I had a low coolant warning last week. Drove home from work, about 20 mins, at 105 F (typical Austin). Over night the temp dropped quickly to low 70's (also typical.) Started in the morning, and shut off as soon as I saw message. Resevoir was bone dry. Barely even residue. Immediate "LR Forum Panic Dissorder" set in! Visions of bad water pumps, hose couplings,and cracked water pipes set in! Under hood was spotless, driveway as well. Parking spot at work clean. No sign if leak anywhere. So i decided to get coolant and take a chance. I put about 1.2 litres in the resevoir and called the San Antonio dealer. As soon as I said low coolant warning, she asked if the temp dropped much over nite? Yes, I said. She said to start it and wait a few minutes and see if it comes up.
It did. And overflowed all the coolant I had added!. Nothing since. The tem staus 85 to 99 24-7 now. I am checking it daily now, but nothing noi strange noises, etc.
Apparently the new orange coolant has a big expansion/contraction ratio.