I can't seem to find the source of a coolant leak. It only leaks out the amount in the resevoir. It doesn't lose any more than that and doesn't overheat. It's on the passenger side of the car. It doesn't leak out right away but after driving for a while. Already took it to one mechanic and they couldn't find a leak said it was probably the A/C. I know they're on crack since I filled the tank to the line and it's empty a couple of hours later. This is on a 2000 ZTS.