Chevrolet Sonic Repair Manual: Engine Coolant Thermostat Housing Installation

Caution:

Refer to Engine Coolant Thermostat Housing Caution.

1. Clean sealing surface.
2. Install a NEW engine coolant thermostat housing seal.


3. Install the engine coolant thermostat housing (2).

Caution:

Refer to Fastener Caution.

Note:

Screw in the 4 bolts until the engine coolant thermostat housing is in contact with the cylinder head.

4. Install the 4 engine coolant thermostat housing bolts (3) and tighten to 2 Y (18 lb in)

   .





Caution:

Following the proper fastener tightening sequence and torque is essential. Failure to do so may fracture the thermostat housing.

5. Tighten the 4 engine coolant thermostat housing bolts to 8 Y (71 lb in)

   in sequence (1?E?E?E).




6. Install the engine coolant thermostat housing retainer (1).
7. Install the engine coolant thermostat housing retainer nut (4) and tighten to 6 Y (53 lb in)

   .