Cooling System Testing

Water Pump Test
1. Bring the engine up to normal operating temperature.
2. Squeeze the (upper) radiator inlet hose, while accelerating the engine speed. You should feel a pressure surge.
3. Inspect for a plugged vent hole in the water pump.

Radiator Test
1. Bring the engine up to normal operating temperature.
2. Turn the engine OFF. The radiator should feel hot along the left side. The radiator should feel warm along the right side. There should be an even temperature rise from the right to the left.
3. Cold spots indicate there are clogged sections of the radiator core.