2005 Ford Mustang Engine is overheating when in bumper to b

4.0L Engine

Drain the cooling system.
Remove the air cleaner outlet pipe.
Remove the throttle body.
Remove the 3 upper thermostat housing bolts and position aside the thermostat housing. Discard the thermostat O-ring seal.
Remove the thermostat.

To install:

Installation is the reverse the removal procedure. Please note the following:
A. Install a new thermostat O-ring seal and lubricate with clean engine coolant.
B. Tighten the 2 upper thermostat housing bolts to 89 inch lbs. (10 Nm)

Fill and bleed the cooling system.