Hi All,
there's been many posts about coolant loss of the invisible kind from the 4.4 V8's, so I thought I'd just add this from my own car - two pictures showing the leak from the LPG Tee hose which look as as if its going porous on me and the main manifold leak due to the jubillee clip - new hoses on order. The bellhousing on the passanger side shows staining so this has been going on for a while, masked by the Header cap which was leaking due to the seal on the underside.
Hope this helps anyone suffering from the same.

I'd get rid of those plastic "T"s as well, they go brittle and snap when a few years old... replace them with some nice brass ones from here...

Water Hoses and Fittings

And I always use proper branded Jubilee clips as they are far superior to most of the cheap Chinese stuff out there....

Also No need for them to be so tight that they crush the hose, common mistake with jubilee clips I would say