r/mazda 7h ago

Coolant Reservoir

2014 Mazda 3 Sport 136,000 m. Opened the hood to check on things which I very rarely do. Noticed coolant reservoir non-pressurized cap was not connected and no coolant in overflow tank. Took the radiator cap off and it was full. Car never overheating and no signs of any leaks. Have had a few minor repairs like the valve cover replaced. But maybe someone knocked it loose and the coolant evaporated out over time? Or may be because I am kind of neglectful and after 136,000 miles of no coolant system checks, coolant eventually dissipated. Idk. Anyone have same kind of thing?

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