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Is it dangerous if the temp gauge goes up in the car while idling?
Wiki User
∙ 9y ago
Some older car water temps do go up on hotter days when sitting at lights and such but should come down fairly fast once you get going again. Almost all modern cars now have electric radiator fans that come on and off randomly when needed.
If the temp goes up fairly fast on a cooler day then you may be low on antifreeze and just needs to be topped off or replaced with new fluid. Antifreeze should be replaced every 2 to 4 years.
It should be fine unless it goes up fast and gets into the red zone (220 degrees or higher) for too long then you may have a boil over of your fluid. If it does it a lot then it could be bad for the engine parts.
Worst case scenario is the water pump may be dying.
Wiki User
∙ 9y ago
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