[SLCLandShark]

I found this thread extremely helpful! Wanted to add a couple things..

My 95' Coolant Nipple was so eroded that it pretty much crumbled when touched. I had been seeing coolant leak (on and off) for a couple days sometimes more then others. (My car had already had a new water pump replaced. I took it to my mechanic friend and he accidentally discovered the fragile nipple break down. it was easy enough to loosen the belt & move the alternator aside to access the area. we initially had a difficult time removing the old brittle threads that were still inside the lower intake manifold from the nipple. So we took a trip to our local hardware store and purchased the $5.00 Sprinkler system "Nipple Extractor Tool". after getting it to fit snug (used a hammer a little) inside the old threads twisting the tool Counterclockwise they came loose! Purchased the new part from a GM dealership (was nearby) cost was $28.00 (Whoa!) but it's a heavy duty metal one with the "o-ring" ready to install. Hope my 2 cents helps!