I have a 98 lincoln town car executive and I need to know how you change the thermostat

1. drain coolant
2. remove engine cover
3. remove the 2 bolts from water hose connection (upper rad hose connecting to)
4. remove o-ring and thermostat
5. If plastic crossover/thermostat housing like original intake manifold,then inspect for cracks if plastic is cracked you need new improved intake with metal crossover/thermostat housing,Dorman 615-178 $200 - $ 270, $700 from dealer plus 700 labor.if not cracked proceed.
6. insert new t-stat spring end down into housing, put on new "O" Ring seal, (NOT Flat seal that may come with t-stat)
7. tighten bolts 12 -to-18 ft/lb torque only or you risk cracking plastic housing making for an expensive intake manifold replacement because a cracked housing WILL LEAK.
8. if you have old style plastic crossover tube/t-stat housing they all will start to leak around 100,000 - 140,000 miles in several places not just at t-stat. there is a extended warrarty to 7 years they all leak at 8- 14 years or mileage above. the leak will be small at first a little odor of burnt coolant and loss of coolant are the clues they will leak at the rear left side at heater hose connection, only cure replace intake manifold. good luck do google search for more info.

1. drain coolant
2. remove engine cover
3. remove the 2 bolts from water hose connection (upper rad hose connecting to)
4. remove o-ring and thermostat
5. repeat in reverse order