Ford 2L2Z-8575-AA
Thermostat

Service and repair of the thermostat starts with draining the engine cooling system. You must first remove the air cleaner outlet tube and then disconnect the generator wiring harness pin-type retainer by placing the harness to a side. The first step should be hose disconnecting the upper radiator hose and then unbolting the water outlet adapter and thermostat from their position. Testing of the O-ring seal requires replacement with a new O-ring seal if necessary. Perform the installation by reversing the steps of removal.

Draining the cooling system should be the first step before servicing the thermostat on a 4.0L SOHC engine. First disconnect the air cleaner outlet pipe before removing the throttle body. Disassemble the thermostat housing by removing its upper three bolts before putting it aside while removing the worn O-ring seal. The installation process requires tightening the new thermostat to 10 Nm (89 inch lbs.) while placing a new O-ring seal that needs lubrication with clean engine coolant. Beginning with the removal procedure in the opposite order will allow a.correct installation of the thermostat and proper completion of cooling system fill and bleeding procedures.

The service procedure for the thermostat on a 3.0L (2V) engine starts with draining the cooling system. You should first remove the bolt keeping the throttle body cover in place together with the air cleaner outlet tube. Detach the upper radiator hose from the thermostat outlet housing then take out the alternator wiring pin-type retainer. Remove all bolts and then take away the thermostat outlet housing and thermostat from the engine block. The installation requires nuts to achieve Torque of 25 Nm (18 lb-ft). The process of scraping the thermostat housing-to-gasket interface demands careful attention to prevent damaging aluminum surfaces that could form leaks. You should remove the old gasket while cleaning both mating surfaces until they remain free from all remnants of gasket material. The completion of installation requires you to follow the reverse order of removal steps.

A 3.0L (2V) engine requires service of the thermostat to start with draining the cooling system. Start by taking out the air cleaner outlet tube after which the bolt securing the throttle body cover must also be removed. First detach the upper radiator hose from the thermostat outlet housing followed by the removal of the alternator wiring pin-type retainer. The service process starts with bolt removal then progresses toward removing the thermostat outlet housing together with the thermostat. Installation of the new thermostat requires securing its bolts with a torque of 25 Nm at 18 ft. lbs. Take care while scraping the surfaces between the thermostat housing and gasket to protect aluminum from damage that might result in leak paths. Manifestation of the old gasket must happen before cleaning all sealing surfaces until they show no signs of gasket material. The steps for removal need to be done in reverse order for proper installation.

The service operation for 4.0L SOHC engine's thermostat and thermostat housing begins with draining the engine cooling system. Install the components in the opposite sequence of removal while observing the specified procedures for each component. Follow the direction for assembly when all essential components are removed from the housing. The service requires inspection of the thermostat housing gasket prior to reassembly while installing a brand new gasket if damage is detected. Look for damage in the thermostat housing cover gasket and install a new gasket when needed. Toward the completion of this process you should perform a fill and bleed operation on the cooling system.

Remove the water hose connection, the water thermostat, and the thermostat gasket, then clean and inspect the mating surfaces.

Inspect the O-ring seal.

Reverse the removal procedure.

Install a new O-ring seal if necessary.

Remove the bolts securing the water outlet adapter and the thermostat.

The bolts, water outlet adapter, and thermostat.

Begin by draining the engine cooling system.

Check the gasket for damage.

Inspect the thermostat housing cover gasket.

Begin by draining the cooling system.

Begin by draining the cooling system.

Carefully install the water outlet housing with the thermostat against the head, making sure not to dislodge the thermostat.

Remove the old thermostat and reverse the removal procedure for installation.

Take out the three upper thermostat housing bolts and set the thermostat housing aside.

Reverse the removal procedure and ensure to tighten the thermostat housing cover bolts to 10 Nm (89 inch lbs.).

Ensure to tighten the bolts to 10 Nm (89 lb-in) upon reinstallation.

Ensure to tighten the bolts to 10 Nm (89 inch lbs.).