its located on the top front of the block there is a metal pipe connected by two bolts. remove the two bolts and it is right at the end of the metal elbow.
ON THE TOP OF THE ENGINE WHERE THE UPPER RADIATOR HOUSE CONNECTS...
Should be in a removable housing at the engine end of the upper radiator hose
On a 2001 Mercury Cougar : The radiator is located in the engine compartment , at the front of the vehicle
Follow the upper radiator hose to engine--should be located in housing that hose connects too.
Follow the upper radiator hose to the front of the engine. the radiator hose will end up connecting to a metal hose that is attached to the engine. there it is under it.
The Mercury Cougar blower motor is located on the firewall in the engine compartment. The blower motor can be seen on the passenger side of the firewall.
front of engine at top on right side facing engine
The positive crankcase ventilation valve on a 2002 Mercury Cougar is located on top of the engine; in the valve cover. It removes harmful fumes from the engine.
where the upper rad hose meets the engine
For a 1999 Mercury Cougar : In the Power Distribution Box ( which is " live " ) located in the engine compartment ( on the drivers side of the engine compartment ) ( relay R1 is the fuel pump relay )
The thermostat at the engine in a 2000 Mercury Villager is located Êon the right passenger side near the middle. You should look for the jiggle valve on the thermostat that should be facing up.
The thermostat for a 1999 Mercury Mystique is inside of the top water inlet. Remove the top radiator hose from the engine, and then inlet can be removed to get to the thermostat.