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Vehicle’s Cooling System

Radiator

Check the exterior of the radiator for leaks and corrosion, damaged tubes and clogged fins. Also, inspect head gasket regularly. You can identify blown out head gasket with signs of oily deposits inside the fill neck of radiator.

Radiator pressure cap test

The radiator caps are a critical part of the cooling system and are prone to fatigue and wear, and this may lead to loss of pressure control. Therefore, check the radiator pressure cap for the recommended system pressure level at regular intervals.

Check thermostat if it is properly opening and closing

The thermostat controls the amount of coolant being released into the engine. It should open and allow coolant to pass once the engine is adequately heated. Sometimes thermostats can wear and they remain closed. A thermostat that is stuck in the closed position will result in poor circulation of coolant and this leads to overheating of the engine. It is important that the thermostat opens and closes to regulate the engine coolant temperature.

Pressure test to identify external leaks

You also need to check and identify any external leaks and damages to any of the components of the cooling system that include the water pump, radiator, engine coolant passages, heater hoses and heater core. If you suspect there is a problem with any of the components, replace it.

Internal leak test

When you find an internal leak in the cooling system, do an internal leak test by using a pressure tester to check if there is any combustion gas leakage. It is safe to perform a leak check when the vehicle is cold and the engine is switched off.