The arrow points to where a steel water transfer pipe sockets into a cast alloy housing which also supports the thermostat above.
(Picture from BBT Jap Parts of Lambton NSW, via Fleabay.)
Is the o-ring seal for that steel pipe, anything unusual like a square profile? I have a modest leak on the Territory’s one, and maybe also the white ute… If it’s a specific Ford part, are they still available? (I’m using 2:1 green coolant which has a knack of finding small leaks.)
