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How do you know when thermastat needs to be replaced

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Well, your car either over or under heats. A thermostat can fail in any position, open, closed, or partial.... They are fairly cheap, so many times it is just replaced, even as a diagnostic step.

This is the time to get the cooling system flushed. The new stuff, red, gels up as it gets old, have a lube shop do the flush, they can contain the old stuff and dispose of it properly.

Some thermostats are in somewhat fragile housings. Just be gentle. Get all of the old gasket off, if yours has a gasket and not an o ring.

Posted on Oct 28, 2012

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Replace thermastat


you will need to remove the exhaust manifold in order to get to the water pump that sits on the thermastat. Once you get the manifold off you will see the water pump there will be 4 bolts that hold the belly to the pump remove them and left it up the thermastat is under it.

Nov 30, 2010 | 1998 Pontiac Grand Am

2 Answers

How much des i cost to fix a theremastat on a 2002 cadillac dhs? Is this something I can fix myself? Sean urban.po@gmail.com


yes, you can do it with minimal tools. First though, please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Here is the procedure for your car:
  1. Disconnect the negative battery cable.
  2. Drain the coolant.
  3. Remove the air intake duct.
  4. Disconnect the radiator hose
  5. Remove the thermostat housing.
  6. Remove the thermostat.
  7. Clean all sealing surfaces.
    6cf4e79.gif

Fig. Thermostat and housing-typical

To install:

  1. Install the thermostat.
  2. Install the thermostat housing using a new gasket.
  3. Install the thermostat housing bolts and tighten as follows:
    1. 1999 models: 15 ft. lbs. (20 Nm)
    2. 2000-05 models: 89 inch lbs. (10 Nm).

  4. Connect the radiator hose.
  5. Install the air intake duct.
  6. Refill the coolant.
  7. Connect the negative battery cable.
  8. Start the engine and check for leaks.

Oct 08, 2010 | 2002 Cadillac Deville

4 Answers

I need to know where the thermostat is located on the engine


follow top radiator hose to engine where hose stops thats where the tstats at.

Sep 03, 2010 | 1997 Cadillac DeVille

2 Answers

Where is the thermostate located on a 1998 cadillac catera 3.0 v6 engine


Hi Friend:

To Locate your thermastat, Open your Hood and look down at the top of your radiator.You'll see a Top Raditor Hose that goes from your radiator to your Thermastat Housing.

You'll see a Hose clamp on the Thermastat housing .

NOTE: before you loosen the Hose Clamp Make sure you your car is cooled down and remove your radiator cap to release any pressure that is in your system.

After the Hose is off you'll see a Domed shaped Housing that is your Thermastat Housing. Remove the Bolts that Hold the Housing on and Seals the Cooling System.From Leaking out of the Housing.

After removing the Housing you'll see your Thermastat .Just remove it and Clean up all old gasket Material so you can replace the gasket with your new one .But put in your new thermastat 1st.

Then make sure you seal the gasket with Gasket Glue. And Replace the Housing Bolts and Tighten up good and Sung.

Put back on your hose then clamp.And Refill your Radiator with Coolant.

This will get your new thermastat in and get you Ready to go .

Thanks for using FixYa Please let me Know how my Solution helped you.By Voting .

Thanks Again From: d_hubbs

Aug 22, 2010 | 1998 Cadillac Catera

1 Answer

Need to know how to replace thermostat


Hi: You'll first want to Drain your Radiator take your radiator cap off so when drain it the coolant will drain freely.Then Drain your raditor you'll find a Drain Tee outlet on the inside bottom of your radiator. And catch the Coolant in a Drain Pan. Standing in Front of your Vehicle you'll see a Hose connected to your Radiator(UPPER RADIATOR HOSE) take your Hand and follow it down to your Engine until you locat a Hose Clamp Remove the hose clamp and work off the top Radiator Hose.Where you removed the hose theres a Dome Shaped Metal Housing,with 2 bolts in it. Take those 2-Bolts out and Remove the Dome Thermastat Housing,Under it You'll Find your Thermostat it shuold come out with a little Resistance. Once its out, Clean Up The Thermastat Dome of any Gasket still left on it, and clean where you remove the Thermastat Surface.To put back just Reverse the Removal Be-sure your Thermastat is put in right and not up side down.Then get some Gasket Sealer Put a Little on the Thermastat Housing where gasket goes and some on the Enging surface and Install your New Thermastat,Be careful when Tightening the 2-Bolts on The Housing. not to Over tighten them.The torque Specs on the 2 bolts range between 10- 15 Foot pounds.You don't want to Strip,
After you get your New Thermastat in and your Radiator Hose on and Clamped.Make Sure you have closed the Drain outlet. then fill with coolant,if your coolant is old i recommend putting new coolant in. I hope this helps You.I;m Sure it Will, But please let me Know through FIXYA by Voting and a Testamony.This way I'll know that my solution was Helpful. Thanks From d_hubbs

Jun 06, 2010 | 1997 Chevrolet Monte Carlo

1 Answer

1995 toyota 4runner gets hot with new thermastat gasket


the thermostat should be closed when you take it out, therefore the thermostat is bad. It does not closed.

May 22, 2009 | 1995 Toyota 4Runner

1 Answer

1997 jeep TJ, thermostat


about 10-20bucks ez fix buy a new thermastat replace it, if that doesnt work ,then get a coolant flush....if you need help locating the thermastat.. go to ask.com and ask where is the thermastat on """"""""""""///(your veh)

May 18, 2009 | 1997 Jeep Tj

1 Answer

Thermastat were is it


well - I do not know but if you go to service shop they will show you on diagram- are you sure you need one?

Nov 05, 2008 | 1997 Saab 900

1 Answer

Hyundai Accent Radiator Thermastat


the thermostat is located at the rear of cylider head.connected to upper hose

Jun 18, 2008 | 2000 Hyundai Accent

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