Radiator (Coolant) System

The coolant will cool my engine AND heat up my cabin
So how does this work?

Interactive Tool

Throttle Body
Radiator
Moisture can sometimes buildup around the throttle body butterfly valve. The warm/hot coolant coming from the engine will heat up this moisture (sometimes ice crystals) and allow it to flow, freeing the butterfly to do its job.
The radiator's primary job is to cool the coolant back down to the operating temperature.
Radiator
Throttle Body
Water Pump
Heater Valve
The water pump will push the coolant through the engine.
The heater valve will open and close depending on the heater valve adjuster in the cabin. Higher heat the more open this valve will be. If your thermostat is set to the middle the valve will be 50% open.
Water Pump
Thermostat
Engine Block
Engine
Heater Valve
Combustion is a hot process. The engine needs cooled in order to operate properly and for safety reason. You wouldn't want all your rubber gaskets burning up. Temperatures can get up past 700F with high RPMs.
Under The Hood
In The Cabin
Heater Core
Heater Core
The heat from the coolat will be blown  from the heater core to your cabin. The heat is adjusted by a baffle or butterfly valve inside the heater valve.
Thermostat
Blower
You ever notice how you don't get hot air blowing in the winter time for about 5 minutes. Well it takes time for the engine to heat up and this thermostat to open up. As the thermostat opens up... well you can see by the diagram the hot coolant can now reach your heater core.

Various Radiator Pictures

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