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Check the markings on the side of the coolant reservoir. Do not take any further steps if the liquid is resting at the “full” marker on the reservoir. Inspect the hoses connected to the radiator for any leaks or damage. Remove the radiator cap and add coolant if the coolant level is sitting below the “full” marker.
The reasons behind a car temperature gauge reading high may include: Low coolant in the system. Incorrect coolant for the application. Cooling system problem. Bad temperature gauge. Some vehicle models use a warning light instead of a gauge. Whether the gauge reads high or the light comes on, it means engine driving conditions are not safe
Typically though it should be left to cool for 1-2 hours before it's cooled sufficiently to open the rad cap safely. If you're actually trying to check the coolant level then you probably need to wait more like 3-5 hours (as if the coolant is still warm it will show a falsely high reading due to expansion).
Photo in the Public Domain. When the low coolant level light comes on, you are dealing with three possibilities: The cooling system is working fine, but you need to add coolant to the reservoir. Your cooling system has developed a leak or a fault. The coolant sensor is bad. If the low coolant level light is on, check the level as soon as possible.
The coolant in your vehicle is green in color to distinguish it from other fluids. A green spot on your driveway likely means your vehicle is leaking coolant. If this happens, contact Gorruds Auto right away for a service appointment. Tip: While you are there, have the coolant and antifreeze level in your vehicle inspected by a member of the
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how to check coolant level in car
