Approximately three months ago replaced the thermostat, gasket, temp sender.
Here is the link concerning the how/why:
Requesting help with Coolant issue - JeepForum.com
After replacing the thermostat, gasket, temp sender I noticed intermittently at 1st and then with more regularity that I was getting an antifreeze smell in the jeep with the heater blowing. I also would get the strong sweet smell when standing next to the engine bay with the hood down and engine running.
It also so seemed to be Air Temperature dependent too.
As the ambient Air Temperature rose outside the smell would get stronger and colder temperatures would show less smell.
Approximately 1 1/2 months ago did a search of this and other forums and chose to put dye in the system.
Found that the housing where the thermostat gasket/housing is bolted to the block is/was leaking and replaced the gasket. Also, replaced the upper radiator hose clamps.
Waited and retested....
Same difficulty...Replaced gasket and cleaned all surfaces. Still weeping.
Redid it again and put a new thermostat and gasket in and cleaned it again.
Just went out tonight to check on it after running the jeep for a week and it is still showing small drips right under the housing.
It is very small drip/drip/drip/drip spot/s in a consistent pattern with a hazy powder behind it.
It is not excessive dripping/running or pouring out. It seem to be when under pressure and always at the bottom side furthest away from the mounting hardware (i.e. bolts).
What to do?
This thing is driving me nuts!
It just makes NO sense.... The gasket is new...the T-stat is new... The housing and block are clean (i.e. razor blade and scouring pad)....