1999 Expedition 5.4 EB. I notice some coolant leaking under the car; upon inspection, I found this leak by the manifold where a hose attaches to a metal tube. The hose appears to be in good shape and the leak appears to be on the rusted angled metal tube (red arrow).
My question is, what is the name of the part with tubes where the hoses attach? (yellow arrow). I appear it could be the big hose assembly with 2 tubes where the smaller hoses attach (green area).
How do I remove the part? does it attach to the manifold? Is it just a pressure fit? The video shows the leak; would this be a candidate for JB weld? Thanks in advance for your help.

 

I understand that this part of the throttle elbow. What I need to know is if I can get just the part in the red frame without having the buy the entire throttle elbow assembly. Looks like the tubing with the right-angle screws into the round assembly; perhaps just this tubing is available?
The other option is to sand the tubing with the hole clean and use JB weld to temporarily patch the hole. The cooling system works at 16 psi which is not really high.

 

Bump

 

Update: I checked the JB Weld and they did not think any of their products would be effective; they suggested cutting the right-angle tubbing and attaching the hose there with worm clamp. since pushing a straight hose around the right-angle tubing might weaken the tubbing.
I found a part that is a piece of coolant hose with a 90-degree bend. I cut apiece of it, slid it over the 90-degree tubing using a little bit of lubrication and used worm clamps to fasten the hose to the tubing. Seem s to be holding fine so far.

 

The part you identified is a heater for the throttle body. Ford blew it on this part. If it goes bad coolant can be injected straight into the lower intake manifold assembly and eventually into the cylinders. I have now seen it on two 1998 Exhibitions. Best thing for you to do is remove the two coolant lines and join both together. Then put caps on the two ports that the coolant lines were hooked to. It is not fun to find coolant on the top of the pistons and then wonder if the engine is ruined.

 

The repair with the right angle hose, as shown in previous post, seems to be holding just fine. The leak has been effectively fixed, there is no coolant leaking and the area is dry.

 

I guess I should have explained more. The vacuum line tube runs through this part and then into the throttle body. The outer body of this part is just a shell, ie hollow inside. The vacuum tube is sealed on both ends of the part, thereby creating a path for coolant to flow around the vacuum tube and heating the incoming air being sucked into the throttle body. Here's the possible issue. Should the vacuum tube located inside this part rust enough to create a hole then coolant will be sucked into the throttle body. In addition, the pressure on the coolant system will force coolant into the throttle body. Another bad condition is even after turning off the engine the coolant system will force coolant into the lower intake manifold assembly until all pressure is reduced to zero.
In one instance a fresh rebuilt engine ran a short time before steam poured out of the exhaust pipes. On teardown of the engine found close to one gallon of coolant in the lower intake manifold assembly ( ie the plastic section fastened to the bottom of the aluminum intake). Coolant was sucked into the cylinders. To get the coolant off the pistons a suction hose was inserted thru the sparkplug hole and sucked most of the coolant out. The repair was both costly and time consuming. Coolant was in the oil pan which meant an oil and filter change. My opinion is the exposure for a leak inside this part is far too great to leave hooked up per factory settings. I don't think all Expeditions had this setup as I saw one recently without it. Its vacuum tube ran straight into the throttle body. Hope this explains it better.