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Removal & Installation: Thermostat: Installation

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  1. Clean the coolant outlet elbow and cylinder head gasket surfaces.
  2. Coat a new gasket with Perfect Seal Sealing Compound B5A-19554-A or D7AZ-19554-BA (ESR-M18P2-A and ESE-M4G115-A) or equivalent.
  3. Position the gasket on the cylinder head opening. The gasket must be positioned on the cylinder head before the thermostat is installed.
  4. The coolant outlet elbow contains a locking recess into which the water thermostat is turned and locked. Install the water thermostat with pellet side out.
  5. Turn the water thermostat clockwise to lock it in position on the flats cast into the outlet elbow.
  6. Position the coolant outlet elbow against the cylinder head. Install and tighten the attaching bolts to 16-24N-m (12-18 lb-ft).
  7. Fill and bleed the cooling system as described in this section.
  8. WARNING: DO NOT STAND IN LINE WITH OR NEAR RADIATOR FAN BLADE (8600) WHEN ENGINE IS RUNNING.
  9. Check for leaks and proper coolant level after the engine has reached normal operating temperatures.
Fig 1: Removing/Installing Thermostat
G00490063Courtesy of FORD MOTOR CO.