What's up everyone, long time no see! Finally got around to fixing a couple things on my R that i've been meaning to forever, mainly a power steering leak, and a bad wheel speed sensor. Unfortunately, as I was driving to the DMV, I got a low coolant stop engine warning. I shut it off immediately, and while I was popping the hood/grabbing my coolant I keep in the trunk, I also noticed a small roughly four inch diameter coolant puddle forming under the car. Limped it home, had to stop four more times. The strange thing is, when the message would come on, my res would appear to be low. Then when i'd go to top it up, the res would fill back up when I unscrewed the cap. On my way home, since it had a small leak, it would fill up to a little less then it was before, but it'd still come back up. After doing some poking around in the engine bay, I narrowed it down to the right side, under the airbox/turbo inlet pipe and to the right of the motor. (will update post with pics). After hours of looking around under the hood and taking stuff apart, I finally found where the leak was coming from! Or so I thought! The hose that connects to the drivers side of the radiator, on the other side of that hose going into a metal pipe, the clamp was very loose, and I felt that it was leaking coolant since the bottom was wet and it made sense, since many things below it were covered in coolant as well. I snug the hose onto the pipe, tighten up the clamp, let the car idle for ~30 or so minutes, and no leak! I thought I fixed it, so I went for a drive. I didn't even get half a mile down the road before the coolant low warning came back. Pulled over, popped the hood, sure enough the res was low again, about half an inch below the low mark. When I slowly took the cap off, AGAIN, it filled back up to full, exactly where it was before I drove it. I confirmed it wasn't leaking by checking under the car as well, it doesn't appear that it's leaking, it's just something is causing the coolant to become low when the system is under pressure, and only when I drive. Anyone have any ideas? I'm completely stumped with this.