I have an 02’ 4x4 XLT (4.0L). I recently noticed some build up on an engine part and some hoses, but I can’t seem to figure out what the part is. In the picture I’ve attached, it’s the cylindrical part that has the single bolt in it. It has a small hose attached on top, a larger hose/elbow attached in the middle, and another small hose attached on the bottom. It’s located toward the front left of the motor, under the plastic cover and throttle cables. Could someone please tell me what the name of this part is, what it is supposed to do, and where the buildup on the parts and hoses could possibly be coming from? I realize it will be hard to tell what the problem is just by looking at the picture, but any suggestions would be greatly appreciated.

Attached Images

CA145876-9571-4BEE-B2CF-3ED7EDB800FC.jpg (15.3 KB, 36 views)

is this a 4.0L?

Yes

PCV elbow?

https://www.google.com/search?q=ford...W0AvoQ_AUICygC

Yep, that looks like the elbow. So, is the cylindrical part that the elbow attaches to the pcv valve? Also, are either of the smaller hoses (above/below the bigger elbow hose) coolant hoses? The buildup seems to be coolant, but I’m not sure where the coolant could be coming from.

PCV Elbow
http://www.explorerforum.com/forums/...t-trac.314670/

Lower Thermostat Housing
https://bengrosser.com/howto/fordthermostat/