Question about 2000 Daewoo Nubira

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Engine overheating I have changed the thermostat and flushed engine coolant, but the engine still gets hot. What else should I check? Thanks, Andrew I have the same problem. I have changed the water pump, thermostat in my 2000 Daewoo Nubira, yet the temperature is still high. It has not reached the red line for H but I want to know what could be the problem?

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  • lumierebleue May 20, 2009

    the mechanic says the fan is working. I even took the car to another place to have another diagnostic. They confirmed the fan is working but they told me the thermostat is the problem so I changed that but the temperature is still reading high. I will have to tell them to see if the water is moving. I think it is coolant that is there not water is that a problem or they can still check if the coolant is moving properly. Thanks



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Trapped pockets of air are a common problem. If the heater/defroster fan doesn't blow toasty warm when the engine is hot, you are probably low on coolant. or have to bleed the system more. It helps to park the car on a grade (front end high), turn the heater temperature control up all the way, and idle the engine with the radiator cap off. Then, fill the cooling system. Use distilled water - about fifty cents a gallon from the supermarket. And if you didn't change the radiator cap when doing you other stuff, go ahead and change it. If the old one is bad, it won't hold the proper pressure and the coolant can boil, causing it to over heat.

Posted on May 20, 2009

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Is the fans working? also check the water pump, by running car and open the radator cap to see if the water is moving.

Posted on May 20, 2009


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1 Answer

No heat in my 72 mark IV

The first item to check is the engine temperature. To help cold engines warm up fast, the flow of coolant is restricted by way of the thermostat-a thermal valve that opens when it's hot and closes when it's cold. When the thermostat wears out, it remains stuck open or shut, which leads to either overheating or cool operation. A worn-out thermostat might be preventing the coolant from getting warm enough to heat the cabin. Replacing the thermostat can be a 20-minute job or a real hassle. Check your service manual to see how involved the replacement is.

If the thermostat is fine, the flow of coolant in the heater core may be restricted by built-up goop. Sediment and grime can accumulate between coolant changes and collect in the heater core. A flush can be done by disconnecting the heater hoses at the water pump (when the car is cold) and using compressed air to push the coolant and gunk backward, out the inlet hose. Be sure to capture all the old coolant and dispose of it properly. Follow that with a few rounds of filling the core with tap water and flushing it out in the same way, then refill the core with mixed coolant and reattach the hoses. None of these fixes is hard, but the heater-core flush is messy, so you might want to take your car to a shop for service.

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I'm BAFFLED with a heater issue. Heat went off in my 1991 CRX SI with no apparent reason. Car is not overheating. Coolant in tank is full and it's clean. Top radiator hose is hot; bottom hose

Check the PUMP, there is apump that pumps the coolant from the radiator into the engine, if its broken you will have that problem.

Dec 29, 2012 | 1991 Honda CRX

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We just replaced the radiator and the thermastat but the needle still goes to hot

replace the temperature sending unit. Its right there by the thermostat. You can get this at any auto parts store. just need an open end wrench to change it. they do go bad(found out the hard way several years back). I hope this helps you

Jan 13, 2011 | 1999 Plymouth Voyager

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97 Mercury Sable, overheating but not on gauge, now won't stay running

Check the thermostat. The temperature sender is to the right of the thermostat and if the thermostat doesn't open the hot coolant from the block won't be flowing to the sender/gauge showing it is overheating. The thermostat is at the end of the top radiator hose where it enters the engine. Check the wires to the sender to make sure they are connected. Flush the coolant and heater core at the firewall connections as it may become clogged.

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My 1987 corvette coup motor gets hot real fast , I check therostat and thats not the problem , any idea what else it can be ?

Could be a faulty temperature sensor, at wost it's going to be a bad head gasket or intake manifold. Sorry for the bad news and hope that it's just a faulty temp sensor.

Thank you for using fixya and check your engine oil to make sure there is no coolant mixing in with your engine oil. Coolant is corrosive to your engine's internal bearings.

Sep 21, 2010 | 1987 Chevrolet Corvette

2 Answers

Temp gauge went past hot, pulled over car did not appear to be overheated, we have had a few days of very cold outside temps, but I recall this car's thermostat was removed completely and not replaced. Any...


If the car is overheating, especially in cool/cold weather you have a serious problem which needs to be addressed immediately. I very much doubt that the coolant temperature gauge is giving an incorrect reading and if you drive the vehicle with this problem you are risking expensive engine damage. In any event a mechanic can easily use another water temp gauge to check if the gauge in the car is giving a faulty reading.

If the thermostat has been removed - as you say - then there is nothing mechanical isolating/blocking the full flow of coolant between the radiator and engine despite the engine operating temperature.

Removing a thermo because of a previous overheating problem is not a sensible move because it does not address the underlying cooling problem issues. An old or faulty thermo should always be replaced with a new one and the causes of the overheating investigated and fixed. The fact that the thermo has been removed suggests that there was a cooling problem previously and it is likely that it was not due to a sticking thermostat.

Overheating can be caused by and one or more of the following:

1. Low coolant level. Check the coolant and top up. All coolant hoses (including heater hoses) need to be checked for deterioration and leakage. Suspect hoses need to be replaced .

2. A sticking thermostat which impedes the flow of coolant between the radiator and the engine when the engine warms up. A new thermostat needs to be fitted.

3. Debris in the coolant which is impeding coolant flow through the engine. Coolant needs to be changed every 2 years and the system flushed to avoid this problem and to address deterioration of the coolant mix.

4. Air locks in the cooling system from the inadequate bleeding of air from the system.

5. A faulty / corroded water pump. If the water pump has never been changed or you have no record of it being changed in the last few years then it needs to be removed, checked and replaced unless in good condition. A faulty water pump cannot push coolant through the system (or flow it fast enough) and your engine will definitely overheat.

A badly tuned engine can also cause an engine overheating problem in certain circumstances but in your case I suspect the issue is definitely with the cooling system as outlined above.

We cannot test and inspect your car so it is not possible to identify the exact cause of the problem in your case. I hope this helps and please get it checked out straight away by a reputable auto shop. Otherwise you are risking expensive engine damage and having to replace the vehicle entirely.


Dec 07, 2009 | 1994 Dodge Shadow

2 Answers


Ensure motor tune or other motor mechanical condition is not the cause of overheating, I assume the motor is actually running hot, - ensure the high gauge reading is not just a gauge sender problem. Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.

If none of the above fix your problem, replace the thermostat again - it is not unheard of for a new thermostat to be faulty .

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1 Answer

Engine overheating

good morning and welcome to fixya
how hot is the engine temp reading? you need to make sure that the water pump is actually pumping you should be able to see the coolant moving past the radiator cap if you remove it. is the vehicle losing coolant? you might want to take the vehicle in and have a block test done on it, this will check the hydro carbons to see if you possibly have a blown head gasket or a crack somewhere that there shouldn't be. please let me know so i can assist you further. thank you again

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Mar 25, 2009 | 2000 Daewoo Nubira

1 Answer

Heater not blowing hot but engine not overheating

The coolant thermostat needs replaced or you need a coolant flush. Heater cores (in the dashboard) often clog and stop warm coolant from circulating into the heater. A coolant flush would cure this. Flushes usually run from 70 to 90 dollars to have done at a service shop.

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3 Answers


did the electric fan on the radiator start up? if this dont start up, it can get the engine overheated , specily if the car run in hot weather , an when the car stay on idle . The other problem is the engine head , the head gasket can blow and you get the compresion presure in the water chanal .Try to se of the oil on engine is gray? If gray you must change head gasket.
Hoope this can help you

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