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Runs water to over flow tank and low coolant light come on

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For the water to flow to the reservoir and the low water light comes on then I suggest a compression test to check for head gasket/ cracked head. Next have a coolant system pressure test done to check for leaks . It is ok for the radiator cap to allow a small amount of hot water into the reservoir but when it cools down the water should be drawn back into the radiator. The first check is to test the radiator cap for correct operation. Then do the rest.

Posted on Aug 01, 2013

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Posted on Jan 02, 2017

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3 Answers

I change the thermostat and radiator and the car still runs hot when idled


Check and see if the cooling fans are coming on. Check fuses and relays for them.

Jul 22, 2016 | 2003 Kia Sorento

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Temp goes up when i drive it on a bit. pressue in the coolant system and need to top up once a week


i have the same problem. stop light comes on in the dash. water is low in the tank and when i open it it rushes back into it and also flows out the valve at the back. i put a themostat into it today and still same problem. so just wondering is it water cooler sensor or could it be water pump.

Dec 21, 2012 | 2002 Volkswagen Passat

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2000 vw beetle 2.0 L, low level coolant light...engine mil code 1256


not the pump but air in the system or a broken wire to the coolant level sensor
that sensor at the top of the radiator tank has to be completely immersed in coolant or the circuit is broken and the light comes on
same effect id the wire to that sensor is broken in the insulation

Jun 16, 2017 | Cars & Trucks

1 Answer

I have 2001 alero. Yesterday the coolant light came on and the engine just died. Any ideas maybe fuel pump or timing belt or could it be the water pump


IF LOW COOLANT LIGHT CAME ON ENGINE SHUT OFF BECAUSE IT GOT TOO HOT AND OVER HEATED.WHEN YOU HAVE LOW COOLANT.YOU COULD HAVE LEAKING RADIATOR.YOU COULD HAVE LEAKING RADIATOR HOSES AND WATER PUMP. ADD MORE COOLANT IN CAR RADIATOR UNTIL YOU AT FULL COLD MARK ON THE OVER FLOW COOLANT TANK START THE CAR LET IDLE UNTIL ENGINE GET OPERATING TEMPERATURE.RAISE YOUR HOOD LOOK FOR LEAKS THE RADIATOR PRESSURE WILL PUSH COOLANT OUT WHERE LEAKS COULD BE.LOOK AROUND RADIATOR AND COOLANT HOSES.LOOK AT WATER PUMP.IF YOU SEE COOLANT LEAKING AT WATER PUMP REPLACE IT.

Feb 26, 2011 | 2000 Oldsmobile Alero

1 Answer

My service engine soon light came on yesterday and minutes before that my low coolant light came on & when the service engine light came on it felt like it was misfiring for a moment but it runs fine...


First, add coolant to your reservoir and radiator if needed. (Should turn "Low Coolant" light off) Second, go to Advanced Auto, ask for a OBD II meter to clear the "Service Engine Soon" light (Their free to use). Third, might have water in your gas tank. Get some "HEET" and put it in your gas tank. Until the water is gone, you might have to clear the light more than once.

Aug 14, 2010 | 1998 Chevrolet Lumina

1 Answer

Changed expansion tank but light still on any ideas 03 ford escape low coolant level light on dash stays lightup


bad low coolant switch or still low on coolant.

Engine Cooling The cooling system components are the:
  • engine coolant temperature sensor (ECT sensor) (12A648)
  • radiator (8005)
  • degas bottle (8A080)
  • radiator draincock (8115)
  • water pump (8501)
  • water temperature indicator sender unit (10884)
  • water thermostat (8575)
  • dual speed fan motor assembly
The water pump circulates the coolant.
The water thermostat:
  • controls the engine coolant temperature.
  • allows quicker engine warm-up.
The degas bottle:
  • provides a location for fill.
  • contains coolant expansion and system pressurization.
  • provides air separation during operation.
  • replenishes the engine coolant to the system.
The fan motor (8C607):
  • operates only when the ignition switch is in the RUN position.
  • will not operate with the switch in the OFF position.
The engine coolant flows:
  • from the lower radiator hose (8286) to the water pump.
  • from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump; an open water thermostat allows the engine coolant to flow to the radiator.
Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle.
When adding engine coolant, use a 50/50 mixture of clean, drinkable water and engine coolant.
To maintain the integrity of the coolant and the cooling system:

Dec 07, 2009 | 2001 Ford Escape

1 Answer

Have a water sounding noise coming from the dash when accelerating


It sounds like you have air in your cooling system, Check your coolant level and add if your low. Fill the radiator if your low on coolant and the over flow tank with GM Dex cool with 50/50 mix of water. open the radiator cap to the first click to allow the air to work it's way through out the system and out through the radiator cap and in to the over flow. Once the engine cools down, the coolant in the over flow tank will flow into the radiator, so keep an eye on the over flow tank and refill to the full mark as needed. If you have not flushed out the coolant system, you may want to. The GM Dex cool has a life expectancy of 5 years or 150.000 miles, and should be replaced. The capacity of your cooling system is 11.5 liters, good luck.

Nov 16, 2009 | 2001 Chevrolet Blazer

3 Answers

Wter coolant runs hot over 260


If you have checked all of your coolant levels, and don't see any leaks - then more than likely your thermostat is bad. The part isn't any more than $10 -$15 dollars and can be replaced in less than an hour.

Hope this helps!

-KC GTO Dad

Sep 18, 2009 | 1998 Cadillac DeVille

1 Answer

Low Coolant light flashing on 1996 Buick Regal 3.8


The low coolant sensor should be located in the passenger side radiator tank, You need to take it out and clean the sludge off of it for it to work right. Or you can just unplug it and forget about it, the light will go out and it won't cause any problems.

Mar 01, 2009 | 1991 Buick Regal

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