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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Repair Instructions >> Engine Coolant Thermostat Housing Replacement (1.8L LUW and LWE) >> Installation Procedure

Installation Procedure

  1. Clean sealing surface.
  2. Install a NEW engine coolant thermostat housing seal (8).
    Fig 1: Identifying Engine Coolant Temperature Sensor Connector, Engine Oil Cooler Pipe And Thermostat Housing
    GM2028128Courtesy of GENERAL MOTORS COMPANY
  3. Install the engine coolant thermostat housing (2).
  4. Install the 4 engine coolant thermostat housing bolts (3) and tighten to 2 N.m (18 lb in).
    CAUTION: Refer to Fastener Caution .
    NOTE: Partially install the 4 bolts until the engine coolant thermostat housing is in contact with the cylinder head.
  5. Tighten the 4 engine coolant thermostat housing bolts to 8 N.m (71 lb in) in sequence (1-2-3-4).
    Fig 2: Identifying Engine Coolant Thermostat Housing Bolts Tightening Sequence
    GM2028129Courtesy of GENERAL MOTORS COMPANY
    CAUTION: Following the proper fastener tightening sequence and torque is essential. Failure to do so may fracture the thermostat housing.
  6. Install NEW engine oil cooler pipe seals (4, 7).
    Fig 3: Identifying Engine Coolant Temperature Sensor Connector, Engine Oil Cooler Pipe And Thermostat Housing
    GM2028128Courtesy of GENERAL MOTORS COMPANY
  7. Install the engine oil cooler pipe (5).
    NOTE: Push the engine oil cooler pipe into the engine oil cooler.
  8. Install the 2 engine oil cooler pipe bolts (6) and tighten to 8 N.m (71 lb in).
  9. Install the heater inlet hose to the engine coolant thermostat housing. Refer to Heater Inlet Hose Replacement (1.8L LUW and LWE) .
  10. Install the heater outlet hose to the engine coolant thermostat housing. Refer to Heater Outlet Hose Replacement (1.8L LUW) and Heater Outlet Hose Replacement (1.8L LWE) .
  11. Connect the engine coolant temperature sensor connector (1).
  12. Install the engine coolant thermostat housing bracket.
  13. Install the engine coolant thermostat housing bracket nut and tighten to 6 N.m (53 lb in).
  14. Install the throttle body heater inlet hose (2) to the engine coolant thermostat housing (1).
    Fig 4: Engine Coolant Thermostat Housing, Throttle Body & Heater Inlet Hose
    GM2027531Courtesy of GENERAL MOTORS COMPANY
  15. Install the radiator inlet hose (3) with the radiator inlet hose clamp (2) to the engine coolant thermostat (1).
    Fig 5: Radiator Inlet Hose And Clamp
    GM2652379Courtesy of GENERAL MOTORS COMPANY
  16. Lower the vehicle.
  17. Fill the cooling system. Refer to Cooling System Draining and Filling (GE-47716 Fill)  and Cooling System Draining and Filling (Static Fill) .
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