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Atlanta Detail Pros

Day: February 13, 2026

Coolant Reservoir Boiling Over But Temperature Gauge Is Normal: Causes and What to Check First

coolant reservoir boiling over but temperature gauge is normal

A coolant reservoir that is boiling or overflowing while the dashboard temperature gauge reads normal most commonly means a failed radiator pressure cap that can no longer maintain system pressure, or combustion gases leaking into the cooling system through a failing head gasket and pressurizing the reservoir, and in both cases the temperature gauge reading […]

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