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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 52 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Thermostat Replacement (LY7) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling (L26, LY7 GE 47716 Fill)  or Cooling System Draining and Filling (L26 Static Fill)  or Cooling System Draining and Filling (LY7 Static Fill)  or Cooling System Draining and Filling (LS4 GE47716 Fill)  or Cooling System Draining and Filling (LS4 Static Fill) .
    2. IMPORTANT: Do NOT separate the upper and lower intake manifolds.
  2. Remove the upper intake manifold with the lower intake manifold. Refer to Lower Intake Manifold Replacement .
  3. Disconnect the surge tank hose from the thermostat.
    4. Fig 1: Identifying Coolant Pipe/Thermostat Housing Bolts
    GM1538811Courtesy of GENERAL MOTORS CORP.
  4. Remove the coolant pipe/thermostat housing bolt (1).
  5. Remove the coolant pipe bolt (3).
  6. Remove the coolant inlet pipe from the thermostat housing.
  7. Remove and discard the coolant pipe O-ring seal (2).
    8. Fig 2: View Of Thermostat
    GM1303007Courtesy of GENERAL MOTORS CORP.
  8. Remove the thermostat bolts.
  9. Remove the thermostat and discard the thermostat seal.
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