What are the reasons for high car water temperature?
2 Answers
High car water temperature is caused by issues such as damage to the cooling system's radiator fan. Hazards of high water temperature: After the engine cooling system overheats, the cooling system pipes may burst, or the heater core may rupture, leading to water damage to electrical components in the cabin. It can also damage the engine cylinder head gasket. If the cylinder head gasket is damaged, coolant may enter the combustion chamber and participate in combustion, potentially bending the connecting rod. Excessive engine temperature can cause engine oil to become too thin, reducing its ability to effectively lubricate internal engine components, leading to accelerated wear of engine bearings, crankshaft scoring, and piston seizure. Maintenance misconceptions: Blindly removing the engine thermostat; believing that engine temperature should be kept as low as possible; thinking that the tighter the water pump fan belt, the better; warming up the engine at idle; using a blowtorch to heat the oil pan.
I've encountered several instances of overheating while driving over the years. The main causes are often insufficient coolant or leaks, such as a cracked radiator or leaking hoses; a clogged radiator with accumulated dust and debris, coupled with a stuck fan that won't spin; a malfunctioning water pump preventing coolant circulation; or a faulty thermostat stuck in the closed position, blocking coolant flow. Engine issues like a blown head gasket or other internal problems can also lead to overheating. Before driving, always check fluid levels and ensure the radiator surface is clean. If the temperature suddenly spikes, don't push it—stop immediately and let the engine cool down to avoid cylinder damage or harming other components. Regular maintenance, including fluid changes and cleaning the cooling system, is essential for prevention.
