It appears to have worked. I downloaded your image and took a closer look at it. I drew an arrow pointing to the piece I think you're talking about. Was I right?
Just below that piece is the water pump. I'm guessing the piece I drew the arrow pointing to comes off the water pump or thermostat housing and then attaches to the heater hose. It might be a junkyard item, or you might be able to find a new one at the local parts store.
Tuesday, November 22nd, 2011 AT 11:17 PM