Will an Engine Temperature of 120 Degrees Cause Cylinder Scoring?

[ParkerFitz]

An engine temperature of 120 degrees can cause cylinder scoring. The normal engine temperature is 90 degrees, and 120 degrees is considered high. It is important to monitor whether the temperature continues to rise while driving. If the temperature keeps increasing, it is best to pull over and call for roadside assistance. The following situations can cause an engine to overheat: 1. Insufficient coolant: Coolant leaks or low coolant levels can cause the engine temperature to rise. In such cases, check the coolant level and top it up if necessary. After a few days, recheck the level to see if it has dropped significantly. If it has, locate the source of the leak. 2. Faulty cooling fan: A malfunctioning cooling fan can prevent heat from being effectively transferred to the coolant, leading to overheating and potential boiling. 3. Faulty water pump: Issues with the water pump, such as seized bearings or damaged impellers, can slow down coolant circulation, resulting in engine overheating. Common problems include cracked impellers or impellers coming loose from the pump shaft.

[MacBrooklyn]

When the water temperature indeed reaches 120 degrees Celsius, the risk of cylinder scoring is quite high. The ideal operating temperature for an engine is designed around 90 degrees. Once it exceeds 100 degrees, problems start to emerge. 120 degrees is way too high—it causes the engine oil to thin out, significantly reducing its lubrication effectiveness. Without proper oil protection, the piston rings can excessively rub against the cylinder walls, leading to cylinder scoring—essentially, internal engine damage from scratches. I've handled several cases where the water temperature spiked while driving, and by the time the owner noticed louder noises or power loss, the engine was already completely ruined, costing a fortune in repairs. Prevention is key: regularly inspect the cooling system, including the thermostat, water pump, and coolant levels/cleanliness; avoid aggressive driving, especially on long trips. If the temperature gauge climbs above 110 degrees, pull over immediately, shut off the engine, and seek a mechanic’s diagnosis—don’t delay.

[DiEliana]

I once experienced a situation where the water temperature surged to 120 degrees, which happened when the air conditioning was cranked up too high during a traffic jam. At that time, the car suddenly emitted hot steam, and the engine noise became very loud. Later, during a check-up, it was diagnosed as minor cylinder scoring. Cylinder scoring refers to problems with the engine cylinders, caused by rapid metal expansion due to high temperatures, where the engine oil lubrication can't keep up, leading to friction and scratches between parts. Normally, the water temperature should be between 80 and 100 degrees; 120 degrees is definitely excessive. Continuing to drive under such conditions can, at best, reduce the engine's lifespan, and at worst, lead to a breakdown requiring major repairs. Regular vehicle maintenance is crucial: clean the radiator to remove dust buildup, ensure the coolant level is adequate, avoid aggressive acceleration in summer, and check if the fan is running when parked. Remember, if the water temperature warning light comes on, stop immediately—don't worry about the distance left to travel. Safety first, to avoid the hassle of repairs later.

[SanLucas]

A water temperature of 120°C does indeed pose a high risk of cylinder scoring. When the engine is running, excessively high temperatures cause the engine oil to thin out, reducing its lubricating effectiveness and increasing friction between the pistons and cylinder walls. Cylinder scoring indicates severe wear. The ideal water temperature is around 90°C, and exceeding 110°C becomes dangerous. Once it reaches 120°C, you should immediately stop the vehicle to inspect the cooling system or engine oil. Preventive measures include regular maintenance.

[VonMargaret]

As an experienced car owner, I've observed overheating multiple times, and 120 degrees is not a good sign. The engine runs smoothly at the normal 90 degrees, but when it heats up to 120, parts expand, gaps become smaller, and oil can't flow properly, leading to increased friction and cylinder scoring. It might hold up for a short while, but prolonged exposure will definitely cause damage. This is often caused by insufficient coolant or fan failure. I recommend checking the radiator every time you wash your car and replacing the antifreeze once a year. If the temperature rises, stop the car and report it for repair. This can save a lot on repair costs.