cooling systems purpose: to keep the engine at it’s most efficient operating temperature too hot!...
TRANSCRIPT
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Cooling SystemsPurpose: to keep the engine at it’s most
efficient operating temperature
TOO HOT! TOO COLD!
- poor lubrication- excessive heat- seizing- poor fuel economy
- poor lubrication- power loss- poor fuel economy
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Cooling Systems TypesAir CooledLiquid Cooled
Heat of Combustion = Surrounding metal = Passing AirHeat of Combustion = Surrounding metal = Passing Coolant = Coolant removed = Metal of Radiator = Passing Air
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Liquid Cooling Components
Water Jackets
Heater Core
Lower Rad Hose
Automatic Transmission Cooler
Upper Rad Hose
Radiator
Heater Corehoses
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Liquid Cooling Components
Thermostat
Fans
Temperature Sensor
Water Pump
Drive Belts
V BeltSerpentine
Straight Blade
Clutch Fan
Flex Fan
Electric Fan
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Antifreeze (Ethylene Glycol)Prevents Freezing by lowering the freezing temperature:
- can cause cracking of the block and head- very rapid over heating due to no flow
Prevents Overheating by raising the boiling temperature:- can cause severe engine damage- cylinder head warping- cracking of the block and head
Also contains other chemicals:
- water pump lubricants- corrosion inhibitors- leak agents- foam inhibitors
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Cooling System ServiceAntifreeze strength:System Maintenance
-visual inspection - strength testing- PH levels- pressure testing- replace hoses etc 4-5 yrs- replace antifreeze 2-3 yrs
Replace Antifreeze:
-every 2 – 3 years, due to contamination and added chemical determination
“The process”