It was time to change the oil so I popped the hood and checked the levels. I noticed the coolant reservoir was EMPTY! I don't recall actively checking it in the past, but I think I would have noticed if it were empty. My question is, how much coolant can you expect to lose from evaporation from the reservoir?
I added about 3/4 of a gallon which brought me back to the full mark. However, now it's about midway between full and add. I drove it about 150 miles this weekend.
I looked all over for leaks, can't find any. Both engine and trans dipsticks look OK. I hesistate to change the oil just yet for fear of a head gasket issue. It does blow a little steam when I first turn it on and dribbles water out the tailpipe. I'm not sure how much condensation/steam is normal from the exhaust. And if it is a head gasket issue, would it definitely show up in the oil or is it possible for it to evaporate and go out the exhaust before hitting oil?
2007 Jeep Grand Cherokee Overland. Airaid CAI. Magnaflow catback exhaust system. Billet style antenna. Michelin Latitude Tour tires.