I want to remove the system from the house which will necessitate the disconnection of the refrigerant pipes between the external inverter and the internal head. I presume I will lose all refrigerant etc are there any pitfalls to watch for and what is the process for reconnection by a technician

the clutch master cylinder is on the fire wall at the pedal. The slave cylinder is on the gear box bell housing and in some cars it is now inside the bell housing which necessitates the gearbox removal to replace it.. Removal of an external cylinder is to loosen the hose fitting ,unbolt the slave cylinder and then un-csrew the cylinder off the hose

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.

Thermostat Removal & Installation 3.4L & 3.5L Engine To Remove:

1. Drain the coolant below the level of the thermostat.
2. Remove the air cleaner and duct assembly.
3. Remove the exhaust crossover pipe.
4. Disconnect the radiator hose from the thermostat housing.
   
   
5. Remove the mounting bolts and remove the thermostat housing.
6. Remove the housing gasket.
7. Remove the thermostat.
8. Clean the mating surfaces.

To Install:

1. Install the thermostat on the engine. NOTE: Apply RTV sealer to the thermostat housing bolt threads.
   
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. Install the exhaust crossover pipe.
5. Install the air cleaner and duct assembly.
6. Fill the cooling system.
7. Check the cooling system for leaks.

3.6L Engine To Remove:

1. Remove the air cleaner.
2. Remove the throttle body.
3. Remove the heater pipes.
4. Remove the coolant inlet pipe. Thermostat 3.6L
   
   
5. Remove the thermostat mounting bolts and remove the thermostat.
6. Clean the thermostat and heater pipe mating surfaces.

To Install:

1. Place the thermostat in the housing with a new gasket.
2. Install the thermostat and gasket on the engine with the mounting bolts. Tighten 89 in-lb (10 Nm).
3. Install the coolant inlet pipe.
4. Install the heater pipes.
5. Install the throttle body.
6. Install the air cleaner.
7. Fill the cooling system and perform a leak test.

Not sure which engine you have so please pick the appropriate engine:

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.
   

Thermostat mounting-2.2L engine


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.
   

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.
   

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.

Thermostat Removal & Installation 3.4L & 3.5L Engine To Remove:

1. Drain the coolant below the level of the thermostat.
2. Remove the air cleaner and duct assembly.
3. Remove the exhaust crossover pipe.
4. Disconnect the radiator hose from the thermostat housing.
   
   
5. Remove the mounting bolts and remove the thermostat housing.
6. Remove the housing gasket.
7. Remove the thermostat.
8. Clean the mating surfaces.

To Install:

1. Install the thermostat on the engine. NOTE: Apply RTV sealer to the thermostat housing bolt threads.
   
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. Install the exhaust crossover pipe.
5. Install the air cleaner and duct assembly.
6. Fill the cooling system.
7. Check the cooling system for leaks.

3.6L Engine To Remove:

1. Remove the air cleaner.
2. Remove the throttle body.
3. Remove the heater pipes.
4. Remove the coolant inlet pipe. Thermostat 3.6L
   
   
5. Remove the thermostat mounting bolts and remove the thermostat.
6. Clean the thermostat and heater pipe mating surfaces.

To Install:

1. Place the thermostat in the housing with a new gasket.
2. Install the thermostat and gasket on the engine with the mounting bolts. Tighten 89 in-lb (10 Nm).
3. Install the coolant inlet pipe.
4. Install the heater pipes.
5. Install the throttle body.
6. Install the air cleaner.
7. Fill the cooling system and perform a leak test.

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).

Here are the instructions from chiltons.

Removal & Installation

1. Disconnect negative battery cable.
   
2. Drain cooling system below thermostat housing level.
   
3. Remove thermostat.
   
4. Disconnect engine coolant temperature sensor.
   
5. Disconnect heater supply hose.
   
6. Turbocharger equipped vehicles:
   
   • Recover the refrigerant from the refrigerant system.
     
   • Disconnect A/C suction line from A/C compressor.
     
7. Remove housing attaching bolts.
   
8. Remove housing and gasket.
   

To install:

1. Clean all gasket sealing surfaces.
   
2. Install gasket and housing. Tighten bolts to 20 ft. lbs. (28 Nm).
   
3. Turbocharger equipped vehicles:
   
   • Connect A/C suction line to A/C compressor.
     
   • Evacuate the refrigerant system.
     
   • Charge the refrigerant system.
     
4. Connect heater supply hose.
   
5. Connect engine coolant temperature sensor.
   
6. Install thermostat.
   
7. Fill cooling system.
   
8. Connect negative battery cable.
   

Please do not hesitate to ask further questions about your vehicle.
please do not forget to rate and comment about your experience with fixya.

First thing, MOST IMPORTANT!
Has the system been emptied?
If it hasn't, then don't touch it. The refrigerant is under great pressure and you can cause yourself injury AND get a big fine for venting refrigerant gas into the atmosphere.
1. Evacuate system
2. Remove pulley
3. Disconnect refrigeration pipes and seal all ends, pipes plus pump
4. Disconnect the electrics
5. Remove fixings
6. Remove pump