I have a 95 F150 with a 5.0, and there is some kind of plug in the side of the Throttle Body that's leaking coolant. Does anybody know what it could be, and if it's posible to replace it? I went to the Ford place, and they said they'd never seen anything like it and told me to replace the entire Throttle Body.

And why is there coolant running through the Throttle Body anyway?

 

If it looks like mine then I have the very same question. Coolant is routed thru this "coolant crossover pipe" on the plenum on my 1999 5.4L engine. That hose continues on back and down the firewall somewhere and I have not figured out where it goes yet.

Step 19 at this link seems to indicate that the coolant sensor may have been moved to a new location in my engine.

Quote: "If the sensor is located in the valley on the driver’s side cylinder head, simply unplug."

Its beginning to sound as if I would have to remove the intake plenum and maybe the upper intake just to get to the coolant temperature sending unit.



http://www.allenengine.com/46-54-truck-install.pdf

 

That's where it's leaking from.