URO coolant transfer pipe - can't seat o-ring

[VW-Fritzi]

I'm in the middle of installing the URO collapsible coolant transfer pipe on my N62TU, but I can't seem to get the rubber o-ring that comes with the kit fully seated in the groove at the timing cover side.


I coated it with the silicone grease that comes with the kit, and made sure it is in the proper orientation with the flat side facing the front of the car. But when I get it in there, there is still a minuscule lip sticking up above the metal, which is just enough to prevent the new transfer pipe for pushing all the way in.


I've tried applying pressure by running the smooth side of a straight pick tool and a plastic trim removal tool around the edge, but no matter how much force I put on it, it won't fit any further in, so I can't get it flush with the metal.


Anyone else run into this problem? I contacted URO, but they just said to do what I've already tried.