Can anybody please tell me what the function is of the part pointed out? Just replaced a leaking coolant hose from filler neck to the unit, and the unit itself appears to be leaking coolant. On Megazip it is listed as a "chamber, radiator piping", I also found it listed as a "radiator hose condenser tank", but I can't find anything on it's function. 2002 Mincab.
Thanks Jigs; I got some info when I bought a new one from G&R. Was told it was just a junction box - just a mutual area for coolant to meet and go to different locations on the truck. I was thinking some type of expansion tank too, but most of the expansion tanks I've seen had caps and were easily accessible.