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Engine Coolant Thermostat Housing Installation

WARNING: This page is about a different variant/trim than selected.
  1. Clean sealing surface.
    CAUTION: Refer to Engine Coolant Thermostat Housing Caution .
  2. Install a NEW engine coolant thermostat housing seal.
  3. Install the engine coolant thermostat housing (2).
    Fig 1: Engine Coolant Thermostat Housing
    GM2026832Courtesy of GENERAL MOTORS COMPANY
  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: Screw in 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 the engine coolant thermostat housing retainer (1).
    Fig 3: Engine Coolant Thermostat Housing
    GM2026832Courtesy of GENERAL MOTORS COMPANY
  7. Install the engine coolant thermostat housing retainer nut (4) and tighten to 6 N.m (53 lb in).
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