Question about 1994 Toyota Camry

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How to replace thermostat - 1994 Toyota Camry

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  • Toyota Master
  • 17,970 Answers

1994 Toyota Camry 2.2L EFI DOHC 4cyl
On both diesel and gasoline engines, the thermostat is located in the water inlet housing connected to the lower radiator hose.

R
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.
Gasoline Engines
(see Figures 1, 2, 3, 4, 5, 6 and 7)

  1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.
  2. On the 1MZ-FE engine, remove the air cleaner cap assembly. Be sure to label all wiring disconnected.
  3. Disconnect the water temperature switch harness from the water inlet housing (except 5S-FE engines).
  4. Remove the oil filter on 5S-FE engines. On the 1MZ-FE engines, remove the heater hose covering the housing.
  5. Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
  6. Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
  7. Remove the thermostat and rubber O-ring gasket from the water inlet housing.
To install:
  1. Make sure all the gasket surfaces are clean. Clean the inside of the inlet housing and the radiator hose connection with a rag.
  2. Install the new rubber O-ring gasket onto the thermostat. On 2SE and 3S-FE engines, align the jiggle valve of the thermostat with the protrusion on the water inlet housing. On 5S-FE engines, align the jiggle valve with the upper side of the stud bolt. On 2VZ-FE and 3VZ-FE engines, align the jiggle valve with the stud bolt. Insert the thermostat into the housing.
how to replace thermostat - 762d5d3.jpg

Fig. Fig. 1: Remove the thermostat housing from the engine with the coolant temperature sensor-1MZ-FE engine

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Fig. Fig. 2: Removing the thermostat from the engine-1MZ-FE engine

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Fig. Fig. 3: Always discard the old O-ring from the thermostat, if reusing the old component how to replace thermostat - 2ff0a56.jpg
2ff0a56.jpg

Fig. Fig. 4: Always replace the thermostat with the correcthow to replace thermostat - e50fd7b.jpge specifications

e50fd7b.jpg

Fig. Fig. 5: The thermostat is placed in between the housing and thow to replace thermostat - f5e46a6.jpg head as shown here-2S-ELC and 3S-FE engines

f5e46a6.jpg

Fig. Fig. 6: Line-up the jiggle valve with the protrusion on the housing-5S-FE engine
  1. Position the water inlet housing with the thermostat over the studs on the water pump and install the two nuts. Tighten the two nuts to 78 inch lbs. (9 Nm) on 4 cyl. enginehow to replace thermostat - 62e4095.jpgnd 3VZ-FE; 14 ft. lbs. (20 Nm) and 69 inch lbs. (8 Nm) on 1MZ-FE engines.
62e4095.jpg

Fig. Fig. 7: Thermostat installation-2VZ-FE and 3VZ-FE engines
Don't forget to install a new O-ring onto the water inlet pipe. Apply soapy water to the O-ring prior to installation.
  1. Connect the lower radiator hose to the inlet housing and install the hose clamp. On the 3VZ-FE, tighten the bolt holding the water inlet hose to the alternator belt adjusting bar to 14 ft. lbs. (20 Nm). On the 1MZ-FE engine, tighten the bolt retaining the water inlet pipe to the cylinder head to 14 ft. lbs. (20 Nm).
  2. Attach the water temperature switch connector.
  3. On the 1MZ-FE engines, install the heater hose removed.
  4. Install the oil filter and check the oil level if removed. Install the air cleaner cap assembly on the 1MZ-FE engines.
  5. Fill the cooling system with a good brand of ethylene glycol based coolant.
  6. Start the engine and inspect for leaks.

continue...

Posted on Sep 29, 2009

  • ZJ Limited
    ZJ Limited Sep 29, 2009





    Diesel Engines




    1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.


    2. Disconnect the radiator cooling fan wiring.


    3. Remove the right engine under cover. Unbolt and remove the radiator cooling fan shroud fan with motor.


    4. Loosen the lower radiator hose from the water inlet housing.


    5. Loosen the air conditioning compressor pulley lockbolt and drive
      belt adjusting bolt. Remove the drive belt from the pulley. Remove the
      three compressor mounting bolts and position the air conditioning
      compressor off to the side.




    CAUTION

    DO NOT disconnect the refrigeration lines from the compressor.




    1. Remove the two bolts from the water inlet housing and remove the
      housing, rubber O-ring gasket and thermostat from the cylinder block.



    To install:




    1. Make sure all the inlet and cylinder block gasket surfaces are
      clean. Clean the inside of the inlet housing and the radiator hose
      connection with a rag.



    2. Install the new rubber O-ring gasket onto the thermostat and
      place the thermostat into the cylinder block with the jiggle valve
      facing outward.



    3. Place the water inlet with the thermostat and gasket onto the
      cylinder block and install the two bolts. Tighten the bolts to 65 inch
      lbs. (7 Nm).



    4. Place the air conditioning compressor back into position and
      install the three mounting bolts. Install the drive belt onto the
      compressor pulley and adjust the drive belt tension.



    5. Connect the lower radiator hose to the water inlet and install the hose clamp.


    6. Install the radiator cooling fan shroud/fan/motor assembly. Install the right engine under cover.


    7. Connect the radiator cooling fan motor harness.


    8. Fill the cooling system with a good brand of ethylene glycol based coolant to the proper level.


    9. Start the engine and inspect for leaks. Recheck the air conditioning compressor drive belt tension.


    I really hope help you with this (remember rated this help) Good luck.


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  • Master
  • 496 Answers

Hi,
The thermostat is located in a housing mounted on the engine at the end of your upper radiator hose.
Drain some of the coolant from the radiator to a level lower than the thermostat housing.
Undo the radiator hose from the housing and lift the end upward to drain the coolant in the hose back into the radiator... hey if it spills it's ok.
Loosen and gently remove the thermostat housing. It has a gasket so it might be stubborn but please be careful not to get too aggressive, it could break.
Note the position of the thermostat. POut your new one in correctly... not backwards.
Scrape the old gasket from the housing and apply the new one that should come with your new thermostat.
Reassemble the housing (don't over tighten and break it).
Reconnect the radiator hose.
Refill the coolant.
Crank her up and let her warm up... check for leaks.
You're good to go.
It's a relatively easy project... Hope this helps.
Good luck!

Posted on Sep 29, 2009

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  2. 790876.gif
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  3. Complete the following in order to remove the thermostat from the thermostat housing:
  4. 2.1. Depress the ears on both sides of the thermostat. 2.2. Rotate the thermostat until it clears the retaining feature of the housing. 2.3. Release the pressure from the thermostat. 2.4. Pull the thermostat from the thermostat housing.
Installation Procedure

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  1. Complete the following in order to Install the thermostat into the thermostat housing:
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The removal of the thermostat from its housing on the 4.0L engine

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