Almost all leak at the thermostat--slow but sure.replace the stat and maybe the water neck to prevent the coolant loss My wifes 01 Grand Cherokee has been a PITA on trouble but she LOVES that thing! Heater door flaps is a $$ big one--window motors ( go aftermarket 1/2 price ) rear end whine--let it whine... oil sender bad shows NO oil pressure--thats good on Monday morning! New brakes all around and the pedal still goes way down oh..don't forget that power steering hose coupler that is a POS and cost $175 to fix but I have to put up with it so I can be a Mopar man--right?