Question about 1996 Saturn SL

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Car runs hot - can overheat

After I bought the car I discovered there was no thermostat in the t-stat housing. I installed a new thermostat (185F) and now the car runs hot. On a hot day the aux. fan will come on and it will still overheat - or almost.

New radiator, no leaks in radiator or hoses, fluid level is normal.

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Try a Temperate sensor. Saturn's are noted for lemon Temp sensors.

Posted on Nov 04, 2008

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Try flushing the cooling system and then bleed the cooling system. hope this helps.

Posted on Oct 28, 2008

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What do I need to change thermostat in a dodge durango magnum 5.2


if its the stat then you will need a 13mm socket and ratchet with extension to remove the bolts that hold the stat housing to the motor. a drain bucket to drain the cooling system below the level of the stat, remove stat and clean surfaces on both the housing and motor. install the new stat and gasket reassemble in reverse order and refill the cooling system and run engine to operating temp and make sure all air is out of system.

May 25, 2014 | 2000 Dodge Durango

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I just changed my radiator and I put coolant in the car ndd ii tried to drive the car and itt still runs hot ohh and ii bought a new radiator cap and put it on why is itt still qettin hot and itts a 1997


Hi, sounds as if the thermostat is stuck and not opening up to circulate coolant, after engine has reached normal temperature, feel hoses on either side of thermostat housing and if engine side is hot and radiator side is not , it's not opening, it will need to be replaced, do not overheat engine!

May 30, 2011 | 1997 Toyota Avalon

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Is there a sensor that controls the opening and clsing of thermostat of 1995 acura legend? i just replaced thermostat and coolant is still backing into overflow after running for a while


The thermostat is a self-contained unit.

I had a problem on an Aries K with a bright shiny new thermostat. Still badly overheated on waiting for the 1st opening of the t-stat. Turns out there was steam in the housing on the hot side of the t-stat, which could not heat the t-stat as well as the cold water on the radiator side could cool it.

Check to see whether the top radiator hose is warm-to-hot while the reservoir is getting filled. If the hose stays cold, the t-stat is not opening. If that is the case, you might be having a steam bubble behind the t-stat. Drilling a small hole (maybe 3/32") in the main flat part of the t-stat, and installing it so that that hole is as high as possible will probably be a fix.

As soon as the upper hose gets hoat, fell the front surface of the radiator to see whether there are hot and cold parts. If there is a lot of difference, you might have some blocked tubes.

Make sure the bottom hose is not collapsing.

Some arrangements really rely on flow through the heater core to create the circulation that brings hot water to the thermostat when it has not yet opened. Without that flow, the water around the combustion chambers and cylinders can overheat due to the lack of circulation. Feeling the temperature of the heater hoses while the engine is first warming up can confirm whether you have sufficient flow there.

Jun 15, 2010 | 1995 Acura Legend

1 Answer

How replace thermostat


Follow the upper rad hose to the engine and that housing there contains the thermostat. It is kind of hard to get to but it depends on you. Be sure to put the spring on the new thermostat TOWARDS the engine. 3 tools should be needed for this job..screwdriver (flat head), 8mm deepwell socket w/extensoin and maybe some pliers to rotate the radiator hose clamp away from 1 of the 2 bolts required to remove the t-stat housing. Step 1. remove the airbox assy. just loosen the clamp with a screwdriver at the throttle body, a pull back the airbox assy and unhook all the elec connectors. under the throttle body you will see the radiator hose leading to the t-stat housing. it's a little tricky to get to, but should not be a problem if the hose clamp is not in the way of one of the bolts. if it is, just rotate the clamp by sqeezing it with pliers. (that's the hard part) but hopefully it won't be in the way. step 2. remove the bolts with an 8mm deepwell socket. you'll need a deepwell cuz the bolt on the left is also used to hold a clip for the spark plug wire holder otherwise known as a "stay". REmove the plastic stay to get to the bolt. then remove the 2 bolts and pull the housing back with the hose still connected. step 3. remove t-stat and any gasket material so that both surfaces are clean. step 4. replace t-stat and gasket. use gasket sealer with the gasket that comes with the t-stat.. re-assemble everything and you are done.
NEVER EVER REMOVE a radiator cap from a
WARM/HOT ENGINE!!
What to look for:
  • If the vehicle has a radiator cap - run the engine with the cap off and watch for coolant flowing past the opening. This is a good thing - the thermostat if fine

    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. Be ready to put the radiator cap back on.

  • Feel the top of the radiator hose 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.
Procedures:
  1. Drain enough coolant (into a clean container) to get below the level of the thermostat housing
  2. Remove the upper radiator hose from the thermostat housing. See TIP below
  3. Remove the mounting bolts and remove the thermostat housing.
  4. CLEAN BOTH SURFACES of ALL gasket material! Any gasket left behind will likely cause a leak.

    NOTES:
    * Compare the size of the thermostat to the old one - make sure the new one matches up
    * Ensure the thermostat fits into the groove in the block or outlet housing.
    * The spring side faces the block - If the thermostat is installed backwards, the engine will overheat

  5. Install the gasket - DO NOT USE RTV sealant

    NOTE - When a paper gasket is used and the recess is in the thermostat housing, it is a good practice to position the thermostat into the recess and glue the gasket to hold it in place. If it falls out of its groove during installation, the outlet housing can be cracked or a coolant leak will result. Before tightening the water outlet housing, try to rock it back and forth to be sure it is flush. Housings are often cracked during this step.

  6. Reinstall the thermostat housing bolts - tighten evenly

Sep 10, 2009 | 1995 Ford Windstar

2 Answers

High mileage 1996 Ford Explorer v8 overheats at 75-80 mph


if your mechanic seen no leaks from hoses or thermostat housing its sounds that either your fan clutch or your thermostat is bad. if its heats will driving streets and not highway its your fan clutch and needs to be replaced. if it overheats in streets and highway its your thermostat and needs to be replaced,you will need a thermostat and gasket with some silicone. Drain, follow the radiator hose to the housing and take 3 bolt off, clean housing well,CAREFULLY install the t-stat exactly the way is was taken out (pic), gasket,sillicone, bolt. ecc3d0c.jpg   its an easy job. Good luck!

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2 Answers

Responce for clarification


You'll only see good circulation when it's at operating temperature & hot enough for thermostat to open, allowing coolant to flow through the system. Hope you had heater on (not defrost) while you were letting it run/circulate. I usually wait for rad fan to come on 2 or 3 times, before I put cap back on. Rad fan comes on to cool what just came out of engine when thermostat opened, so when you see good flow, you'll probably see fan come on shortly after.

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1 Answer

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Try REMOVING the thermostat... if this cures the problem then the thermostat was faulty or incorrectly installed or the wrong T-stat. If this does NOT fix it then suspect a clogged radiator... (this would explain why the fan doesn't come on.. the thermostatic switch in the radiator doesn't warm up!)

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1 Answer

Need new thermostat


drain anti freeze follow upper radiator to the t-stat housing take off hose then 2 -13mm. bolts pull off housing there will be the t-stat pull out then clean housing put in new t-stat and gasket.then hose fill up slowly with antifreeze let run at 2000 rpms for 3 minutes with heater on hot air once you get heat your done.please rate this answer thanks.

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1 Answer

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You should be able to locate it where the upper radiator house attaches to the engine. At this point there is a clamp holding the hose onto a housing, remove the clamp, remove the hose, there are usually 2 bolts attaching the thermostat housing to the engine, remove the 2 bolts to remove housing, and reveal thermostat. To install a new t-stat, make sure it faces the proper direction, as u can install it backwards and the car will overheat.

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Thermostat radiatot


look for bleeder valve on thermostat housing or other coolant hoses or lines. possible traped air in cooling system,will cause car to run hot.

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