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First thing to check when the engine is cold is that if there is enough antifreeze in the radiator and after you run the engine for about 5/10 minuter check both the rad hoses to see if they are both at the same temperature, if the return hose which is the bottom one is cold then replace the thermostat. If both hoses are hot or same temp then make sure the radiator fan comes on?
remove the mounting bolts on the top of the rad shroud, remove lower rad line and drain into a bucket. remove upper rad line by loosening the hose clamp the using a box wrench remove all other coolant lines running to the rad, you should then be able to lift the rad up and out. Remember to use a rag to plug all of the lines that have been removed.
remove the upper rad. support housing remove upper and lower rad hoses sometimes your trans cooling lines are in the left side of the radiator you'll need to disconnect these lines don't loose your o-ring for these lines radiator should lift out its a messy job replace all fluids lost after reassembly
Remove the fan shroud by disconnecting the two upper hoses and removing the two
8mm bolts that secure the shroud. Remove the four 8mm bolts that secure the rad
to the rad support. Remove all the plastic pushpins that retain the site shield.
Lift up site shield for access to the pushpins that secure the main battery
positive cable. Tilt rad toward the front of the truck to give you the clearance
needed to pull the shroud out. Disconnect the lower rad hose and the two
transmission fluid cooler lines (on 2005 and up models, you'll need the line
release tool). Once done, the rad simply lifts up and out with plenty of room to
Follow the upper radiator hose to the point where it meets the thermostat housing at the front of the intake manifold. Loosen the hose clamp and pull the radiator hose off of the thermostat housing, then repeat to remove the other end from the radiator
This is a common problem with the Taurus. You have an air lock in the system. You need drain the rad and open the cooling system at the highest point. This is usually the upper hose on the heater core.Fill the rad very slowly until the coolant comes out of the upper hose connection. Once done run the car with the hose reconnected and the rad cap off.Put a container under the rad filler.Run the car until it comes up to temp.Slowing top off the rad with the car still running. This should do it.
Remove the rad support cover, remove the electric cooling fan and shroud, disconnect the tranny cooler lines, drain the cooling system, remove the upper and lower hoses, remove the rad brackets on top of the rad (one on each side), have someone hold the AC core out of the way and carefully slide the radiator up and out