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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Cooling System - (Except Hybrid)) >> Removal And Installation >> Thermostat Housing - 3.5L >> Removal and Installation

Removal and Installation

WARNING: This page is about a different variant/trim than selected.
  1. Remove the thermostat. For additional information, refer to THERMOSTAT - 3.5L  .
  2. Disconnect the 4 coolant hoses from the thermostat housing and position them aside.
  3. Remove the 2 thermostat housing bolts.
    • To install, tighten to 10 Nm (89 lb-in).
    4. NOTE: Do not pull the other end of the coolant tube out of the engine block when separating the thermostat housing.
  4. Separate the thermostat housing from the coolant tube and remove the thermostat housing.
    • Remove and discard the O-ring seals.
    5. NOTE: Use Motorcraft® Specialty Green Engine Coolant or Motorcraft® Specialty Orange Engine Coolant. Use the same type of coolant that was originally used to fill the cooling system. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.
    NOTE: Motorcraft® Specialty Green Engine Coolant is very sensitive to light. Do NOT allow this product to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes this product to degrade.
  5. To install, reverse the removal procedure.
    • Lubricate the new O-ring seals with clean engine coolant.
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