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The thermostat is not circulating the coolant fluids which is causing the engine to heat up

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  • Jimmy Verdugo
    Jimmy Verdugo Apr 15, 2014

    sometimes there is an arrow of directon on the thermostats, make sure it in the housing the right way. also check the water pump, make sure its not leaking out from a little on the housing it self.

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  • Contributor
  • 37 Answers

Replace the thermostat, it might be stuck in closed position. Don't mix tap water with antifreeze, as minerals will cling on to your hot engine.

Posted on Apr 15, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Richie_asg1
  • 1036 Answers

SOURCE: 1996 Buick regal over heating

Hi,

Check the sensor and wiring from it for a short.

Hope this is an easy fix for you.

Posted on Jun 15, 2008

  • 1 Answer

SOURCE: little heat from heater

I had the same thing for two winters couldn't get good heat then the HEATER CONTROL VALVE,
up near the master cylinder, cracked and started leaking. I replaced it this summer and now the heater is working like new.

Posted on Nov 14, 2008

  • 1779 Answers

SOURCE: no heat,ch.thermostat,water is circulating,blower goin strong .

Check the 'heater control valve'. This valve opens when u turn on the heat switch on the dash, so the hot coolant will flow thru the heater core and provide heat. So although the coolant is circulating in the engine, the valve controlling the flow to the heater core is stuck closed, or not working.

Posted on Nov 15, 2008

c17hydro
  • 2984 Answers

SOURCE: 97 Cavalier engine heats up and blows coolant out plastic reservo

Check your oil and see if it is milky lookinig...that is a sign of a bad haed gasket....here is the location of the thermostat...unless a different engine size...then post what you have and I'll get you the diagram here:

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Posted on Jul 12, 2009

Nomodo4u
  • 863 Answers

SOURCE: Dodge 2002 Grand Caravan V6 3.3 engine overheating/no cabin heat.

Replace the bad radiator hose first.  Second- get you special formulated anti-freeze dye from the auto store and pour it into the radiator.  Third- make sure you got all the air pockets out of your system, cause the coolant system won't work with air pockets in it.  Fourth- Check for leaks by looking for the colored dye.  If it's not the radiator hose, then could possibly be a pin hole in your radiator.  Would suggest replacing all the radiator hoses at the same time while you got the coolant system disconnected, cause you don't want to have to come back and replace another hose in a few months.

Posted on Nov 06, 2009

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2 Answers

WILL A BLOWN HEATER CORE CAUSE A CAR TO OVERHEAT


No a heater core alone will not cause a vehicle to overheat. The heater cores sole purpose is to transfer heat generated by the engine to the blower motor so that you can get heat from your car vents. A person could technically remove the heater core from the vehicle and connect the hoses together to bypass it, and the car will run as if nothing happened, minus the lack of heat in the vents.

If the car is overheating, there are three mai issues that could be happening. 1) The radiator is blocked and not allowing coolant to be cooled off before returning to the engine.
2) The water pump is broken. The engine relies on this pump to move the coolant throughout the engine. It may not leak as long as the gasket is alright but the impeller ( small fans on the inside of the water pump ) could not be turning.
3) Lastly and most commonly is a faulty Thermostat. The thermostat is the valve which opens and closes at certain tempuratures and decides if hot coolant stays in the engine or circulates to the radiator to be cooled off. If the thermostat fails, unless you have a failsafe one, will fail in the closed position keeping the hot coolant in the engine and causing it to overheat.

The thermostat is by far the cheapest of the issues so consider changing that first along with a coolant flush before considering putting a new rad or waterpump. You can usually get a thermostat, 2 jugs of coolant and a flush kit for about 50$ at pretty much any parts store. Becareful however not to drive a overheating vehicle as gasket burning and head warpage can occur, which will require rebuilding th head.

Good Luck

Jul 14, 2012 | 2000 Dodge Neon

1 Answer

What is mean by thermostate valve


The thermostat is a critical part of your coolant system, the system that circulates water and antifreeze (coolant) through the engine to keep it from over-heating. It is called a valve because it can open and close, depending on how hot the coolant is acting upon it.
The reason to put a thermostat in the coolant system is to allow the engine to reach normal operating temperature quicker (and therefore operate at peak efficiency) than without a thermostat.
When the engine is cold, the coolant is at normal outside temperature, so the thermostat is closed. This means when you start the car, the coolant starts circulating through the engine, but can't flow into the radiator. With a closed thermostat, the coolant just keeps circulating around in the engine until the car warms up, the coolant gets hot, and the heat acts upon the thermostat, causing it to open at a certain temperature (about 185-195 degrees F.), With the thermostat now open, the coolant can now enter the upper radiatior hose and flow down the radiator to cool itself down, before going back into the engine through the lower radiator hose.
So the thermostat is always found on a car in the area where the upper radiator hose connects to the engine. Thermostat closed-water can't circulate through the radiator. Thermostat open- coolant is forced through the hose into the radiator.
I hope this helps you understand the thermostat valve and why all manufacturers include them.

May 27, 2012 | 2011 Fiat Punto Evo

2 Answers

Coolant doesn't circulate in raditor. Also coolant blows back through raditor.


the coolant is probably not circulating because either the water pump impellers are worn or broken off of the shaft,the rad maybe plugged or possibly the thermostat has seized closed causing a restriction in the system.the coolant blows back because its not circulating and over heating and will escape were it can.

Apr 10, 2011 | 1995 Pontiac Firebird

1 Answer

LOW COOLANT LIGHT COMES ON SOMETIMES AND TEMP GUAGE SHOWS ENGINE GOING TO OVERHEAT. HEATER GETS COLD. IS IT THE THERMOSTAT?


There may be a thermostat problem, but your symtoms indicate low coolant level. When coolant is too low, it will not circulate, so you get no heat in car, and the coolant remaining in engine block overheats because no cool fluid coming in.
You need to fill the system up properly then look for leaks.
With cold engine, open radiator cap. Fill with antifreeze directly in radiator. Start engine, top up rad if level drops. Put heat control on Hot. Fan on low, heat on high. Gently rev engine and top up rad as needed. IF as engine heats up, it starts kicking fuild violently out of radiator, then the thermostat is bad. if not, then recap radiator, top up overflow bottle and you're done. Look under car for any sign of leaks. Steady dripping indicates a leak, then address that.

Feb 27, 2011 | 1998 Chevrolet Monte Carlo

1 Answer

Temperature gauge needle dropped to the cold side for no reason. all fluids are good. then the check engine light went on.


Your thermostat sound like it is stuck open.
How it works is your thermostat is designed to be closed when your engine is cold.
After you start your car your engine coolant circulates in the engine block.
This helps the engine reach its normal running temperature.
When your engine reaches the normal running temperature the thermostat slowly opens allowing the coolant to circulate through your radiator. the radiator cools the coolant and maintains your engine temperature so your engine does not over heat.
If your thermostat is stuck open your coolant is not permitted to allow the engine to reach normal running temperature. Causing your low temperature reading.
Hope this helps please give feedback good luck FixYa

Feb 02, 2011 | 2006 Ford Explorer

1 Answer

Engine overheating, no hot air from heater, rad spits fluid out


Could be a thermostat issue, bad thermostat, causing coolant not to reach the engine once the engine heats up.
Could be a clogged hose or component, do a coolant flush
Could be a broken water pump, replace
Either way it sounds like water is not being circulated

Dec 17, 2010 | 1994 Ford Ranger Supercab

1 Answer

Heater not working,engine smells hot,temp gauge stays in blue zone


A. Do you have a Coolant Leak causing the smell? What is the Radiator Coolant Fluid Level? Have you been adding alot of Fluid?
OR
B. Replace the Thermostat. The Thermostat is stuck closed.

Either one A. or B. causing the:
1. Engine to overheat, because there is not enough fluid or the thermostat is stuck closed not allowing fluid to circulate.
2. Heat is not working because the heated (hot coolant) is not travelling to the heater core.

Jan 11, 2010 | 2002 BMW 3 Series

1 Answer

No heat


Over heat is caused by poor circulation of coolant. This problem can be: 1- The thermostat is not opening ( bad) causing coolant stagnant. 2- Water pump is bad, not circulate coolant. 3- Radiator is clogging up. It is full but water can not going through small clogging up tubes inside to have heat dissipated through the fines.
Since you also have no heat then I think the bad coolant causing the heater core clogged up also, unless the heater valve has a problem not allowing cooling flowing through the bypass hose to the heater core. Correct all 3 things above then you should be OK. Good luck.

Dec 12, 2009 | 2005 Nissan Sentra

2 Answers

Cooling Problem with '97 Subaru 2.5


sounds like one of 2 things, the thermostat or the engine has a leaking head gasket, replace the T-stat 1st, if the problem persists have the engine tested for blown head gasket(s) if the radiator was the problem u would have circulation and engine would overheat very slowly or just hotter than normal.

May 31, 2009 | 2003 Subaru Outback

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