| Several year ago, with my other Z, I had a problem very close to this one. Everytime I drove it, a glass of water low. I never could find a leak so I just dealt with it. After a couple of weeks of dealing with it. I pulled into the garage to change the oil after a drive and there was a bit of water on the ground on the right side. It was my overflow tank. It was filled to the top. After some searching, I found the rubber overflow hose had a small crack in it. There's what happens. When you run the car withyour radiator fills. The expansion of the water will push the excess to the overflow. When he water cools in the motor a slight vacuum will pull the water back into the radiator. If there is a small crack in that hose, it will push the water out but not be able to make a vacuum to pull it back. I replaced that hose and the issue went away. Give that a look. Also, when I was dealing with the issue. I found that even over a couple of days it would never get lower than a water glass full low. I hope this gives you an unconventional idea of what to look at.
 |
