Strange cooling line

never saw it before, it seems to have the function to cool down the the carb, like an air gap, but to make it work correctly, it should be plug at the bottom of the radiator, as like in the pic, when the water reach it, it's already around 200*, so it's way to hot

It is a Ford factory installation, and it has a name. The proper name for that escapes me now (i'll think of it), but was (as said above) a system to influence air/fuel inlet temps.

My father's (formerly Great-Grandfather's) 1966 F-100 had this (352 engine).

I want to say "Thermactor", but I think that was something else...

I think you could just by-pass the carb base and run the heater hose directly from the intake to the heater core. However, in climates like our's, carb icing can occur at temps above freezing. It has a lot to do with air velocity and humidity combining to form ice if I understand it correctly. I know I've had it happen a few times in the past when carbs were more popular. So, for those early spring and fall drives, I'd leave it alone. Just my 2 kronor

Edited by stanman - 19-November-2010 at 12:35AM

2 kronor, thats a good one  I haven't decided yet if I'm going to replace the intake manifold with a aluminium intake (maybe an edelbrock). If I do that I'll take this thing off otherwise I think I let it be.

/Johan

yup it is there to get heat in the carb faster when it is cold.

On my 71 F-250 I junked the old cast iron manifold on the 360, and put on an Edelbrock Performer (#2105). No complaints, very nice manifold.

And it was something like 15 pounds, where as original Ford FE manifolds were 75-85 lbs depending on the manifold.