Pump

Thermostat

Density of water

Water jacket

Impeller

Bearing

Seal

Pully

Radiator upper tank

Radiator lower tank

Engine water jacket

Expansion tank

Water outlet of water pump

Water outlet of radiator

Water outlet of water jacket

Water outlet of cylinder head

Boiling temperature should be low

Should develop foam

Oil viscosity should not be same in hot and cold condition

Oil viscosity should be suit the operating conditions