I cant get any heat in 95 grand marquis 4.6 engine thermostat change already?
Check for a heater control valve in the upper hose to the heater core, they stick all the time, then see if the air mix door is functioning properly on the heater itself.
If the heater on a 1998 Mercury Grand Marquis keeps heating and does not shut down at the temperature you have selected is there a thermostat that you can change?
follow the top radiator hose to the engine. that is where your thermostat is. you will have to drain the radiator, remove the engine side of the hose and remove the thermostat housing to access it. remove thermostat clean mating surface of housing and engine, install thermostat, install housing, secure radiator hose, fill with coolant. start engine and check for leaks.
What degree of thermostatic in a 1999 mercury grand marquis will work properly with the obd 2 system?
Unlike most cars where the thermostat is on top of engine. The 300 has its thermostat at the bottom of the engine. follow the lower radiator hose from the radiator back to the engine block. It is hooked to the thermostat housing, and of course... the thermostat is just under the housing. Its not easy to change, expect 1-2 hours , on a good day.