Engine Coolant Thermostat Replacement. Cadillac Concours 1996

For 1990-2009 cars

### Removal Procedure

1. Drain the coolant to a level below the thermostat housing. Refer to Cooling System Draining and Filling .
2. Remove the headlamp cover panel. Refer to Headlamp Replacement in Body Front End.
3. Remove the air cleaner assembly.
4. Remove the 2 bolts securing the thermostat housing to the coolant pump inlet.
5. Remove the thermostat and the o-ring from the thermostat housing.

### Installation Procedure

1. Install the thermostat and the new o-ring into the coolant pump housing.
2. Install the thermostat housing.
3. Install the 2 thermostat housing bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the air cleaner assembly.
5. Install the headlamp cover panel. Refer to Headlamp Replacement in Body Front End.
6. Refill the coolant. Refer to Cooling System Draining and Filling .