What method checks for leaks in the coolant system?

• A. Pressure Testing
• B. Cab Lubrication Points
• C. Indicator Lights
• D. Blower Motor Operation

Answer: (A)

Pressure testing is the method used to check for leaks in the coolant system. By applying a controlled amount of pressure to the cooling system with a pressure tester, you simulate operating conditions and push coolant through potential weak spots. If a leak exists, the pressure will drop or coolant will seep from hoses, radiator, water pump, heater core, or connections, making the leak easy to identify. This approach reveals leaks that might not be visible when the system is cold and not pressurized, and it confirms the system can hold the proper pressure. Lubrication points, indicator lights, and blower motor operation don’t assess the coolant system’s integrity, so they aren’t used to check for coolant leaks.