Exam 21: Cooling System Service

Today's high-temperature engines do not require an intact fan shroud for the cooling fan to be efficient.

While having a discussion, Technician A says that if the voltmeter reads 0.4 volt or more, the system should be flushed and refilled with new coolant to prevent corrosion of the metal parts in the system. Technician B says that the system should be flushed if the voltmeter reading is less than 0.4. Who is correct?

What is the process involved in testing the thermostat in the car?

What is the process involved in removing a thermostat?

When a leak is somewhere on the engine that cannot be easily seen, use an inspection ____________________ with a flashlight.