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Thermostat sticking closed with a new thermostat in place

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Check that thermostat is correctly installed--''pellet'' towards motor,spring towards radiator.check hose[s] aren't collapsing from pressure.

Posted on Sep 28, 2009

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If thermostat is stuck open will it make your engine cooling fan run constantly?

im assuming your speaking of the engines internal thermostat ? if this sticks open (not likely) then temp gauge on car will never reach operation temp and stay low on scale ( entire purpose of thermostat in first place) now if your coolant fan switch sticks closed (very likely) then your fan will run constantly and only shut off with the key

also another condition that makes them run more often is that engine temp gauge is over normal (showing) and this is an indicator that cooling system has a problem and needs service

Sep 29, 2016 | 1993 Geo Prizm

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How to change thermostat myself?

If the thermostat sticks in the open position, it doesn’t keep the liquid in the engine long enough, so you have trouble getting your car warmed up. If the thermostat sticks in the closed position, the liquid isn’t allowed to get to the radiator, and overheating results.

Because replacing the thermostat is quite simple and thermostats are quite inexpensive, you may want to try this task before you take more drastic measures. Just be sure that you do this when your engine is completely cooled.

1Locate your thermostat if you haven’t already done so.
Most thermostats are located where the top radiator hose joins the engine, so these steps deal with this type. If your thermostat is in the bottom radiator hose, the principle is the same.

2Place a bucket under where you're going to be working.
Some fluid will escape, so have a clean two-gallon container handy to catch it, and return the fluid to the radiator when you finish the job.

3Remove the clamp.
Follow you radiator hose to where your thermostat is located.

4Pull off the hose.
This is when some fluid will escape and drain into your bucket.

5Remove the bolts that hold the thermostat housing in place and lift out the old thermostat.
Compare the new thermostat and its gasket with the old ones. If the new thermostat and the gasket that’s included with it aren’t exactly like the old ones, go back to the store for the right ones.

6Lay the new gasket in place.
There’s a gasket around the hole where the thermostat was located — take that off, too. Scrape off any pieces of gasket that may be stuck, but be sure not to let these pieces fall into the hole!
7Drop in and secure the new thermostat.
Make sure to place the spring-side down; then replace the bolts.

8Replace the hose and hose clamp.
If your hose clamp uses screws, screw it down tightly but not tight enough to cut into the hose.

9Replace whatever fluid ran out of the hose by pouring it from the container into the radiator fill hole or coolant reservoir.
Be sure not to pour it on the ground where children and animals can be endangered by it. If you accidentally spill fluid, wipe it up thoroughly before hosing down the area, and then place the rags in a sealed plastic bag before disposing of them.

Aug 11, 2015 | 2004 Dodge Stratus

1 Answer

When in traffic and the heat gauge gets halfway then the idling gets intermitent and actually jerks around when idling.captiva 2007 2.4 south africa

That's just your computer thinking the engine is overheating and it's only placing it in what they call "Limp Home Mode".You just need to address the heat rise situation,it should not rise.Thermostat cares for that.Thermostat could be sticking and staying too far to the closed side.Replace the thermostat(V-6 can be hard to get to one bolt head but can be done with a box-end 12point wrench)and be patient with it.

May 14, 2014 | Cars & Trucks

2 Answers

2003 Cooper S overheated in minus 30 celcius

The first thing to check is if the coolant is at the right level and then you will need to replace the thermostat. The thermostat is old and probable sticking closed but also the water might be freezing in the car around the thermostat and causing it to stick closed. One thing that you can do to stop that is buy strait antifreeze and add water yourself buying fifty fifty mix is not good it is 25% coolant and 3/4 water. When you mix your self you can get a good fifty fifty mix that will not freeze. The coolant that you are loosing is coming from the over flow tank so keep it full. Replace the Thermostat every year and a half will make sure that it will never ware out and stick again.

Jan 28, 2014 | Mini Cars & Trucks

1 Answer

Where is the thermostat located in the 06 stratus

  • Find the location where the upper radiator hose connects to the intake manifold of the engine by tracing it from the radiator to thermostat intake housing bolted to the intake.
  • 2 Remove the radiator hose from the thermostat intake housing by loosening the band clamp that secures it into place. With the clamp loosened, pull the hose off the housing.
  • 3 Remove the two bolts that secure the housing to the intake manifold and then lift the housing off the intake.
  • 4 Lift the thermostat out of the intake manifold and place the new thermostat into the hole. The end of the thermostat with the pin protruding from it sticks out of the intake manifold.
  • 5 Lift the thermostat intake housing gasket off the intake manifold and place the new one onto the intake manifold.
  • 6 Place the thermostat intake housing onto the intake manifold and bolt it into place. Reconnect the hose using the band clamp.
  • Six-Cylinder Engines
  • 1 Drive the Dodge onto a set of front-end ramps and secure the parking break. Allow adequate time for the radiator fluid to cool down. Thirty minutes is usually adequate.
  • 2 Loosen the petcock on the lower right hand side of the radiator and drain all of the radiator fluid into a drain pan. Close the petcock once drained.
  • 3 Trace the lower radiator hose to the location where the hose connects to the engine block. The metal housing the hose connects to is the lower thermostat outlet. Remove the hose from the outlet by loosening the band clamp and then by pulling the hose off the outlet. Be careful--some fluid will drain from the hose.
  • 4 Remove the two bolts that secure the thermostat outlet to the engine block and pull the thermostat outlet off the block.
  • 5 Discard the O-ring inside the bottom edge of the thermostat outlet and place a new one into the outlet.
  • 6 Pull the thermostat out of the engine block and replace it with a new one. The end with the pin protruding from it sticks out of the engine block.
  • 7 Place the thermostat outlet onto the engine block and secure it into place. Reattach the lower radiator hose with the band clamp.
  • 8 Open the radiator filler cap located on top of the radiator and fill the radiator with the fluid previously drained from the system.

  • please dont forget to give good rateing thank you

    Dec 28, 2010 | 2006 Dodge Stratus

    1 Answer

    Thermostat sticking closed, engine overheating

    Follow the upper radiator hose to the fitting it is attached to. It should have a dome shape to it. remove two bolts on either side and pull out thermostat housing. the thermostat is right there. Replace thermostat and gasket. Be sure to point large copper colored end with the bimetal spring towards the engine when installing new one. Replace housing cover and tighten down bolts. Start and run engine. at some point, the thermostat will open and the upper hose will begin to get hot to the touch. after this hot water is cycled into the radiator, one electric fan should kick on for about 30 seconds and shut off. This just cooled off the next incoming charge of water to go into your engine. To test your old thermostat place into a pan of nearly boiling water. you should see it open up if it works. If not, then you did the right thing and should run normal temps.

    Nov 14, 2010 | 2003 Dodge Intrepid

    1 Answer

    Thermostat replacement

    HI there,

    Well first of all you may please follow the steps below -

    1. Remove the upper radiator hose from the thermostat intake tube by loosening the retaining clip with a screwdriver. Slide the clip toward the radiator and pull the hose off the thermostat intake tube. 2. Remove the two 10-mm bolts that hold the thermostat intake tube onto the intake manifold of the Hyundai Accent. Pull the intake tube off the intake manifold and inspect it for cracks. If any cracks are present, then you need a new thermostat intake tube.
    3. Pull the old thermostat and thermostat gasket off the engine with your hands and replace them both with new ones. The thermostat will be marked with "top." This end should stick out of the engine. 4. Place the thermostat intake tube back onto the intake manifold of the Hyundai Accent and bolt it back into place. 5. Slide the radiator hose back on to the thermostat intake tube and secure it in place with the retaining clip. A band clamp can be used in place of the retaining clip for extra clamping pressure. Post comments for further help or information............

    Good Luck!!

    Thanks for suing FixYa!!

    Oct 13, 2010 | 2003 Hyundai Accent

    1 Answer

    My Daughter 1998 ford fiesta zetec temperture guage stayed at the very bottom of the guage all and only raised late this afternoon, i've told her that it was because she had ony driven for a short time and...

    Sounds like the thermostat is failing.

    Thermostats fail in 2 ways: (a) sticking open (b) stick closed

    Your seems to be sticking open - and so the engine warms up VERY slowly,
    but still throws a little heat out the vents - less heat over time so that
    your daughter didn't even notice the gradual decrease over time.

    If you can replace the thermostat on your own, your cost may be less than $5.
    To get a new thermostat (always buy parts on your own - the garage will charge a
    50% surcharge on any parts they have to locate for your car), try Wal-mart first
    (they sell a few thermostats for a few cars), then any auto parts place.

    Replacing a thermostat in a 1998 Fiesta ZTEC engine should be the first thing
    a DIY mechanic learns after figuring out how to do regular maintenance items - since
    stuff like distributor cap/ distributor rotor/ thermostat are actually regular maintanance
    items - destined to have a limited life span, like any moving part.

    Oct 12, 2010 | 2011 Ford Fiesta

    1 Answer

    1996 honda accord heater

    you likely have a stuck thermostat.........when they stick open the engine wont reach operating temp and when they stick closed the engine will over heat...........your cheapest and most likely place to start is with replacing the thermostat
    hope this helps!

    Dec 30, 2008 | 1996 Honda Accord

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