This one has been confusing and I'm not all that familiar with these engines so looking for a little advice/direction on where to go next. Working on a 14 Durango with the 5.7 hemi with coolant loss but no visible leak.
It overheated one day on the way to work so shut it down, let it cool, and went straight to auto parts store to get coolant as it was low. No visible leaks at this time so I filled it up and watched it the next day. No issues but the following day overheated again with low coolant and some coolant out of the overflow. Filled it up a second time and ran it hard. No visible leaks again and no overheating.
Sat for a few days and went to check coolant and it was low again. There was some coolant on the ground around where the overflow is.
So Far:
Oil is clean
Exhaust smells fine/no smoke
No check engine lights
Engine runs fine
New thermostat
New radiator cap
My next step is to get some dye and probably a pressure tester for the cooling system.
Any other thoughts on what this one might be. I did a water pump probably ~2 years ago as it was coming out of the weep hole and bearing was bad. No issues since then.