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When replacing the thermostat, should the gasket be attahed to house or the block

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Hi, does not matter which side ( housing / block ) the gasket is on when you install, as long as the gasket is in there.

Posted on Oct 14, 2010

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MOST NEWER VECHICLE THERMOSTATS HAS A O-RING ON THERMOSTAT.DONT NEED GASKET. IF YOUR VECHICLE HAS PAPER TYPE GASKET.PUT A SEALER ON BOTH SIDES OF GASKET.THE GASKET ATTACHED TO HOUSING THEN TO ENGINE BLOCK.

Posted on Oct 14, 2010

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1 Answer

Where is thermostat on 05 Chrysler 300 3.5 v6


Find the lower radiator hose where it leaves the radaitor. Follow it to the lower engine block. The lower hose is connected to the t-stat housing. See the NOTES below for special instructions.

To Remove:

  1. Disconnect the negative battery cable.
    WARNING
    Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
  2. Drain the cooling system.
  3. Raise and safely support the vehicle.
  4. Detach the electrical connectors from the engine oil and power steering pressure switches.
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  6. Remove the thermostat housing bolts.
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    NOTE The OEM thermostat is staked in place at the factory. To ensure proper seating of the replacement thermostat, carefully remove the bulged metal from the thermostat housing using a suitable hand held grinder. It is not necessary to re-stake the replacement thermostat into the thermostat housing.

    To install:
    1. Thoroughly clean the gasket mating surfaces.
    2. Position a new gasket on the thermostat and housing.
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    5. Install the bypass hose.
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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.

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How to replace Thermostat on 2006 Town & Country Van ?


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1 Answer

Change thermostat on 2005 pt cruiser


    • 1 Pop the hood and locate the thermostat. It's on the passenger side of the engine and has a plug leading into it.
    • 2 Unplug the thermostat housing from the engine block using the 3/8-inch ratchet and socket set. The housing will come off in your hand and then you can pull out the old thermostat.
    • 3 Scrape off the engine block and the thermostat housing's mounting surfaces with the gasket scraper. This is to ensure the replacement gasket seals correctly.
    • 4 Place the replacement thermostat into the engine block and place the gasket over the ends of the bolts in the thermostat housing to keep them aligned.
    • 5 Bolt the thermostat housing into the engine block using the 3/8-inch ratchet and socket set.

Read more: How to Change the Thermostat on a PT Cruiser ' eHow.com http://www.ehow.com/how_5643178_change-thermostat-pt-cruiser.html#ixzz1g9B0K8Go

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1 Answer

How to install thermostat


The best thing to do is to buy a Haynes or Chilton manual for your vehicle.

Purchase the replacement thermostat and gasket (no they do not come as a set.)
Items needed: socket and ratchet, a tube of liquid gasket, a wire brush, screwdriver for hose clamp

Open the hood, disconnect the Neg terminal of the battery (not the red one)
The radiator accept hot water at the top and feeds it to the water pump on the bottom.
Most thermostats are located on the engine block at the other end of the water hose going to the top of the radiator.
Trace it back, and remove the hose clamp.
Pull the hose clamp back (you do not need to take it off)
Pull the hose off the thermostat hosing neck.
The housing will be held on by 2 or 3 bolts, remove the bolts to remove the housing
BEWARE OF THE ORIENTATION OF THE .THERMOSTAT
The thermostat should come loose.
There will be gasket material stuck to the housing and the engine block, it must be scraped off before installing the new gasket.
Compare old thermostat with new one. Make sure they match.
A good tip is to stress the new thermostat in boiling water to insure it works. Boils some water, and place the thermostat in the water and watch it open. pour out the water, run it under cold water to cool it off.
After using a wire brush to remove the old gasket material,
place liquid gasket along the edge of the engine block opening and place the new gasket on the opening.'
Place the new thermostat in place (IT MUST GO IN ONE WAY)
Place the housing back on the engine block and replace the bolts, (tighten the bolts gradually )
replace the hose on the neck, and replace the clamp and tighten.
remove all tools and reconnect the battery

Good luck and don't forget to vote.

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1 Answer

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JUST DRAIN COOLANT LEVEL BELOW THE THERMOSTAT. CATCH COOLANT IN A DRAIN PAN UNDER RADIATOR.THEN REMOVE RADIATOR HOSE FROM THERMOSTAT HOUSING ON THE CYLINDER BLOCK.THEN REMOVE THERMOSTAT HOUSING AND THERMOSTAT.CLEAN THERMOSTAT HOUSING SURFACE AND THERMOSTAT HOUSING SEALING SURFACE ON CYLINDER HEAD.INSTALL NEW THERMOSTAT IN PLACE,MAKE SURE THERMOSTAT AIR BLEED HOLE FACING LEFT SIDE UPWARD ON THE ENGINE.SOME THERMOSTAT HAS TOP STAMPED ON IT.MEANING MUST BE FACING UP.WHEN THERMOSTAT IN PLACE.TAKE NEW THERMOSTAT GASKET.PUT SEALER ON BOTH SIDES OF GASKET.THEN.PUT GASKET ON THERMOSTAT HOUSING.THEN PUT HOUSING IN PLACE TORQUE HOUSING BOLTS 16 - 20 FT LBS.WAIT 1 HOUR UNTIL GASKET SEALER CURE.THEN FILL UP COOLANT SYSTEM.BLEED COOLANT SYSTEM AND CHECK FOR LEAKS.

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1 Answer

Need to replace a Thermostat on a 2001 PT Cruiser. Have the new Thermostat need insturctions on how to do the replacement.


Most thermostats are located in the upper radiator hose housing mounted to engine block. Make sure engine is cold put a catch pan under your car to catch any antifreeze that comes out. Remove the two bolts holding the housing on the engine and remove thermostat and gasket. Clean engine block where gasket goes very good and also the housing, have to remove all gasket material so when installing new one it will seal and wont cause a leak. Make sure when you put the thermostat back in it goes in spring side down towards engine. Replace housing and bolts. replace lost coolant with a 50/50 mixture in your recovery tank. Start engine let heat to temp and check for leaks.

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1 Answer

Buick is overheating


Follow the radiator hoses from the radiator to the block. Check the upper radiator hose first. At the end of one of these hoses will be a housing to which the hose is connected. The housing is bolted to the block. The thermostat is in that housing.


Remove termostat housing bolts. Note orientation of old thermostat. Clean gasket material off housing and block. Put on new gasket, install thermostat. Replace housing, etc.

You may have to disconnect/remove other parts to get to the housing botls, maybe not.

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1 Answer

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Hello julioaguero1. To change the thermostat in your Pontiac Grand Am SE 2000; The thermostat should be located near the front of the engine, to the rightfront or leftfront of the intake manifold. Look for a hose running toward the radiator from this position. Once located, remove any brackets that may be in the way for removal of thermostat housing. Take the hose off of the housing (not necessary to remove from radiator unless putting a new hose on)There should be two bolts on the housing. Take up the two bolts. Since the housing has a gasket, use a small gasket to carefully pry the housing from the block. Make sure not to gouge the block or the housing as it could cause a leak after re-installation. Once removed, clean the housing where the gasket will go, as well as the area around the block - you may want to insert a small cloth into the hole, to avoid any debris from falling into the water. Some thermostats have a seal they sit on that will be inside the block just under where the gasket sits (if so, one should be provided with the gasket and thermostat (new). If not, double check just to make sure. If there is one, first feel the one that is inserted for any damage (may not be able to see due to the water); if you don't feel any cracks, rips or any feelings of damage, you can eithe leave it in, or insert the new one. If you put the new one in, you will need to obtain the proper tool for removal (see local auto parts store); with the block dry for the gasket, apply a light coat of gasket to the block (and/or gasket) and apply the gasket. Let sit 5-10 minutes to dry. Making sure the thermo stat is clean and dry (free of any debris, cuts, gouges) (use a straight razor for cleaning this areas as well as well as the block) put the housing over the thermostat (apply sealer to housing as well first), and bolt down. attach hose, refill radiator with water and antifreeze are recommended for your vehicle (see owners manual, or service manual for these specifications).
I hope that this information proves useful in the success of the thermostat replacement process for your Pontiac. I would like to thank you for choosing fixya.com to help you in this matter. Please let me know if you have any questions, comments or need any further assistance. Thank you, and also feel free to rate this information at your convenience and your desire of level. Be honest. Thank you.

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1 Answer

How do you change the thermostat on a 98 ford ranger 2.5L


CAUTION If the radiator is filled to the top with coolant and the engine is run without the radiator cap in place, the coolant will expand and spill over as the engine warms up.

  • Drain some coolant into a clean container until the coolant level is below the thermostat housing.
  • Remove the upper radiator hose connection from the thermostat housing.
  • Loosen the housing bolts and remove the housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Some engines use a rubber O-ring to seal a thermostat housing.
  • Compare the size of the thermostat to the old one. They are of different sizes, types, and temperature ratings.
  • The temperature rating is stamped on the sensing bulb on the bottom of the thermostat. The temperature bulb faces the block.
  • When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing. If the thermostat is installed upside down, the engine will overheat.
  • Install the gasket.
  • Reinstall the thermostat housing. Refill the system and run the engine or pressure test to check for leaks.
  • When the engine has reached operating temperature make sure the thermostat opens.
  • You should be able to see coolant circulating within the radiator.
  • Another way of checking thermostat operation is to feel the top of the radiator hose or use a thermometer or multimeter with a temperature probe to confirm that the coolant is warming up.
  • If the engine is overheating, but the top hose is still cool to the touch, the thermostat is stuck closed and must be replaced.


When replacing the thermostat, also replace the gasket that seals the thermostat in place and is positioned between the water outlet casting and the engine block.
Generally, these gaskets are made of a composition fiber material and are die-cut to match the thermostat opening and mounting bolt configuration of the water outlet. Thermostat gaskets generally come with or without an adhesive backing. The adhesive backing of gaskets holds the thermostat securely centered in the mounting flange, leaving your both hands free to align and bolt the thermostat securely in place.
  • Remove the thermostat housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If any gasket remains on either of the surfaces, there will probably be a coolant leak after reassembly.
  • Some engines use a rubber O-ring to seal a thermostat housing.
  • Install the gasket.
Hopefully this is helpfully

Nov 17, 2008 | 1998 Ford Ranger SuperCab

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