Yes, Dex should still smell, and taste sweet. If you want to rule out the possibility of an air bubble trapped in the engine, do this: Buy a 6 foot length of 1/2" ID vinyl hose, a new rubber gasket for your thermostat and a new paper gasket for your thermostat. Open the radiator cap when cold and slip the vinyl hose down to the bottom of the radiator. Take an empty, clean gallon jug and set it on the ground in front of the radiator on the passenger side. Get a siphon going by placing the jug end of the hose lower than the bottom of the radiator, then suck on the end of the hose (watch the coolant coming so you don't get it in your mouth)- place the end in the jug and siphon a gallon of coolant. If the jug fills up before the hose stops running, just pull the hose out of the rad to break the siphon. That will lower the coolant enough for what you need to do next and save the coolant for you to re-use. Remove the two 10mm head bolts securing the radiator hose fitting at the thermostat. This is at the engine end of the top radiator hose. Remove the thermostat with the rubber gasket attached and drill a 1/16" or 5/64" hole in the flange of the thermostat near the rubber gasket.
(Here'* one with two 1/16" holes to show you where to drill - you only need one for an air bleed.)
After cleaning up any metal chips, change the rubber gasket. Remove the old paper gasket and clean any sticking gasket material off with a scraper or single edge razor blade. Before re-installing the drilled stat, refill your engine at the thermostat opening
following these instructions: http://www.bonnevilleclub.com/forum/...=article&k=100
If you are still losing coolant after following these directions, you definitely have a leak somewhere.