Thermostat Housing - 3.5L Ti-VCT: Installation

1.

NOTE: Use Motorcraft® Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.

Install a new thermostat housing-to-coolant inlet pipe O-ring seal and lubricate it with clean engine coolant.

2.

Install a new thermostat housing gasket, the thermostat housing and the 2 bolts.

3.

Tighten the 2 thermostat housing bolts in 2 stages
- Stage 1: Tighten to 8 Nm (71 lb-in).
- Stage 2: Tighten an additional 90 degrees.

4.

Connect the 5 coolant hoses to the thermostat housing and position the clamps.

5.

Install the ACL outlet pipe. REFER to Intake Air Distribution and Filtering .

6.

Fill and bleed the cooling system. Refer to Cooling System Draining, Filling and Bleeding .