2. What is it?
• A way to cool your engine using liquid.
• Keeps engine at proper operating
temperature.(200 Degrees F)
• Also has other functions such as running your
heater inside your car.
3. Components
• Radiator
• Fan
• Coolant
• Water Pump
• Heater Core
• Thermostat
4. Radiator
• Made of Aluminum.
• Allows hot coolant to cool.
• Uses fins to guide air flow around coolant
hose.
• Many have side tanks to cool other fluids as
well.
5. Fan
• Made of metal or plastic.
• Either motor driven or electric.
• Motor driven fans are usually used on Rear-
wheeled drive, and electric is used on Front-
wheeled drive cars.
• Used to pull air through radiator to cool
coolant.
• Usually used with a shroud made of plastic or
metal to properly guide air flow.
6. Fans Cont.
• Most electric fans are connected to a
thermostat which controls when they operate.
• Clutch fans are used to control engine
operated fans. These engage at certain
temperatures also but the clutch itself
controls it.
7. Water Pump
• Centrifugal Design meaning the coolant is
pushed outwards.
• This causes the fluid to move throughout the
system.
• Pulley driven.
8. Thermostat
• Allows coolant to enter radiator once engine is
at operating temperature.
• Helps engine stay at operating temperature.
• Once engine cools it shuts again blocking off
the radiator.
9. Heater Core
• A small radiator located inside dash.
• Once “heater” is turned on coolant is allowed
into heater core.
• A fan called a blower motor then forces air
through heater core warming it and then
blows it into car.
10. Coolant
• Most modern day coolant is ethylene
glycol, also called antifreeze.
• Doesn’t freeze and has a higher boiling point
then water so its more efficient.
• It is very toxic though and is harmful if
swallowed. It is a bright green similar to the
background of this to warn humans of what it
is so its doesn’t get drank.
11. Coolant Cont.
• Has a sweet taste so sadly pets and other
animals are attracted to it if not disposed of
properly.
• Many new efficient non toxic coolants have
been hitting the market such as propylene
glycol.
12. Problems
• Leaks are the most common problem.
• They can be tested for using a cooling system
pressure tester.
• Usually a minor fix such as hoses, clamps, or
gaskets.
• Other problems include component
malfunctions such as radiators, fans,
thermostats or water pumps not working
correctly.
