I have 270,000 on it and I replaced the thermostat and housing....ive been told that when the water pump starts to go out it was designed to leak a certain route.it only overheats when it gets low on coolant....it looks like it's coming from behind and above the water pump but it's hard to tell due to everything packed so tight under the hood.I had a couple people say it's a blown head gasket or cracked head and or block.I know better than to add water or coolant while it's hot....i don't even think u can because the bolt on top of the thermostat housing