That would be normal. They are expansion tanks, so only excess coolant is pushed out of the radiator when warmed up due to expansion. Because it isn’t subjected to constant flow, the tank is usually substantially cooler than the operating temp. The thing you can do is use an infrared thermometer to measure the temperature of the upper radiator hose where it exits the engine and the top tank off the radiator while it is running. Should measure approximately what the thermostat is rated for.
Coolant reservoir tank not warm
So, I’ve been getting this ghost error code related to coolant intermittently. Today after mowing for an hour I popped the hood to have a look. Radiator=warm. Coolant hoses=warm. Coolant tank cold. Huh? First I put my hand to the tank and then stuck my finger in the fluid. Cold. Then I waited for the machine to cool off enough and took the cap off, thinking maybe the rubber hoses to the coolant tank were plugged. Blew some air through fine. Any guesses? Should I be concerned?
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Makes sense. Seems strange then there is so much coolant in the reservoir tank. Practically full. And it is called a coolant reservoir tank in the tech manual, not an overflow tank. 🤷♂️
It’s both an overflow and a reservoir. Excess fluid will overflow into it and if additional fluid is needed it will draw it back into the radiator.Makes sense. Seems strange then there is so much coolant in the reservoir tank. Practically full. And it is called a coolant reservoir tank in the tech manual, not an overflow tank. 🤷♂️
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