Is it normal for the Tiguan's water temperature to reach 100 degrees?

2 Answers
DeCharles
08/26/25 4:16am
Tiguan's water temperature reaching 100 degrees is not normal. The normal operating water temperature for a car engine is around 90 degrees, typically within the range of 85-95 degrees. A water temperature exceeding 95 degrees indicates overheating, while a temperature below 85 degrees indicates underheating. Both overheating and underheating can adversely affect the engine. Reasons for the car's water temperature gauge alarm: Lack of coolant; Thermostat failing to open properly or getting stuck; Reduced water pump efficiency leading to poor water circulation; Cooling fan not operating correctly or running too slowly when the water temperature rises. Solutions for the car's water temperature gauge alarm: Lack of coolant: Inspect for leaks, repair, and refill to the correct level. Poor water circulation: If the thermostat fails to open properly or gets stuck, replace the thermostat. Consequences of high or low car water temperature: High engine water temperature can increase engine wear, reduce the lubricating effect of oil, and in severe cases, cause the radiator to burst. Therefore, immediate inspection is required if the engine overheats. Low engine water temperature can also reduce oil lubrication efficiency, worsen fuel atomization, increase fuel consumption, and affect the heating system. If the water temperature is too low, it also requires inspection.
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DamianMarie
09/08/25 5:28am
I've been driving a Volkswagen Tiguan for several years and often encounter the temperature gauge showing 100 degrees, which seems quite normal to me. Especially during summer traffic jams or when climbing hills on highways, the engine load increases, causing the temperature to rise to around 100 degrees. At this point, the cooling fan in the car automatically kicks in to lower the temperature, and once the fan starts running, the temperature drops back to the 90s. However, it's important to monitor whether the temperature remains consistently high or if a warning light comes on. If that happens, there might be an issue with the cooling system, such as insufficient coolant, a faulty fan, or a stuck thermostat. Regularly checking the coolant level is a good habit to prevent engine overheating damage. In short, 100 degrees isn't a big deal and is quite common during everyday driving.
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