How do you replace the thermostat on a 1992 Oldsmobile cutlass ciera?

Very tricky indeed ! Without the proper tools don't try it ! Remove the air filter housing. With the right tools you can now get to the 2 t-stat housing bolts. Remove the bolts and slide it out. Remove old t-stat and install new one(taking care to make sure it is positioned the correct way), re-install using gasket sealer !!! Note: easier said than done !