Kia Sorento v6, 2018. Is it normal to lose a coolant from maximum level to the low level in the expansion tank after every 30000 miles? Need to check for leaks?
@chucktobias yeah, that is what I'm tending to do. Didn't notice anything bad in the exhaust pipe.. if there is a leak it seems a small one.. What is the first simplest step? Put UV dye, run for ~1000 miles and try to find leak symptoms outside of the engine/radiator/coolant pipes?
UV dye and/or pressure test should find the leak assuming it is not the head gasket. (It's not a huge leak, at least not yet, so you might not notice anything from the tailpipe if it is the head gasket.)
Of course be sure you're always checking the coolant level with the engine at about the same temperature since the coolant level rises when the engine heats up.