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.
Components• Radiator• Fan• Coolant• Water Pump• Heater Core• Thermostat
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.
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.
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.
Water Pump• Centrifugal Design meaning the coolant is pushed outwards.• This causes the fluid to move throughout the system.• Pulley driven.
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.
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.
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.
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.
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.