Last night, my wife and I had to drive the 325i about 110 miles round trip. Aboult halfway back, I noticed the temp gauge was getting a bit high. After a while, it went almost to the red. So we threw the heater on high, pulled off, and went to the nearest store.
When I pulled the cap off the overflow tank, almost all the coolant drained down. I went in and bought a bottle of coolant and some water, mixed them up, and it was fine the rest of the way home, but once we got back into slower in-town traffic, it started to get a little high again, and is now usually hanging out near the 3/4 mark. The car doesn't have a coolant leak, at least I've never seen any in the driveway. Anyone have any ideas?
When I pulled the cap off the overflow tank, almost all the coolant drained down. I went in and bought a bottle of coolant and some water, mixed them up, and it was fine the rest of the way home, but once we got back into slower in-town traffic, it started to get a little high again, and is now usually hanging out near the 3/4 mark. The car doesn't have a coolant leak, at least I've never seen any in the driveway. Anyone have any ideas?
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