What Are the Causes of Overheating in Buick Regal?

1 Answers
McCollin
07/29/25 3:27pm
1. Thermostat failure: The coolant only circulates in a small loop without passing through the radiator for cooling. 2. Cooling fan not working: This could be due to the temperature control switch not activating or a malfunctioning coolant temperature sensor. 3. Water pump failure: The impeller may slip or get stuck, causing the belt to break. 4. Insufficient cooling medium: Low coolant level or radiator leakage. 5. Incorrect ignition timing and high oil pressure: The temperature gauge reading differs from the actual temperature. Solutions for overheating: 1. Touch the upper and lower radiator hoses to determine the issue: If there's a significant temperature difference between the hoses, the thermostat might not be working. If a replacement isn't immediately available, remove the thermostat temporarily as an emergency measure and replace it as soon as possible. 2. If the car overheats, do not turn off the engine immediately: Pistons, cylinders, and the crankshaft are in a state of high-temperature expansion, and shutting off the engine may cause soft metal to detach or even lead to cylinder seizure. The water pump also stops, halting coolant circulation while engine components remain hot, potentially causing damage. The correct approach is to turn the car's heater to maximum to help dissipate heat and open the hood to aid cooling. Wait until the coolant temperature returns to normal before turning off the engine. 3. If overheating occurs while driving, never pour cold water on the engine: This could crack the engine block. Also, avoid opening the radiator cap immediately to prevent scalding from hot coolant. The right method is to turn off the engine, wait about 20 minutes, then open the radiator cap and add coolant if needed.
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