Engine Cooling System - Key Concepts (Notes Review)

Flashcards covering the cooling system components, operation, and typical temperatures from the lecture notes (Pages 1–4).

What is the primary purpose of the engine cooling system?

To keep engine parts at the proper temperature.

List the main components of the water-cooled cooling system shown in the diagrams (Figure 4-1).

Cylinder block and cylinder head water jackets, radiator, water pump, thermostat, radiator hoses, and fan.

What is the typical ideal engine temperature range mentioned?

About 80°C to 90°C.

How does cooling water circulate at low temperature?

The water pump circulates water within the cylinder and cylinder head water jackets.

What happens when the cooling water temperature increases?

The thermostat opens, allowing cooling water to circulate through the radiator to lower the temperature.

What is the function of the water pump?

It forcibly circulates the cooling water.

How is the water pump driven?

By the engine’s rotation via a belt from the crank pulley, which drives the pump pulley; the impeller rotates.

What is the radiator’s basic function?

To cool the hot coolant that circulates in the engine water jackets.

What is the radiator core made of?

Many tubes through which cooling water flows and fins for heat dissipation.

Which hoses connect the radiator to the engine?

Upper hose and lower hose (アッパ・ホース and ロアー・ホース).

Where are the engine water jackets located?

In the cylinder block and cylinder head.

What components are shown as part of the radiator assembly in the diagrams (Figure 4-5/4-6)?

Radiator, radiator cap, upper tank, lower tank, radiator hoses, thermostat, water pump, drain plug, and sub-tank.