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Circulating pump gets hot and will not pump water

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Check impellers [ off and power off ] for debris or damage--listen for bearing noise or labor running --test amp draw if high possible bearing dry or damaged ---most pumps also are thermal protected will shut down when hot

Posted on Apr 29, 2017

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Posted on Jan 02, 2017

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I have a 2002 kia rio cinco changed radiator and fan assembly. Thermostat is out but it still heats up on me! Whats the problem?


Sounds like the water pump if you have had all that done. Remover the filler cap on the engine that says "DO NOT OPEN WHEN HOT" please dont open it when hot. check that it is full and you don't have an airlock (it will fill your header bottle as well if you go right to the top. Start the engine and you should see the water circulating top up if it goes down. If when the engine is running, the water gets blown out with force then I would be looking at cylinder head or gasket problem. If after topping up in the engine water point, and you can see water circulating, top it right up and replace the cap. providing you have no leaks this should have cured the overheating. No circulation means, change the water pump. Hope that helps.

Mar 13, 2015 | 2002 Kia Rio

1 Answer

How do I know if my water pump is bad. My 1998 Buick regal will not keep water in radiator. I thought it was the heater core but my floors do not get wet so now I'm not sure if its the heater core?


There are a number of possibilities. Does the car overheat? It can be a blown head gasket. To check this, open the radiator cap (not the plastic filler bottle, I mean the metal cap on the radiator itself).
Put your nose close to the opening and smell the water. If it smells of exhaust gas, you have a blown head gasket.
Another check is to pull out the dipstick and have a look at the colour of the oil in the sump. If it has a grey colour, you have a blown head gasket.
The first place to look however is check on the floor after you've driven the car for a while, and see if you can see water dripping to the floor, or if you open the hood immediately after a longish drive, check for steam which could indicate a bad head gasket that did not blow into the water chamber per se.
Steam from a hot engine will also indicate leaking radiator hoses or a leaking water pump.
If you suspect the water pump, again, open the metal radiator cap and fill the radiator to the top. Let the engine idle until it is hot, then rev it a bit. If the water pump is working, you will see the water inside the radiator circulating. Just make sure the engine is hot, else the thermostat will prevent the water from circulating.
An extra bit of information, if you can see the water circulating and also notice bubbles in the water, it is an indication of a leaking head gasket.

Oct 08, 2014 | Cars & Trucks

1 Answer

Car is not over heating but the water isn't circulating and heater doesn't get hot if i am not moving


You need to bleed the air out of the cooling system. Google a search of the way to do this.

Mar 20, 2014 | 2004 Oldsmobile Alero

1 Answer

Heater hose hot one side cold on other


If it is hot on the engine side and cold on the radiator side then most probable the water pump is nonfunctional. The water is not circulating and hence remains hot on the engine end and cold on the radiator end. The water pump needs immediate attention as the engine may get harmed if not rectified.

Jan 02, 2011 | Ford F-150 Cars & Trucks

1 Answer

I put on new water pump.Motor still gets red hot.could it be rad.


You need to make sure the coolant is circulating. Check to make sure the top and bottom hoses are hot and firm to the touch. If the bottom hose is not hot and firm the water isn't circulating which means the thermostat is stuck in the closed position. Also check to make sure the radiator isn't clogged or doesn't have to many crushed fins that prevents the air from properly cooling it.

Aug 24, 2010 | 2001 Pontiac Montana

1 Answer

Overheating: 1999 bmw 323i m series 2.5 ..Installed: new water pump , thermostat. radiator,new Water Reservoir, cap.. hose on top side hot , lower hose cold even when engine is hot..no water circulating at...


the water pump and thermostat should have solved it. an air pocket can cause that but usually not to that degree.

don't get one of those cheap *** plastic impeller water pump for sissies. Get the metal impeller one. get a cool running thermostat and drill two 3/16" holes in it 180 degreess from each other. you may have installed the t-stat backwards.

Jun 03, 2010 | 1999 BMW 323 Series

1 Answer

My car run good but when it get hot it shuts off an i got to wait for the car to cool before cranking it up again what could that be


First, you've got to find out why it's getting HOT. Is the water/coolant leaking somewhere and why? Is it the thermostat or water pump leaking that makes it get HOT? Is the water circulating in the radiator? That's what we must know. Good Luck !!!!

Sep 09, 2009 | 1995 Pontiac Bonneville

2 Answers

The fan works and i changed the sensor


you need to first check that the water is circulating if not could be a water pump or thermostat problem also check for signs of oil in the water this could indicate a head gasket problem if your unsure this can be checked out using a special fluid

Aug 06, 2009 | 1987 Honda Accord

1 Answer

Water pump not pumping water through engine


it sounds like there is a blockage in the system look for very stiff coolant lines or it coulc be the heater core in the cab or on the fire wall. is the engine getting up to temp ? or is it just not getting hot in the cab?

Feb 13, 2009 | 2000 Jaguar S-Type

2 Answers

Daughters 1996 ford contour 4 cyl. died on the road.After sitting a while it started again then drove it home.It starts and runs good but after warm up it bubbles out the expansion tank, I replaced the cap...


dear sir,

the solution to your problem is simple. yes you say that it has a new water pump, but the reason that a vehicle bubbles out of the expansion tank is because the water pump is not circulating coolant, the coolant boils in the engine and bubbles out of the expansion tank. secondly the reason the fan never kicks in is because the temp sensor is not seeing the heated coolant because the water pump is not circulating the coolant through the cooling system. 3rd. the heater never gets hot because the water pump is not circulating coolant through the heater core in order for it to get hot and provide heat. and the temperature gauge never seems to go up because yup you guessed it, the water pump isnt circulating coolant in order for the engine temperature sensor to see hot coolant and thus send a signal to the engine temperature gauge as to the coolant temperature. i know you said it has a new water pump, but i have heard that this type of vehicle may come with a plastic fin pump. i would remove the pump and check the passages for foreign matter{ trash} in the passages as well as the condition of the new pump. also one last thing, the reason the vehicle died on the road in the first place was probably because it overheated. happy hunting and please post to see what you found. i am a mechanic by proffession.

Dec 17, 2008 | 1996 Ford Contour

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