Question about 1993 Buick Century

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Wanting to change thermostat, not sure if I can get the housing off, I don't want to break the seal until I know for sure I can get it off. exhaust manifold runs around it with close to 1/2" clearance between it and the thermostat housing on a 93 buick century 3.1L. stuck.

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  • chuckevergre Feb 07, 2010

    I can't believe that a mechanic would take the exhaust loose to change a thermostat, but I am not a mechanic. It has a long housing on this one, I am still unsure about it.
    Chuck

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  • Master
  • 396 Answers

Only 2 bolts holding it on. Not exactly a fun thing to do. Just take your time and remove anything thats in your way.. Try not to take the exhaust off however. If you break bolts on the exhaust, you have a whole new can of worms. 1 more thing,,,, try to tighten the bolt first before loosening

Posted on Feb 06, 2010

  • henryj1953 Feb 07, 2010

    Take the hose off 1st. You may need a wobble type extension to reach the bolts. You can do it. just a thermstat with the rubber seal. Luckily you don't have a paper gasket to fool with

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1 Answer

Changing thermostat v6


drain coolant until its below the thermostat.then remove two thermostat housing bolts.remove thermostat housing and thermostat.make note position of thermostat before removing it.then carefully clean all old gasket material from thermostat housing and cylinder block you can buy can gasket remover at any auto parts stores.buy new thermostat gasket.if you have the paper type you need to buy RTV SILICONE to help seal gasket if you have rubber type gasket you dont need RTV SILICONE.make sure both surfaces are clean.then install new thermostat and new gasket.if you have paper type gasket apply thin 1/16 coat RTV SILICONE both sides thermostat gasket.then install gasket to thermostat housing then install housing to cylinder block first make sure new thermostat in place before installing thermostat housing. let RTV silicone sit up about hour before adding coolant.IF THERMOSTAT HAS THE O RING SEAL DONT NEED RTV SILICONE AND THE PAPER GASKET.

Jul 01, 2013 | Mercury Sable Cars & Trucks

1 Answer

What to disassemble to change thermostat


You will need to remove your air cleaner and duct assembly. You will then see the thermostat housing sandwiched between the back of the intake manifold and the exhaust crossover pipe. The service manual says to remove the exhaust crossover pipe, but trust me, you do not want to attempt this unless you have access to a torch to heat the nuts that hold the thing to the exhaust manifolds. If you break a stud, then you are going to be removing an exhaust manifold for broken stud removal. If you take the 8mm screws out of the heat shield on the exhaust crossover pipe, you can wiggle the heat shield out. This will provide enough room to get the lower thermostat housing bolt out. It is a pain to do it this way, but it works and will prevent broken exhaust pipe studs. Sometimes the little 8mm bolts will also break, but since they only hold the heat shield, it is of no great consequence.

Then all you have to do is remove the two bolts that hold the thermostat housing to the manifold. The thermostat is directly under it.
Then the only other real "trick" is getting the thermostat and O-ring to stay in the correct position while you put the thermostat bolts back in. A trick that I use is a small wooden wedge. I put the thermostat housing into place over the thermostat and O-ring, then place mt wedge between the thermostat housing and the crossover pipe to hold the thermostat housing in place while I start the bolts. Otherwise, the thermostat tends to slide out the bottom while you are trying to get the bolts started.

Let me know how it goes...

Jun 16, 2012 | 2002 Buick Rendezvous

3 Answers

Where is the thermostat located on a 98 olds achieva 3.1?


Follow the upper rad hose to where it meets the engine.The hose is attached to the thermostat housing,just tucked under the exhaust crossover pipe.

Sep 06, 2011 | 1998 Oldsmobile Achieva

2 Answers

I have a 1995 jeep cherokee straight six or 4.0 liter where is the radiator thermosta soo i can replace it


Hi, It is actually called an engine thermostat, as it regulates coolant flow through the engine. If you follow the top large hose coming off the radiator to where it connects onto the engine, you will find a housing there connected to the engine with 2 bolts. There may be another hose connected to this housing also. You will lose a bit of coolant when doing this, so use a bunch of rags under the work area and a catch pan beneath the vehicle.
Parts needed: Thermostat, gasket, tube of black RTV sealant, new clamps for hoses if they look rusty or do not have good resistance on removal. (for factory spring type clamps)

Procedure:
Remove hoses from housing and bend back and tape back out of the way (use some cable ties if you wish) to keep coolant from running everywhere and so they are out of your work area. Remove 2 bolts holding the thermostat housing to engine. Gently tap housing with rubber hammer to break the gasket seal on housing. Once housing is off, you will find the thermostat underneath. Remove thermostat from engine. Clean the housing and engine mating sufaces of all traces of gasket material. Surfaces must be clean and dry before re-assembly. Use a rag to soak some coolant out of engine side hole to facilitate cleanup. Scrape off gasket material and use brake cleaner to wipe off residue and dry with clean shop rag. There are 2 types of thermostats for the jeeps, one has a rubber seal around the thermostat, and requires no other gasket, the other has no seal and requires a separate paper type gasket to be sealed to the mating surfaces. I believe the straight 6 has the paper type. Install thermostat with spring end into engine cavity. Put a thin even coating of black RTV sealant on the engine mating surface. Place gasket on RTV coated surface, aligning the bolts holes to holes in gasket. Apply thin even coat of black RTV sealant to thermostat housing mating surface. Put a small amount of RTV sealant on threads of bolts (clean them first) coating the entire thread. Put housing onto engine and install bolts finger tight - firmly seated. Allow RTV to cure for 5 minutes. Some RTV will squish out, thats OK, but use the RTV as a THIN EVEN coat, as you dont want a bunch of excess sealant in the thermostat cavity. Torque bolts to 16-20 ft. lbs. or a good wrist tightening. DO NOT overtorque, as you will either crack the housing, or cause warpage making your gasket leak. Re-install hoses and tighten clamps. If spring type clamps were on the hoses, replace the small clamp with a band type clamp. If large clamp installs tightly, it can be reused. If it was rusty and goes on rather easily/weakly - replace with a band type clamp. Refill - check coolant level, add as needed. Start engine, allow to reach operating temperature and check for leaks. Done!
Please rate this answer! Thanks, Mike

Jun 20, 2011 | 1995 Jeep Grand Cherokee

1 Answer

Need to change engine thermostat on 2002 saturn vue. would like diagrams on how to and what to look for.


2.2L Engine To Remove:
  1. Drain the cooling system.
  2. Remove the exhaust manifold heat shield.
  3. Remove or disconnect the following:
  4. Thermostat housing to water pump feed pipe chevy_cav_02-04_tstat.gif
  5. Remove the thermostat cover bolts from the thermostat housing.
  6. Remove and discard the thermostat housing O-ring.
  7. Thermostat assembly saturn-03-22-4279.gif
  8. Twist the water feed pipe while pulling to remove it from the water pump. Remove the water pipe from the water pump assembly.
  9. Remove and discard the seals from the water pipe.
  10. Remove the inner thermostat sleeve.
  11. Remove the thermostat assembly.
To Install:
  1. Install the thermostat cartridge into the thermostat housing while aligning the cartridge tangs up with the thermostat housing bolt holes. This will assure the inner sleeve can be completely installed.
  2. Align and insert the inner sleeve notch into the thermostat housing. If the inner sleeve notch is not properly positioned, the sleeve will not completely seat into the housing.
  3. The water feed pipe seals can be slightly lubricated with silicone gel to aid during installation. Install a new O-ring on the water pipe.
  4. Position the water pipe into the water pump assembly.
  5. Seat the water feed O-ring by pushing and twisting toward the water pump. Take care not to tear or damage the O-ring.
  6. Install the thermostat housing cover to the water pipe. The water feed pipe has a locating tab to assure proper alignment.
  7. Install a new thermostat housing cover seal into the recess groove.
  8. Position the thermostat housing cover into position.
  9. Install the thermostat housing cover bolts and tighten bolts to (89 in-lb 10 Nm).
  10. Install the exhaust manifold heat shield.
  11. Fill the cooling system.

Dec 24, 2010 | 2002 Saturn VUE

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

1 Answer

Overheating,how would change the thermostat


YOU NEED A HAYNES REPAIR MANUAL.BUT YOU DRAIN OUT SOME COOLANT DOWN ENOUGH WHEN YOU TAKE THERMOSTAT HOUSING OFF TO GET TO THERMOSTAT.ANTIFREEZE WONT GO EVERY WHERE.TO GET STARTED YOU HAVE TO REMOVE RADIATOR SUPPORT COVER.AND THE AIR FILTER HOUSING.LOOSEN THE HOSE CLAMP.THEN DETACH THE HOSE FROM THERMOSTAT HOUSING.THEN REMOVE THERMOSTAT COVER MOUNTING BOLTS THEN REMOVE HOUSING.BE PREPARED FOR SOME COOLANT TO SPILL WHEN YOU REMOVE HOUSING AND BREAK THE SEAL.BE SURE TO REMOVE ALL TRACES OF OLD GASKET MATERIAL AND OR SEALANT FROM HOUSING COVER.THEN INSTALL THE NEW THEERMOSTAT IN THE HOUSING WITHOUT USING SEALANT.MAKE SURE SPRING END IS DIRECTED INTO THE HOUSING.APPLY CLEAN ANTIFREEZE TO THE NEW O - RING ON THERMOSTAT FOR LUBRICATION BEFORE INSTALLATION.PUT EVERYTHING BACK VISA VERSA.TORQUE THERMOSTAT HOUSING BOLTS TO 89 INCH POUNDS.PUT HOSES TIGHTEN HOSE CLAMP.FILL UP THE COOLANT SYSTEM CRANK CAR CHECK FOR LEAKS.

Feb 16, 2010 | 1998 Cadillac DeVille

1 Answer

How do i change my thermostat on my 2001 pontiac aztek. also how do i remove the crossover exhaust pipe to get to the @#$%^ing thing?


Exhaust Crossover Pipe Replacement
Removal Procedure
  1. Disconnect the battery ground (negative) cable.
  2. Remove the throttle body air inlet duct.
  3. Drain the coolant from the cooling system.
  4. Remove the inlet radiator hose from the engine.
  5. Remove the thermostat bypass pipe.
  6. Remove the exhaust crossover heat shield bolts.
  7. Remove the exhaust crossover heat shield.
89160026

  1. Remove the exhaust crossover pipe studs/nuts.
  2. Remove the exhaust crossover pipe.
  1. Remove the air cleaner and duct assembly.
  2. Drain the coolant until the coolant level is below the thermostat.
  3. Remove the crossover exhaust pipe.
  4. Remove the radiator hose from the thermostat housing.
  5. Remove the thermostat housing bolts and clean any sealer from the bolt threads.
  6. Remove the thermostat housing and gasket.
Removal Procedure

89153578

Dec 11, 2009 | 2003 Pontiac Aztek

2 Answers

Help changing thermostat 2002 chevy venture


THERMOSTAT REPLACEMENT

Removal Procedure
1.Remove the air cleaner and duct assembly.
2.Drain the coolant until the coolant level is below the thermostat. Refer to Draining and Filling Cooling System .
3.Remove the crossover exhaust pipe.
4.Remove the radiator hose from the thermostat housing
5.Remove the thermostat housing bolts and clean any sealer from the bolt threads.
6.Remove the thermostat housing and gasket.
7.Remove the thermostat.
8.Clean the mating surfaces.

Installation Procedure
1.Install the thermostat.
2.Install the thermostat housing and gasket.
3.Install RTV sealer, GM P/N 1052366 or the equivalent, to the thermostat housing bolt threads. .
4.Install he thermostat housing bolts.
Tighten
Tighten the bolts to 25 N.m (18 lb ft).
5.Install the radiator hose to the thermostat housing.
6.Install the crossover exhaust pipe
7.Install the air cleaner and duct assembly.
8.Fill the cooling system. Refer to Draining and Filling Cooling System .
9.Inspect the cooling system for leaks. Repair as necessary.


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Mar 30, 2009 | 2002 Chevrolet Venture Passanger

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