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Thermostat Where can i find the thermostat in the engin

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  • Audi Master
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You must to remove the timing belt to get to the engine thermostat.
The termostat is located behind the timing cover.
Acessing the termostat is not an easy tast, as you have to remove the timing belt to get at it.

If instead you are talking about the radiator fan termic switch, you find it mounted on radiator, where fun wirings get plugged in.

Regards

Posted on Aug 29, 2008

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Hello jonah! i need to replace a thermostat on my 2004 chevy colorado, 3.5 litre engine can you tell me where it is located on my engine?


Check this procedure for Canyon, Colorado 2004-2005 - Removal & Installation
  1. Drain the cooling system.
  2. Raise and support the vehicle only high enough to access the thermostat housing through the wheelhouse.
  3. Remove the left wheelhouse liner.
  4. Remove the radiator inlet hose from the thermostat housing.
  5. Remove the thermostat housing bolts.
  6. Remove the thermostat housing from the engine block.
  7. Clean and inspect the thermostat housing.
  8. Clean and inspect the sealing surface of the engine block.
To install:
  1. Position the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Connect the radiator inlet hose to the thermostat housing.
  4. Install the left wheelhouse liner.
  5. Lower the vehicle.
  6. Fill the cooling system.
  7. Inspect all sealing surfaces for leaks after starting the engine.
  1. Drain the cooling system.
  2. Raise and support the vehicle only high enough to access the thermostat housing through the wheelhouse.
  3. Remove the left wheelhouse liner.
  4. Position the hose clamp pliers to the clamp to remove the radiator inlet hose from the thermostat housing.
  5. Remove the thermostat housing bolts.
  6. Remove the thermostat housing from the engine block.
  7. Clean and inspect the thermostat housing.
  8. Clean and inspect the sealing surface of the engine block.
To install:
  1. Position the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Connect the radiator inlet hose to the thermostat housing.
  4. Install the left wheelhouse liner.
  5. Lower the vehicle.
  6. Fill the cooling system.
  7. Inspect all sealing surfaces for leaks after starting the engine.
Hope helps (remember to rating this answer).

Oct 06, 2011 | 2004 Chevrolet Colorado

3 Answers

1997 Cirrus is still overheating... The heater does not blow out hot air...would the heater core cause the vehicle to overheat? if not, what other problems am I looking for, I was loosing anti freeze...


it appears that you have a large air pocket/low on coolant. The engine is getting hot due to the lack of coolant but there is no heat because nothing is flowing through the core.

Feb 20, 2011 | Chrysler Cirrus Cars & Trucks

2 Answers

How to replace a themostat on a 2004 Gmc Envoy


Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat .

Specific instructions for your car are as follows. Let me know if you get stuck or have more questions.


Removal & Installation


4.2L Engine

  1. Remove the necessary coolant from the radiator.
  2. Remove the alternator, as outlined in the Engine Electrical Section.
  3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
  4. Remove the thermostat housing bolts.
  5. Remove the thermostat housing from the engine block.
  6. Clean all of the surfaces of the thermostat housing.
  7. Clean the sealing surface of the engine block.
To install:
  1. Install the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
  5. Install the alternator.
  6. Fill the cooling system with specified coolant and concentration.
  7. Inspect all sealing surfaces for leaks after starting the engine.

5.3L Engine
NOTE The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.


  1. Drain the cooling system to a level below the thermostat.
  2. Remove the radiator outlet hose.
  3. Remove the water pump inlet bolts.
  4. Remove the water pump inlet and thermostat from the water pump.

To install:
  1. Install the thermostat and thermostat housing to the water pump.
  2. Install the thermostat housing bolts. Tighten the bolts to 11 ft. lbs. (15 Nm).
  3. Install the radiator outlet hose.
  4. Properly fill the engine cooling system and check for leaks.

Oct 08, 2010 | 2004 GMC Envoy

1 Answer

How to install thermastat in 1500 chevy pickup 1994


REMOVAL & INSTALLATION
Gasoline Engines
CAUTION
Never open, service or drain the radiator or
cooling system when hot; serious burns can occur from the steam and hot coolant.
Also, when draining engine coolant, keep in mind that cats and dogs are
attracted to ethylene glycol antifreeze and could drink any that is left in an
uncovered container or in puddles on the ground. This will prove fatal in
sufficient quantities. Always drain coolant into a sealable container. Coolant
should be reused unless it is contaminated or is several years old.

  1. Drain the radiator until the coolant is below the thermostat level (below
    the level of the intake manifold).
  2. Remove the water outlet elbow assembly from the engine. Remove the
    thermostat from the engine, or, on the 4.8L, from inside the adapter elbow.
    To install:

  3. Clean the gasket surfaces on the water outlet elbow and the intake manifold.
    Use a new gasket when installing the elbow to the manifold.
  4. Install the new thermostat making sure the spring side is inserted into the
    engine, or, on the 4.8L, downward into the thermostat housing. Tighten the
    thermostat housing bolts to 20 ft. lbs. (28 Nm). On the 4.3L, 5.0L, 5.7L tighten
    the studs to 21 ft. lbs. (28 Nm). On the 7.4L tighten the bolts to 27 ft. lbs.
    (37 Nm).
  5. Refill the cooling system. Start the engine and check for leaks.





    Fig. 1: Remove the thermostat housing bolts
    87983p35.jpg






    Fig. 2: Remove the thermostat housing from the engine
    87983p36.jpg






    Fig. 3: Remove the thermostat from the housing
    87983p37.jpg






    Fig. 4: Thermostat housing - 4.3L engines
    84903085.gif






    Fig. 5: Thermostat housing - 4.8L engines
    84903086.gif






    Fig. 6: Thermostat housing - 5.0L and 5.7L engines
    84903087.gif






    Fig. 7: Thermostat housing - 7.4L engines, R/V series
    84903088.gif






    Fig. 8: Thermostat housing - 7.4L engines C/K series
    84903089.gif


Diesel Engines
1988-95 MODELS

  1. Remove the upper fan shroud.
  2. Drain the cooling system to a point below the thermostat.





    Fig. 9: Thermostat housing - 6.2L engines, R/V series
    84903090.gif






    Fig. 10: Thermostat housing - 6.2L and 6.5L diesel engines -
    1988-95 C/K series
    84903091.gif



  3. Remove the engine oil dipstick tube brace and the oil fill brace.
  4. Remove the upper radiator hose.
  5. Remove the water outlet.
  6. Remove the thermostat and gasket.
  7. Installation is the reverse of removal.
  8. Use a new gasket coated with sealer, Make sure that the spring end of the
    thermostat is in the engine. Tighten the bolts to 35 ft. lbs. (47 Nm) on 1988-91
    models and 31 ft. lbs. (42 Nm) on 1992-95 models.

1996-98 MODELS

  1. Drain the cooling system to a point below the thermostat.
  2. Disconnect the upper radiator (inlet) hose from the thermostat outlet.
  3. Ufasten the thermostat housing bolt and stud, then remove the housing.
  4. Remove the gasket and the thermostat.
  5. Clean any remaining gasket from the thermostat hosing mating surfaces.





    Fig. 11: Exploded view of the thermostat assembly components
    1996-98 diesel engines
    91023g02.gif

    To install:

  6. Place the thermostat into position in the housing, then install the gasket.
  7. Install the thermostat housing, the bolt and the stud. Tighten the bolt and
    stud to 31 ft. lbs. (42 Nm).
  8. Attach the upper radiator (inlet) hose to the thermostat outlet.
  9. Fill the cooling system.
  10. Start the engine with the radiator cap still removed, until the upper
    radiator hose is hot (this means the thermostat is open).
  11. With the engine idling, add coolant until the coolant level reaches the
    bottom of the filler neck.
  12. Instal the radiator cap making sure the arrows line up with the overflow
    tube and check for coolant leaks.


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Oct 07, 2010 | Chevrolet 1500 Cars & Trucks

2 Answers

Need help on changing thermostat on 2001 kia optima


AutoZone.com lists the following procedure for several engines. If your engine is different, try going back to autozone.com with exact engine spec.


Removal & Installation

1.5L, 1.6L, 1.8L & 2.0L Engines
  1. Drain the coolant to a level below the thermostat.
  2. Remove the water inlet fitting, gasket and thermostat.
  3. Clean the gasket mating surfaces.

    0996b43f802066a5.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Exploded view of the thermostat-1.5L engine shown, 1.8L similar


    0996b43f802066a4.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Exploded view of the thermostat-1.6L engine


    0996b43f8020669f.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Water inlet fitting (A) and thermostat-2.0L engine

To install:
  1. Place the thermostat in the housing with the jiggle valve facing upward. Install a new thermostat gasket.

    0996b43f802066a0.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Use a new gasket (A) when installing the thermostat (B)-2.0L engine shown
  2. Install the water inlet fitting and tighten to 14-19 ft. lbs. (19-26 Nm) for 1.5L, 1.6L and 1.8L engines, or to 11-15 ft. lbs. (15-20 Nm) for 2.0L engines.
  3. Fill the engine with coolant, then start the engine and check for leaks.

2.4L & 2.7L Engines
  1. Drain the coolant to a level below the thermostat.
  2. Remove the engine coolant outlet fitting and gasket.
  3. Remove the thermostat.
  4. Clean the gasket mating surfaces.

    0996b43f802066a3.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Thermostat mounting-2.4L engine

To install:
  1. Install the thermostat. Make sure that the flange of the thermostat is correctly seated in the socket of the thermostat housing. If the thermostat is installed in the wrong direction, the bottom of the thermostat will touch the rib inside the intake manifold, making it impossible to seat flange in position
  2. Install a new gasket and the engine coolant outlet fitting. Tighten the fitting bolt to 7-11 ft. lbs. (10-15 Nm) for 2.4L engines or to 12-14 ft. lbs. (17-20 Nm) for 2.7L engines.
  3. Fill the engine with coolant, then start the engine and check for leaks.

Aug 25, 2010 | Kia Optima Cars & Trucks

1 Answer

Where is the thermostat


Please choose the correct steps for the size of engine that you have:

4.5L & 4.9L Engines
  1. Drain the coolant to a level below the thermostat housing.
  2. It may be necessary to remove the upper air filter assembly on some models.
  3. Remove the 2 bolts securing the upper thermostat housing to the lower housing.
  4. Remove the upper thermostat housing.
  5. Remove the thermostat and O-ring from the lower housing.

280c20b.gif
Thermostat installation—4.5L and 4.9L engines

To install:
  1. Install the thermostat and a new O-ring to the lower housing.
  2. Install the upper thermostat housing to the lower housing. Tighten the thermostat housing bolts to 20 ft. lbs. (27 Nm).
  3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
  4. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.

4.6L Engines
  1. Drain the coolant to a level below the thermostat housing.
  2. On some vehicles, access is easier if the front-end beauty panel and the air cleaner are removed.
  3. Remove the 2 bolts securing the thermostat housing to the intake manifold.
  4. Remove the thermostat housing.
  5. Remove the thermostat and O-ring from the housing.

57a3857.gif
Thermostat installation—4.6L Engine


3b692a6.gif
Loosen the upper radiator hose clamp at the thermostat housing


d0a7ab0.gif
Remove the upper radiator hose clamp from the thermostat housing


d22f120.gif
Remove the thermostat housing retaining bolts and . . .





d497806.gif
. . . remove the thermostat housing from the engine


c2d4b5e.gif
Separate the thermostat from the housing

To install:
  1. Install the thermostat and new O-ring to the housing.
  2. Install the thermostat housing to the intake manifold. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
  3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
  4. Install the air cleaner and beauty panel, if removed.
  5. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.

May 23, 2010 | 1996 Cadillac DeVille

1 Answer

Replace thermastat where is it and i need a easy fix solution


2.0L & 2.4L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
    CAUTION This operation must only be performed on a cold engine.
  3. Drain cooling system to the thermostat level or below.
  4. Remove or disconnect the following:
    Coolant recovery system hose Thermostat/engine outlet connector bolts Inlet hose and coolant elbow from thermostat housing
  5. Remove thermostat assembly and clean sealing surfaces.

    240b2a6.jpg
    Fig. Thermostat and housing-2.0L and 2.4L engines

To install:
  1. Place the new thermostat assembly into the engine outlet connector. Align air bleed with notch on the cylinder head.
  2. Install engine outlet connector onto cylinder head and tighten bolts to 110 inch lbs. (12.5 Nm)
  3. Connect the coolant recovery system hose.
  4. Fill cooling system.

  1. Drain cooling system to the thermostat level or below.
  2. Remove the Coolant Recovery System (CRS) hose and thermostat/engine outlet connector bolts.
  3. Remove the thermostat assembly, and clean sealing surfaces.

    969cc63.jpg
    Fig. Thermostat assembly-2.0L engine


    f7f1b3d.jpg
    Fig. Thermostat assembly-2.4L engine

To install:
  1. Place the new thermostat assembly into the engine outlet connector.
    1. Align air vent upward with notch on the cylinder head (2.0L engine).
    2. Make sure spring side of thermostat faces cylinder head.

  2. Install the engine outlet connector onto cylinder head and tighten bolts to 110 inch lbs. (12.5 Nm)
  3. Connect the Coolant Recovery System (CRS) hose.
  4. Fill cooling system.

2.4L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system to the thermostat level or below.
  3. Remove the Coolant Recovery System (CRS) hose and thermostat/engine outlet connector bolts.
  4. Remove the thermostat assembly, and clean sealing surfaces.

    a1e1b65.jpg
    Fig. Thermostat assembly-2.4L engine

To install:
  1. Place the new thermostat assembly into the engine outlet connector.
  2. Make sure the spring side of the thermostat faces the cylinder head.
  3. Install the engine outlet connector onto cylinder head and tighten bolts to 110 inch lbs. (12.5 Nm)
  4. Connect the CRS hose.
  5. Fill the cooling system to the proper level.

Hope help with this (remember rated this post).

Apr 15, 2010 | 2002 Chrysler Sebring

1 Answer

Want to know how to change a thermostat on my 2004


It Depends on which engine you have, this is how it goes for both. I use a little RTV with a new ring as well.

THERMOSTAT REPLACEMENT (4.2L ENGINE)
Removal Procedure
1. Remove the necessary coolant from the radiator.
2. Remove the generator.
3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
4. Remove the thermostat housing bolts.
5. Remove the thermostat housing from the engine block.
6. Clean all of the surfaces of the thermostat housing.
7. Clean the sealing surface of the engine block.
Installation Procedure
1. Install the thermostat housing to the engine block.
2. Install the thermostat housing bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
3. Lubricate the inner diameter of the radiator hose with engine coolant.
4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
5. Install the generator.
6. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
7. Inspect all sealing surfaces for leaks after starting the engine.
THERMOSTAT REPLACEMENT (5.3L ENGINE)
1. Drain Radiator and remove the radiator outlet hose.
2. Remove the water pump inlet bolts.
3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure
IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Install the thermostat and thermostat housing to the water pump.
2. Install the thermostat housing bolts.15 N.m
3. Install the radiator outlet hose.
4. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine.
5. Inspect all sealing surfaces for leaks after starting the engine.

Mar 17, 2010 | 2004 GMC Envoy

1 Answer

Thermostat housing replacement


These are the steps to replace the thermostat but are applicable to remove and replace the housing also. 2.0L DOHC Zetec Engine WARNING Do not mix Standard (green) Coolant with Extended Life Coolant (orange). If mixing occurs, drain engine cooling system and refill with originally equipped coolant type. If this contamination occurs the service change interval on Extended Life Coolant will be reduced from 6 years/150,000 miles to 3 years/30,000 miles.

  1. Disconnect the battery ground cable.
  2. Drain the engine coolant to a point below the water thermostat.
  3. Disconnect the connector from the camshaft position sensor.
  4. Remove the bolts and move to one side the water hose connection.
  • Remove the water thermostat and seal from the water thermostat housing.
  • Inspect the seal and the water thermostat.
  • To install:
    1. Replace the thermostat and seal into the housing.
    2. Connect the connector to the camshaft position sensor.
    3. Fill the cooling system.
    4. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
    5. Stop the engine. Top off the coolant recovery reservoir as necessary to maintain minimum cold fill level.
    e990057.gif

    2.0L SOHC Spi Engine
    1. Disconnect the battery ground cable.
    2. Remove the air cleaner outlet tube.
    3. Drain the engine coolant to a point below the water thermostat.
    4. Disconnect the water temperature indicator sender unit and the engine coolant temperature sensor electrical connectors.
    5. Disconnect the upper radiator hose and the heater coolant hose from the water thermostat housing.
    6. Remove the water thermostat housing bolts, the water thermostat housing, and the water thermostat.
    To install:
    NOTE Make sure all of the gasket surfaces are free of all gasket material. Make sure the tabs on the engage properly into slots in thermostat housing.

    1. Install the thermostat housing bolts, thermostat housing and the thermostat.
    2. Connect the upper radiator hose and the heater coolant hose to the thermostat housing.
    3. Connect the water temperature indicator sender unit and the engine coolant temperature sensor electrical connectors.
    4. Fill the cooling system with only Ford Premium Engine Coolant E2FZ-19549-AA (in Oregon F5FZ-19549-CC, in Canada, Motorcraft CXC-8-B) or equivalent meeting Ford specification in a 50/50 mixture with water.
    5. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
    6. Stop the engine. Top off coolant recovery reservoir as required to maintain minimum cold fill level.

    Dec 07, 2009 | 2000 Ford Escort

    1 Answer

    How to replace the thermostat


    1. Remove the necessary coolant from the radiator.
    2. Remove the alternator, as outlined in the Engine Electrical Section.
    3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
    4. Remove the thermostat housing bolts.
    5. Remove the thermostat housing from the engine block.
    6. Clean all of the surfaces of the thermostat housing.
    7. Clean the sealing surface of the engine block.
    To install:

    6d319e8.gif
    Thermostat mounting—4.2L engine

    1. Install the thermostat housing to the engine block.
    2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
    3. Lubricate the inner diameter of the radiator hose with engine coolant.
    4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
    5. Install the alternator.
    6. Fill the cooling system with specified coolant and concentration.
    7. Inspect all sealing surfaces for leaks after starting the engine.

    Oct 11, 2009 | 2003 GMC Envoy

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