Mystery coolant leak stops vacaton
We were 2 hours into a 4 hour trip to the coast for a week. Received two alarms for low coolant level. Each time I added coolant to the tank. Gotta be a reason for it. I checked all the normal items, ...
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With my 5.9 Cummins, turned out the mystery leak was way up front from one of the coolant lines to the dash heater. Turning off the two brass valves (one down low on the engine, the other up a foot or two) solved the leak issue temporarily. A couple years later, got around to fixing it and it turned out to be a rusted through short piece of steel tubing near the front of the rig. Cutting it back past the leak and adding new hose made a permanent fix.
