So irritating and frustrating...
The wet spot on the driveway. Smelling Anti-freeze. Having to refill the overflow tank every few months.
Had to find the problem.
![](https://lh3.ggpht.com/_4xQFBZJE2fI/TIbtG0LNJlI/AAAAAAAAEmI/YNKEtKTeCw8/s640/DSC08162.JPG)
The Toyota thermostat housing 'O' ring where the parts join; upper right quadrant, there was my leak.
Then I looked down...
![](https://lh4.ggpht.com/_4xQFBZJE2fI/TIbtI9tm5AI/AAAAAAAAEmU/-Ye6cq-novs/s512/DSC08165.JPG)
Replacing the timing belt, the radiator was bumped, maybe by a wrench.
Eventually, expansion and contraction opened the hole and,
although the yellow color Amsoil Propylene Glycol Antifreeze and Engine Coolant can stop itsy-bitsy leaks, this became too large.
![](https://lh3.ggpht.com/_4xQFBZJE2fI/TIbtSUMb6fI/AAAAAAAAEnU/2kuRvq_C654/s512/DSC08180.JPG)
Perhaps, the tiny hole in the center tube.
I suppose the moral to the story is; Do the job right and...be careful.