For 1990-2009 cars

## Engine Coolant Thermostat Replacement 3.4L

### Removal Procedure

1. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement .
2. Remove the thermostat.
3. Clean the mating surfaces.

### Installation Procedure

1. Install the thermostat.
2. Install the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement .
3. Inspect the system for leaks.

## Engine Coolant Thermostat Replacement 2.4L

### Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the exhaust manifold heat shield.
3. Remove the coolant inlet housing bolts through the exhaust manifold.
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
5. Remove the coolant inlet housing stud from the oil pan.
6. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
7. Remove the engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
8. Remove the bolts from the transaxle-to-engine block brace. Remove the brace.
9. Remove the coolant housing pipe.
10. Remove the thermostat.
11. Clean the mating surfaces.

### Installation Procedure

1. Install the thermostat.
2. Install the coolant housing pipe.
3. Install the transaxle-to-engine block brace and secure with the bolts.
4. Install the engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
5. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

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.

6. Install the coolant inlet housing stud to the oil pan.

Tighten
Tighten the coolant inlet housing stud to 26 N·m (19 lb ft).

7. Lower the vehicle.
8. Install the coolant inlet housing bolts through the exhaust manifold.

Tighten
Tighten the coolant inlet housing bolt to 14 N·m (10 lb ft).

9. Install the exhaust manifold heat shield.
10. Fill the cooling system. Refer to Cooling System Draining and Filling .
11. Inspect the system for leaks.