Dont know the part name

1) Drain the cooling system

2) Remove the bolts that secure the thermostat housing to the water pump feed pipe.

3) Remove the feed pipe.

4) Remove the thermostat and retaining sleeve, noting the orientation for installation.

To Install:

1) Install the thermostat and retaining sleeve with the dimple placed into the housing slot.

2) Install the feed pipe that connects the thermostat housing to the water pump.

3) Install the bolt that secures the water pump feed pipe, and tighten the bolt to 18 inch lbs.(10 Nm).

4) Fill the cooling system.

1. Possible air lock in the cooling system, does the internal fan blow hot air? You can blead the system through small bleeding points on the water hoses.

2. Head gasket gone, do the water pipes to the rad expand under pressure?

3. Faulty thermostat. Thermostat controls the amount of water directed to the rad.

4. Not enough anti freeze.

5. Rad cooling fan not starting when supposed to causing overheating. Does the tempture gauge in the dash read normal.
Let me know how it goes.

Thermostat Removal & Installation 2.2L Engine 2004-2005 To Remove:

1. Drain the cooling system.
   
2. Remove the thermostat housing-to-water pump feed pipe bolts.
   
3. Remove the water pump feed pipe from the thermostat housing .
4. Remove the thermostat from the housing.

To Install:

1. Install the thermostat on the housing.
2. Install the water pump feed pipe on the thermostat housing with the mounting bolts. Tighten 89 in-lb (10 Nm).
3. Fill the cooling system.

2006-2007 To Remove:

1. Drain the cooling system.
2. Disconnect the radiator outlet hose from the surge tank and thermostat housing cover. Thermostat & cover
   
3. Remove the mounting bolts and remove the thermostat housing cover.
4. Remove the thermostat from the housing. Discard the O-ring.

To Install:

1. Using a new O-ring, install the thermostat on the housing.
2. Install the thermostat housing cover with the mounting bolts. Tighten 89 in-lb (10 Nm).
3. Connect the radiator outlet hose to the surge tank and thermostat housing cover.
4. Fill the cooling system.

3.5L Engine (LZ4) W/ Variable Valve Timing & 3.9L Engine To Remove:

1. Drain the cooling system.
2. Remove the air cleaner outlet duct.
3. Disconnect the radiator outlet hose from the thermostat housing. Thermostat 3.9L
   
4. Remove the mounting bolt/stud and remove the thermostat housing.
5. Remove the thermostat from the engine.
6. Clean the sealing surfaces.

To Install:

1. Using a new gasket, install the thermostat on the engine.
2. Install the thermostat housing with the mounting bolts. Tighten 89 in-lb (10 Nm).
3. Connect the radiator outlet hose to the thermostat housing.
4. Install the air cleaner outlet duct.
5. Fill the cooling system.
6. Check the cooling system for leaks.

3.5L Engine (LX9) W/O Variable Valve Timing To Remove:

1. Drain the coolant.
2. Disconnect the radiator hose from the thermostat housing. Thermostat 3.5L
   
3. Remove the mounting bolt/stud and remove the thermostat housing.
4. Remove the housing gasket.
5. Remove the thermostat.
6. Clean the mating surfaces.

To Install:

1. Install the thermostat on the engine.
2. Install the thermostat housing and gasket with the mounting bolts. Tighten 18 ft-lb (25 Nm).
3. Connect the radiator hose to the thermostat housing.
4. Fill the cooling system.
5. Check the cooling system for leaks.

1. Diconnect negative battery cable.

2. If the vehicle has an automate transaxle, remove the exhaust manifold before proceeding with the removal and installation of the thermostat.
3. Drain the cooling system. 4. Take out the bolts that hold the water pump feed pipe to the thermostat housing. 5. Lift out the thermostat-housing-to-water-pump feed pipe. 6. Pull out the thermostat. 7. Set the new thermostat in position. 8. Connect the thermostat housing-to-water-pump feed pipe.
9. Set the bolts in place that holds the thermostat-housing-to-water-pump feed pipe. Torque the bolts to 89 inch pounds. 10. Install the exhaust manifold. 11. Refill the cooling system to the proper level with a 50 / 50 mixture of distilled water / DEX Cool approved coolant. 12. Start the engine and check for leaks. 13. Make the necessary adjustments to coolant levels to assure optimum engine performance.

Thermostat Removal & Installation 2.2L Engine To Remove:

1. Remove the exhaust manifold. If equipped with an automatic transmission.
2. Drain the cooling system.
3. Remove or disconnect the following:
   
   
   • Thermostat housing to water pump feed pipe bolts.
     
     
   • Thermostat housing to water pump feed pipe.
   • Thermostat.

To Install:

1. Install or connect the following:
   • Thermostat.
   • Thermostat housing to water pump feed pipe.
   • Thermostat housing to water pump feed pipe bolt.
     1. Tighten bolt to 89 in lbs (10 Nm).
   • Exhaust manifold if equipped with an automatic transmission.
2. Fill the cooling system.

2.4L Engine To Remove:
Thermostat assembly 2.4L

1. Drain the cooling system.
2. Remove the exhaust manifold heat shield.
3. Remove the coolant inlet housing mounting bolts through the exhaust manifold.
4. Raise and safely support the vehicle.
5. Remove the coolant inlet housing stud from the oil pan.
6. Remove wheel and tire assembly.
7. Remove the engine splash shield.
8. Remove the mounting bolts from the transaxle-to-engine block support. Remove the support.
9. Remove the coolant housing pipe.
10. Remove the thermostat.
11. Clean the mating surfaces.

To Install:

1. Install the thermostat.
2. Install the coolant housing pipe.
3. Install and secure the transaxle support-to-engine block mounting bolts.
4. Install the engine splash shield.
5. Install the wheel and tire assembly.
6. Install the coolant inlet housing stud to the oil pan.
   • Tighten to 19 ft lb (26 Nm).
7. Lower the vehicle.
8. Install the coolant inlet housing bolts through the exhaust manifold.
   • Tighten the coolant inlet housing bolts to 10 ft lb (14 Nm).
9. Install the exhaust manifold heat shield.
10. Fill the cooling system.
11. Inspect the system for leaks.

3.4L Engine To Remove:

1. Drain the cooling system.
2. Remove the air cleaner.
3. Remove exhaust crossover pipe.
4. Disconnect the surge tank line fitting from the coolant outlet.
5. Remove the thermostat housing to intake manifold bolts.
6. Remove the thermostat housing outlet and thermostat.

To Install:

1. Install the thermostat and housing outlet.
2. Install the thermostat housing bolts.
   • Tighten the thermostat housing bolts to 18 ft lb (25 Nm).
3. Install exhaust crossover pipe.
4. Connect the surge tank line fitting to the coolant outlet.
   • Tighten the fittings to 15 ft lb (21 Nm).
5. Install the air cleaner.
6. Fill the cooling system.
7. Inspect the system for leaks

from autozone.com

2.2L Engine

1. If equipped with an automatic transaxle, remove the exhaust manifold, as outlined in this section.
2. Drain the cooling system.
3. Remove the thermostat housing to water pump feed pipe bolts.
4. Remove the thermostat housing to water pump feed pipe.
   

1. Fig. Thermostat mounting-2.2L engine
3. Remove the thermostat.
4. 
   

To install:

1. Install the thermostat.
2. Install the thermostat housing to water pump feed pipe.
3. Install the thermostat housing to water pump feed pipe bolt. Tighten the thermostat housing to water pump feed pipe bolt to 89 inch lbs. (10 Nm).
4. If equipped with an automatic transaxle, install the exhaust manifold, as outlined in this section.
5. Fill the cooling system.

3.1L Engines

1. Disconnect the negative battery cable.
2. Drain the cooling system to a level below the thermostat housing.
3. Remove the air cleaner assembly.
4. Disconnect the surge tank line from the thermostat housing.
5. Remove thermostat housing-to-intake manifold attaching bolt and nut, then remove the housing.
6. Remove the thermostat.

To install:

1. Clean all gasket surfaces completely.
2. Insert the thermostat in the intake manifold.
3. Attach the thermostat housing to the intake manifold.
4. Install the mounting bolt and nut. Tighten to 18 ft. lbs. (25 Nm).
5. Install the air cleaner assembly.
6. Connect the surge tank line to thermostat housing.
7. Refill the cooling system.
8. Connect the negative battery cable, remove the radiator cap, then start the engine. Allow the engine to run with radiator cap removed, until the upper radiator hose becomes hot (thermostat open). With the engine idling, add coolant to the radiator until the level is up to the bottom of the filler neck.
9. Install the radiator cap, making sure the arrows line up with the overflow tube.

Removal & Installation 2.2L VIN 4 To Remove:

1. Drain the cooling system.
2. Remove the lower radiator hose from thermostat housing.
3. Remove the thermostat housing bolts and outlet.
4. Remove the thermostat.
5. Clean the mating surfaces.

To Install:

1. Install the thermostat.
2. Install the thermostat housing and bolts.
3. Install the coolant housing bolts. Tighten bolts to 14 Nm (10 ft. lbs.).
4. Install the lower radiator hose to thermostat housing.
5. Fill the cooling system.
6. Inspect for leaks.

2.2L VIN F To Remove:

1. Remove the exhaust manifold. If equipped with an automatic transmission.
2. Drain the cooling system.
3. Remove or disconnect the following:
   
   
   • Thermostat housing to water pump feed pipe bolts.
     
     
   • Thermostat housing to water pump feed pipe.
   • Thermostat.

To Install:

1. Install or connect the following:
   • Thermostat.
   • Thermostat housing to water pump feed pipe.
   • Thermostat housing to water pump feed pipe bolt. Tighten bolt to 10 Nm (18 in. lbs.).
   • Exhaust manifold. If equipped with an automatic transmission.
2. Fill the cooling system.

2.4L VIN T To Remove:

1. Drain the cooling system.
2. Remove the exhaust manifold heat shield bolts and shield.
   
   
   
   
3. Remove the coolant inlet housing bolts.
4. Lift vehicle.
5. Remove the coolant inlet housing stud from the oil pan.
6. Remove the wheel.
7. Remove the right engine splash shield.
8. Remove the transaxle-to-engine block brace bolts and brace.
9. Remove the radiator outlet pipe.
10. Remove the thermostat.
11. Clean the mating surfaces.

To Install:

1. Clean the mating surfaces.
2. Install the thermostat.
3. Install the radiator outlet pipe.
4. Install the transaxle-to-engine block brace and install bolts.
5. Install the right engine splash shield.
6. Install the wheel.
7. Lower the vehicle.
8. Install the exhaust manifold heat shield and bolt.
9. Tighten the exhaust manifold heat shield bolts to 14 Nm (10 ft. lbs.).
10. Fill the cooling system.
11. Inspect the system for leaks.

Alero, Grand Am 1999-2005 Thermostat - Removal & Installation 2.2L Engine

1. If equipped with an automatic transaxle, remove the exhaust manifold, as outlined in this section.
2. Drain the cooling system.
3. Remove the thermostat housing to water pump feed pipe bolts.
4. Remove the thermostat housing to water pump feed pipe.
   
   
   Fig. Thermostat mounting-2.2L engine
   
5. Remove the thermostat.

To install:

1. Install the thermostat.
2. Install the thermostat housing to water pump feed pipe.
3. Install the thermostat housing to water pump feed pipe bolt. Tighten the thermostat housing to water pump feed pipe bolt to 89 inch lbs. (10 Nm).
4. If equipped with an automatic transaxle, install the exhaust manifold, as outlined in this section.
5. Fill the cooling system.

3.1L Engines

1. Disconnect the negative battery cable.
2. Drain the cooling system to a level below the thermostat housing.
3. Remove the air cleaner assembly.
4. Disconnect the surge tank line from the thermostat housing.
5. Remove thermostat housing-to-intake manifold attaching bolt and nut, then remove the housing.
6. Remove the thermostat.

To install:

1. Clean all gasket surfaces completely.
2. Insert the thermostat in the intake manifold.
3. Attach the thermostat housing to the intake manifold.
4. Install the mounting bolt and nut. Tighten to 18 ft. lbs. (25 Nm).
5. Install the air cleaner assembly.
6. Connect the surge tank line to thermostat housing.
7. Refill the cooling system.
8. Connect the negative battery cable, remove the radiator cap, then start the engine. Allow the engine to run with radiator cap removed, until the upper radiator hose becomes hot (thermostat open). With the engine idling, add coolant to the radiator until the level is up to the bottom of the filler neck.
9. Install the radiator cap, making sure the arrows line up with the overflow tube.

3.4L Engine

1. Drain the cooling system.
2. Remove the air cleaner.
3. Remove exhaust crossover pipe.
4. Disconnect the surge tank line fitting from the coolant outlet.
5. Remove the thermostat housing to intake manifold bolts.
6. Remove the thermostat housing outlet and thermostat
7. Clean the mating surfaces.

To install:

1. Install the thermostat and housing outlet.
2. Install the thermostat housing bolts. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
3. Install exhaust crossover pipe.
4. Connect the surge tank line fitting to the coolant outlet. Tighten the fittings to 15 ft. lbs. (21 Nm).
5. Install the air cleaner.
6. Fill the cooling system.
7. Inspect the system for leaks.

Hope this help (remember comment and rated this).

FACEING the ENGINE It is At TOP RIGHT SIDE Close to Master Cylinder takes About 1 hour to Replace Have Fun its a EASY One
Please Dont forget to RATE ME Thank You

1. Drain the cooling system.
2. Remove the bolts that secure the thermostat housing to the water pump feed pipe.

Remove the feed pipe

1. Remove the thermostat and retaining sleeve, noting the orientation for installation.

Installation Procedure
Install the thermostat and retaining sleeve with the dimple placed into the housing slotImportant: Lubricate the O-ring with soapy water or coolant before installing the O-ring in the water pump.

1. Install the feed pipe that connects the thermostat housing to the water pump.Notice: Refer to Fastener Notice in Service Precautions.
   
   
   1. Install the bolt that secures the water pump feed pipe.
   • Tighten the bolt to 10 Nm (18 inch lbs.) .
   1. Fill the cooling system.

there are three hoses leading to the water pump. the biggest one oviously goes to the thermostat housing, but the other two are much smaller 1 inch hoses, one of wich goes on the water pump and the other on the thermostat housing. if you follow the hoses one will connect to the upper part of the overflow for the radiator after hitting a T in the lines, that hose connects to the thermostat housing, and the other goes to the water pump its self.