To drain a cooling system that does not have a petcock or drain plug in the radiator, ______.
A)remove the coolant temperature sensor
B)remove the heater return hose
C)disconnect the water pump inlet hose
D)disconnect the lower radiator hose

Question

Quizplus · Accepted Answer

Disconnecting the lower radiator hose is a common method to drain a cooling system when there is no petcock or drain plug available in the radiator. This allows the coolant to flow out from the lowest point in the system.

To Drain a Cooling System That Does Not Have a Petcock