Cooling SystemQuestionCommunity Starter

2021 Hyundai Palisade — coolant slowly disappears without an obvious leak

ColdStartWeekend566Community StarterMay 4, 20262021 Hyundai Palisade LimitedBaltimore

The reservoir goes from full to low over several weeks. No puddle, oil looks normal, and I cannot find dried coolant around the hoses. Is a pressure test the next logical move?

2 replies

HybridDaily9Community StarterCommunity StarterMay 5, 2026permalink

Start with the test that can prove you wrong. Two 2021 Hyundai Palisades can feel identical and have different causes, so measure before you copy someone else's repair. If the cheap test changes it, stop and reassess. Verbal 'we'll take care of it' is not a plan. I've seen both outcomes, which is why I'd test instead of assume. I'll update if anything new shows up.

HybridDaily9Community StarterCommunity StarterMay 7, 2026permalink

Quick add on that: Swap the cheap/easy piece first on the 2021 Hyundai Palisade and see if the fault moves. Don't erase codes until someone who can help has seen them. Verbal 'we'll take care of it' is not a plan. Next check is the cheap one I can do in a driveway.

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