actually used.• Where does the remainder go?• What are some “very good” and “good” heat
conductors?• How much energy do you radiate?• What is ambient air temperature?• Thermal Dynamics in relation to material’s
surface condition.• Thermal Dynamics in relation to color.
Liquid Cooling Systems• What do coolants do for an engine?• Freezing Point?• Boiling Point?
• Anti-Freeze or Anti-Boil?• What makes-up a coolant?
How it Works:
Liquid Cooled Systems - A pressurized closed circulation systemLiquid Cooled Systems - A pressurized closed circulation system
Parts of a Liquid Cooling System
• Radiator & Pressure Cap• Fan & Belt• Coolant Pump• Water Jackets• Thermostat• Hoses• Coolant
Radiator & Pressure Cap• Radiators:• Types: (2)• Testing & Repair: (2)• How does the radiator work?
• Pressure Cap:• Functions: (2)• How a pressure cap works:
Fan & Belts• What function does the fan serve?• Types of fans?
• What can the fan belt do for the engine’s cooling system?
Coolant Pump
• Definition:• The water pump is the heart of
the cooling system.• Sealed lubrication for the pump
bearings, why?
Water Jackets• Passageways through which water circulates
through the block.
Thermostat
• Purpose of a thermostat?• Importance of a thermostat?• How does a thermostat work?• Practical thermostat information:
Testing a ThermostatTesting a Thermostat
Minor System Parts
• Hoses:• Purpose of Hoses:• Inspecting hoses, what do you look
for?• Installation of hoses?
• Filters:• Jobs a filter can perform:
Coolant
• Four Properties of Coolant: (4)• Mixing antifreeze and water:• Water Type?• Mixture Percentage
• Antifreeze Specifics:• Selection• Temperature• Testing• Flushing
Air Cooled Engines
• How do they work?• Parts:• Fins• Shroud• Fan • Pre-Cleaner
• Maintenance:
General Cooling System Tips