"tobybul" wrote in news: snipped-for-privacy@localhost.talkaboutautos.com:
Dave, am curious if u ever found leak. I have almost same problem with
> my Taurus. But mine leaks year round. No drippings on floor. Engine
> runs fine. No residue in dip stick. All hoses look tight and good. >
> I smell coolant only when stopped (engine running) after driving a few
> minutes. Replaced radiator already. Dealer and another garage cannot
> find leak. System pressure test holds.
>
> Did get it too stop one time after I put Bars Stop Leak but I flushed
> it out later cuz I dont like the idea of having that in my coolant.
> This is b4 I replaced Rad.
>
> Help!
>
I had similar problem with a 99 Taurus. Turned out to be a hair line crack in the header/overflow tank. The shop I went to was about ready to replace the engine, they suspected a cracked block as they could find no external trace of a leak. Then one of the older mechanics noticed that the overflow tank had a slightly whitened appearnce at the pint where the plasic mounting met the rest of the tank. Pressure testing did not cause a leak, but vibration and pressure would. solution relaced tank, problem gone.