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Water leak thermostats housing where water line with. Flange attaches

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Posted on Jan 02, 2017

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SOURCE: leaking water from under thermostat housing 94 toyota truck

The thermostat housing gasket may have failed or the cap screws may have loosened, allowing the leak. Be careful to avoid overtightening the cap screws, causing the housing to break

Posted on Mar 17, 2013

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Leaking water from under thermostat housing 94 toyota truck


The thermostat housing gasket may have failed or the cap screws may have loosened, allowing the leak. Be careful to avoid overtightening the cap screws, causing the housing to break

Mar 17, 2013 | 1994 Toyota Pickup

1 Answer

Where do you find and change a thermostat on a 1988 F250 7.3 diesel?


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Section 03-01D: Diesel Engine, 7.3L V-8 1992 Bronco/Econoline/F-Series Workshop Manual
REMOVAL AND INSTALLATION Please rate highly if this helps. this is 1992, only thing I have, should be the same. Thermostat A poppet-type thermostat is used with the engine. When the thermostat is closed, coolant flows to the water pump through a bypass passage at the front of the engine. When the thermostat is open, coolant flows through the coolant outlet elbow (thermostat housing) to the radiator. ani_caut.gif CAUTION: Replacement thermostats other than the specified Motorcraft or Navistar thermostats may result in engine overheat damage. The specified thermostat does not contain an internal bypass, since the by-pass is located in the cylinder block. Therefore, whenever the thermostat is replaced, it is mandatory that only Motorcraft E5TZ-8575-C or Navistar 1807945-C1 thermostat be installed.
The thermostat is a high temperature thermostat for use with a mixture of water and permanent-type antifreeze. ani_caut.gif CAUTION: Do not attempt to repair the thermostat. It should be replaced if it is not operating properly.
Check the thermostat before installing it, following the procedure described in this section.

Thermostat Design (Acceptable vs. Unacceptable)


a119101a.gif

Removal
  1. Disconnect ground cables from both batteries. NOTE: On vehicles equipped with EEC, when the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the EEC processor relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.
  1. Drain coolant from radiator until coolant level is below thermostat. Refer to Section 03-03, Engine Cooling.
  1. Loosen and remove alternator and vacuum pump drive belts.
  1. Remove alternator. Position alternator out of the way.
  1. Remove vacuum pump and bracket. Position pump out of the way.
  1. Remove all but the lowest alternator/vacuum pump mounting casting bolt. Loosen the lowest bolt and pivot the alternator/vacuum pump casting outboard.
  1. Remove the water outlet housing attaching bolts. Bend the radiator upper hose upward and remove the thermostat and gasket.
  1. Inspect thermostat as outlined in this section.
Installation
  1. Clean the water outlet housing gasket surfaces. Coat a new outlet housing gasket with Perfect Seal Sealing Compound B5A-19554-A (ESR-M18P2-A) or equivalent. Position the water outlet housing gasket on intake manifold opening.
  1. Install thermostat in crankcase opening with the copper pellet or element toward engine and the thermostat flange positioned in the recess. If thermostat is improperly installed, it will cause a restricted flow of coolant.
  1. Position the water outlet housing against the crankcase. Install and tighten the attaching bolts to specification listed at the end of this section.
  1. Reposition the alternator/vacuum pump casting. Install attaching bolts.
  1. Install vacuum pump with bracket and tighten to specification. Refer to Section 03-05, Accessory Drive.
  1. Install alternator and drive belt.
  1. Install vacuum pump drive belt.
  1. Adjust alternator and vacuum pump drive belts to specification. Refer to Section 03-05, Accessory Drive.
  1. Fill and bleed the cooling system. Refer to Section 03-03, Engine Cooling.
  1. Connect ground cables to both batteries.
  1. Operate the engine until normal operating temperature is reached, then check the coolant level. Inspect cooling system for leaks. ani_caut.gif WARNING: DO NOT STAND IN LINE WITH OR NEAR RADIATOR FAN WHEN REVVING ENGINE.

Feb 01, 2011 | Ford F-250 Cars & Trucks

1 Answer

: where is the thermostat located on a 2002 buick century custom


For 2002 Buick Century 3.1L SFI OHV 6cyl

zjlimited_444.jpg

Fig. The thermostat on this 3.1L is mounted horizontally and uses an offset housing/water outlet

  1. Disconnect the negative battery cable.
  2. Partially drain the cooling system into a suitable container, to a level below the thermostat.
  3. It is usually possible to leave the radiator hose attached and simply remove the thermostat housing (also called a water outlet) and flex the radiator hose enough to service the thermostat. It is good practice, however, to remove the radiator hose so the thermostat housing can be given a thorough cleaning. Debris on the thermostat housing sealing surface can cause leaks.
  4. Some applications may have electrical connections to sensors which mount in the thermostat housing. Use care when detaching these connectors.
  5. Unfasten the thermostat housing bolts and remove the housing.
  6. Remove the thermostat by simply pulling out. Discard the gasket.
To install:
  1. Clean all parts well. Make sure the sealing surfaces on both the thermostat housing gasket flange and the intake manifold are clean and free of corrosion damage. It is good practice to run a thread cutting tap or a clean bolt into the threaded holes in the manifold to clean out old sealer and dirt. The threads should be clean so the thermostat cover clamps the gasket evenly at assembly.
  2. Position the thermostat in the intake manifold. Make sure it is seated.
  3. Position a new gasket over the thermostat. If no gasket is used, apply a 0.125 in. (3mm) bead of RTV sealer to the thermostat housing and install the housing. Lightly lubricate the bolts with clean engine oil. Torque to 18-20 ft. lbs. (23-27 Nm).
  4. If removed, attach the radiator hose to the thermostat housing.
  5. Refill the engine with the proper mix of DEX-COOL®and water. Connect the negative battery cable, start the engine and check for leaks.

Good luck (remember to rate this answer).

Jan 11, 2011 | 2002 Buick Century

2 Answers

I need to replace the thermostat it is sticking


DRAIN COOLANT LEVEL DOWN BELOW THERMOSTAT.PLACE DRAIN PAN UNDER VECHICLE TO CATCH ANTIFREEZE.WHEN DONE PUT ANTIFREEZE SAFE PLACE FROM KIDS AND ANIMALS.WHEN DONE DRAINING SOME ANTIFREEZE.FOLLOW RADIATOR HOSE TO TOP OF INTAKE TO THERMOSTAT HOUSING. LOOSEN HOSE CLAMP REMOVE RADIATOR HOSE FROM THERMOSTAT HOUSING.THEN LOOSEN HOUSING BOLTS.REMOVE THERMOSTAT HOUSING AND THERMOSTAT.CLEAN BOTH THE THERMOSTAT HOUSING SURFACE AND INTAKE SURFACE YOU CAN USE ACETATE OR BRAKE CLEANER AND SCOTCH BRITES ROLL OF CLEAN PAPER TOWEL. AFTER CLEANING HOUSING AND INTAKE SURFACE MAKE SURFACE CLEAN SMOOTH FROM THE DEBRIS WHEN DONE. TAKE THERMOSTAT PUT GASKET SEALER ON BOTH SIDES OF GASKET PUT GASKET TO THERMOSTAT HOUSING MAKE SURE GASKET AND THERMOSTAT HOUSING HOLES ALIGN CORRECTLY.NOW PLACE NEW THERMOSTAT IN PLACE IN THE INTAKE.MAKE SURE THERMOSTAT SPRING END GOES TOWARD ENGINE FACING DOWN.THEN INSTALL THERMOSTAT HOUSING WITH GASKET TO THE INTAKE.TORQUE THERMOSTAT HOUSING BOLTS TO 20 FT LBS.WAIT 1 HOUR BEFORE POURING ANTIFREEZE BACK IN THE COOLANT SYSTEM GIVE THERMOSTAT GASKET SEALER LITTLE TIME TO CURE.SO YOU WONT HAVE COOLANT LEAKS.NOW IF THERMOSTAT HAS THE LARGE O- RING ON IT YOU DONT HAVE A THERMOSTAT HOUSING GASKET THE THERMOSTAT O- RING IS THE SEAL THAT HOLDS COOLANT INSTEAD OF GASKET.WHEN THERMOSTAT AND HOUSING IN PLACE.INSTALL RADIATOR HOSE TO THERMOSTAT HOUSING TIGHTEN HOSE CLAMP.THEN FILL RADIATOR BACK UP WITH THE COOLANT YOU DRAIN OUT.START VECHICLE UP. THEN CHECK FOR LEAKS.

Nov 03, 2010 | 1992 Buick LeSabre

1 Answer

How do I change the thermostat on a 1999 dodge intrepid 2.7L


The thermostat on the 2.7L and 3.5L engines are located on the lower left side of engine, near the front. The thermostat on both engines are on the inlet side of the water pump.

2.7L Engine
  1. Disconnect negative cable.
    CAUTION Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
  2. Drain cooling system.
  3. Remove radiator lower hose from thermostat housing.
  4. Remove nuts from heater tube flange studs.
  5. Loosen starter bolt at heater tube bracket.
  6. Pull heater tube out of thermostat housing and position out of the way.
  7. Remove bolt and two studs.
  8. Remove thermostat housing, O-ring and thermostat.
  9. Remove thermostat housing bolts.
To install:
  1. Clean gasket sealing surfaces.
    NOTE Install thermostat with the bleed valve located at the 12 o'clock position, between tabs on seal.
  2. Install thermostat and seal into thermostat housing .
  3. If removed, install two studs.
  4. Install thermostat, thermostat housing and O-ring and bolt. Tighten attaching bolts to 105 inch lbs.(12 Nm).
  5. Lubricate new heater return tube O-ring with coolant.
  6. Position heater return tube flange over two studs. Install nuts.
  7. Tighten retaining nuts to 53 inch lbs.(6 Nm).
  8. Tighten starter bolt to 40 ft. lbs. (54.3 Nm).
  9. Connect the lower radiator hose to the thermostat housing. Install hose clamps.
  10. Refill cooling system.
  11. Inspect for leaks.
  12. Connect negative cable.

Hope helps (remember to rate and comment this).

Sep 29, 2010 | 1999 Dodge Intrepid

1 Answer

How to install thermostat


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.

6d5c45d.gif
  1. Fig. Thermostat mounting-2.2L engine
  2. 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.

Sep 25, 2010 | 2003 Pontiac Grand Am

1 Answer

How do you change the thermostat and the radiator hose on a 1999 pontiac grand prix


Thermostat - REMOVAL & INSTALLATIONCAUTION Never open the radiator cap or the cooling system when the engine is hot. The system is under pressure and will release scalding hot coolant and steam which can cause severe burns and other bodily harm. After the engine has cooled, drain the coolant into a suitable container. Coolant should be reused unless it is contaminated or several years old.
3.1L, 3.4L (VIN X) and 3.8L Engines
  1. Disconnect the negative battery cable.
  2. Partially drain the cooling system into a suitable container, to a level below the thermostat.
  3. It is usually possible to leave the radiator hose attached and simply remove the thermostat housing (also called a water outlet) and flex the radiator hose enough to service the thermostat. It is good practice, however, to remove the radiator hose so the thermostat housing can be given a thorough cleaning. Debris on the thermostat housing sealing surface can cause leaks.
  4. Some applications may have electrical connections to sensors which mount in the thermostat housing. Use care when detaching these connectors.
  5. Unfasten the thermostat housing bolts and remove the housing.
  6. Remove the thermostat by simply pulling out. Discard the gasket.
To install:
  1. Clean all parts well. Make sure the sealing surfaces on both the thermostat housing gasket flange and the intake manifold are clean and free of corrosion damage. It is good practice to run a thread cutting tap or a clean bolt into the threaded holes in the manifold to clean out old sealer and dirt. The threads should be clean so the thermostat cover clamps the gasket evenly at assembly.
  2. Position the thermostat in the intake manifold. Make sure it is seated.
  3. Position a new gasket over the thermostat. If no gasket is used, apply a 0.125 in. (3mm) bead of RTV sealer to the thermostat housing and install the housing. Lightly lubricate the bolts with clean engine oil. Torque to 18-20 ft. lbs. (23-27 Nm).
  4. If removed, attach the radiator hose to the thermostat housing.
  5. Refill the engine with the proper mix of DEX-COOL® and water. Connect the negative battery cable, start the engine and check for leaks.

Hope helps (remember rated and comment this). Good luck.

May 27, 2010 | 1999 Pontiac Grand Prix

1 Answer

How to change the thermostat


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.

    d1db35e.jpg
    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).

Apr 04, 2010 | 1999 Oldsmobile Alero

2 Answers

Need to know where the thermostat is on my 99 deville


Hi,
The thermostat is located in a housing attached to your engine, where the top radiator hose is connected to that housing.
I hope this helps...

Oct 16, 2009 | 1999 Cadillac DeVille

1 Answer

How do you replace a thermostat on a 2002 toyota celica


Toyota Celica, Corolla, ECHO & MR2 1999-05Toyota Celica, Corolla, ECHO & MR2 1999-05

2002 Toyota Celica 1.8L MFI DOHC 4cyl


The thermostat is located in the water inlet housing that is connected to the lower radiator hose.
The thermostat is equipped with a by-pass valve. If the engine tends to overheat, removal of the thermostat would cause a decrease in cooling system efficiency.

CAUTION NEVER drain coolant directly onto the ground! 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.
d4c6b82.jpg

Fig. The oil filter must be removed to access the thermostat on the 5S-FE engine
  1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.
  2. On the 7A-FE engine disconnect the engine coolant temperature switch harness from the water inlet housing.
de1afd5.jpg

Fig. Disconnect the engine coolant temperature switch wiring located on the side of the thermostat housing
  1. Remove the oil filter on 5S-FE engines.
  2. Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
d253a81.jpg

Fig. Loosen the radiator hose clamp ...

5746ade.jpg

Fig. ... then slide the hose off the thermostat housing
  1. Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
f78b0a7.jpg

Fig. Only two nuts hold the housing to the cylinder head

de736db.jpg

Fig. Pull the housing straight out to remove
  1. Remove the thermostat and rubber O-ring gasket from the water inlet housing.
f722bd2.jpg

Fig. Then pull the thermostat and gasket out

bd62248.jpg

Fig. Sometimes the gasket is stuck and has to be pried out of the head
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 5S-FE engines, align the jiggle valve with the upper side of the stud bolt. Insert the thermostat into the housing.
abce49b.jpg

Fig. Only use the correct temperature range thermostat when for replacement

edd75f2.jpg

Fig. Align the jiggle valve within a 10°gap of the stud bolt-7A-FE engine

d56a45f.jpg

Fig. Align the jiggle valve within a 5°gap of the stud bolt-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 78-82 inch lbs. (9-10 Nm).
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.
  2. Attach the water temperature switch connector.
  3. Install the oil filter and check the oil level if removed.
  4. Fill the cooling system with a good brand of ethylene glycol based coolant.
  5. Start the engine and inspect for leaks.
  1. Remove the right hand cover under the engine.
  2. Drain the engine coolant.
  3. Remove the fan and generator V belt.
  4. Remove the generator assembly
  5. Remove the water inlet via the two nuts.
  6. Remove the thermostat.
To install:
  1. Install a new gasket onto the thermostat.
  2. Install the thermostat with the jiggle valve upward. It can be set within 10 degrees on either side of the prescribed position.
  3. Install the water inlet via the two nuts. Torque to 8 ft. lbs. (11 Nm).
  4. Install the generator assembly.
  5. Add engine coolant.
  6. Inspect for leaks.
  7. Replace the cover under the engine.
I hope help you with this (remember rated this help) Good luck.

Sep 29, 2009 | Toyota Celica Cars & Trucks

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