What are the consequences of excessively high engine coolant temperature?
1 Answers
Excessively high coolant temperature can lead to overheating of components such as pistons, cylinder walls, cylinders, and crankshafts, causing engine oil to thin and lose its lubricating properties. This may result in the burning through of cylinder head gaskets and piston ring scuffing. The main causes of high engine coolant temperature are as follows: 1. Cooling fan failure: The cooling fan may be controlled by either a thermostatic switch or a coolant temperature sensor. 2. Insufficient coolant: Premium vehicles require year-round use of antifreeze, though water or distilled water can serve as temporary substitutes. 3. Thermostat malfunction: If removing the thermostat, the minor coolant circulation loop should be blocked to ensure all coolant passes through the radiator for cooling. When installing a new thermostat, pay attention to the water bypass hole.