Inspection Methods for High Engine Coolant Temperature

1 Answers
NicoleAnn
07/28/25 3:43pm
Inspection methods for high engine coolant temperature: 1. When the engine overheats, if the upper radiator hose is hot while the lower one remains cool, it indicates a thermostat malfunction; 2. If there's excessive hose pressure during cold starts, it suggests cylinder head gasket failure or cylinder wall cracks; 3. Milky white substance on the oil cap or oil floating in coolant indicates cylinder head gasket failure or oil cooler leakage; 4. Uneven heat distribution or significant temperature differences across the radiator surface point to radiator blockage; 5. For non-functional cooling fans, unplug the coolant temperature sensor connector to test fan operation; 6. For constantly running fans, check data stream to verify potential coolant temperature sensor false readings. Hazards of engine overheating: 1. Reduced engine power output; 2. Increased detonation leading to premature component failure; 3. Deteriorated lubrication causing accelerated wear between moving parts; 4. Severe cases may require engine overhaul or complete replacement.
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