Here's the problem, I have a 98 a4 v6 manual trans FWD. Apparently the radiator is busted and I got a new one at a salvage yard from a 96 a4 v6 manual trans. The upper hose will not connect to the radiator because it is missing the quick disconnect fitting. I bought a new nissen brand radiator off ebay, for a 98 v6 manual trans. This radiator has the same problem, no upper disconnect fitting like the original one in my car, whats going on here???? In the picture, the dirty radiator is the original, notice the fitting. The new one has a place to screw in a hose, but this is not the right connection. I've been out of a car for 2.5 weeks over this ordeal and I need someone who knows what they are doing with these radiators. Thanks in advance to anyone who can help.

 

The new radiators from the audi come with that fitting. You may want to try using some sort of regular hose and some hose clamps.

 

Its because its aftermarket and not OEM

The one you pulled from the junk yard was most likely an aftermarket Cheaper part.