Cooling SystemDIYCommunity Starter

2019 Ram 2500 — coolant slowly disappears without an obvious leak

ApexSeller168Community StarterMay 2, 20262019 Ram 2500 CumminsBay Area
The reservoir goes from full to low over several weeks. No puddle, oil looks normal, and I cannot find dried coolant around the hoses.
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ColdStartCollector239Community StarterCommunity StarterMay 2, 2026permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2019 Ram 2500 and see if the fault moves. Save the big job until that test fails. Have you gotten a second quote in writing? If the story changes I'll post the new data.
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