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Can You Drive with a Car Water Temperature of 100 Degrees?

2 Answers

FelicityMarie

07/29/25 2:16am

If the water temperature gauge on the instrument cluster shows 100 degrees accompanied by a warning light, you must not continue driving. The normal operating temperature is around 90 degrees. Continuing to drive with the water temperature at 100 degrees can cause boiling over, cylinder scuffing, and other issues, severely damaging the engine. The subsequent repair costs can be very high. Below is relevant information: 1. Causes of abnormal water temperature: Coolant leakage; Insufficient coolant; Faulty cooling fan, preventing the engine from dissipating heat; Faulty water pump; Damaged water temperature sensor or gauge. 2. How to handle abnormal water temperature: If the water temperature is abnormal, pull over immediately. The correct approach is to idle the engine, open the hood, turn on the heater to dissipate heat quickly, and park in a shaded area. If the water temperature is abnormal, it is recommended to visit a professional repair shop, such as an S4 shop, for inspection to identify the issue before proceeding with repairs. If the abnormal reading is due to a faulty water temperature sensor or gauge, indicating the actual temperature is normal, the sensor or gauge should be replaced.

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DiRobert

08/12/25 6:15am

After driving for so many years, I've learned that you really shouldn't keep driving when the water temperature hits 100 degrees. Most cars are designed to operate normally around 90 degrees, so 100 degrees is already on the high side and could indicate issues with the cooling system, like low coolant or a malfunctioning fan. Continuing to drive could cause the engine temperature to skyrocket, potentially damaging cylinders or pistons, or even leading to engine seizure. I think it's safer to pull over, turn off the engine, and check for possible leaks in the radiator or if the coolant needs replacing. I remember a friend's BMW once reached 110 degrees, and he kept driving—ended up with a ruined engine and a repair bill over ten thousand. Safety first. Regular maintenance checks on cooling components like the thermostat and water pump can prevent such situations. If the temperature gauge shows even slightly higher readings while driving, it's best to be alert and address it early to save both money and hassle.

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