Parts of a Radiator

Parts of a Radiator
There are a few main parts that make up the radiator, and each plays a role in the cooling process. They are:
Core: The core is the largest part of the radiator. It’s a metal block with cooling fins that help vent the air. The core is where hot liquid releases heat and gets cooled before being sent through the process again.
Pressure cap: The pressure cap works to help seal the cooling system so it can remain pressurized. The coolant in the radiator is pressurized to prevent the coolant from boiling. It also keeps the system more efficient.
Inlet and outlet tanks are where coolant flows in and out of the radiator and are located in the radiator head. Hot liquid flows from the engine through the inlet tank, and once it is cooled, it goes out through the outlet tank and back into the engine.
Radiator hoses: Coolant moves through the engine via the radiator hoses. They are important for connecting the inlet and outlet tanks to the radiator and the engine.
Radiator Failure
An engine can overheat whenever it operates in sweltering weather. However, the risk of overheating goes up considerably if the radiator is low on coolant or there is a leak in one of its hoses. Other possible radiator failures include a malfunctioning thermostat, a mechanical issue with the fan, or a faulty pressure cap that cannot pressurize the system, resulting in an overflow of coolant. In any of these cases, the engine can overheat, resulting in severe damage.
To avoid costly repairs, car owners should be aware of the signs of radiator failure. Symptoms include:
An unusual rise and fall in the instrument cluster temperature gauge
The sight or smell of smoke coming from under the hood of the car
Any amount of green liquid (coolant or antifreeze) collecting under the vehicle
Visual evidence of rust on the components of the cooling system 
A professional mechanic should examine the cooling system and radiator if any of these symptoms become apparent.
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