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SUVs Kia Sportage Kia Sportage Maintenance and Repair
610 messages, Last post on Dec 01, 2009 at 5:16 PM
You are in the Kia Sportage Forum. Your Hosts are steve_ & tidester
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Hi Here is what happened: Last week I drove my vehicle about 50 miles or so, when I parked my car I found a leak in the upper radiator hose. It was spraying out forcefully and steaming from under the hood. I placed a new hose and there was no problem until yesterday. I made another 50 mile trip and this time my vehicle showed overheating. When I parked it water was spilling out again. It was nightime and was unable to see where it was coming from. I thought maybe my hose hadnt been clamped tight enough so I tightened it. The next day I put more antifreeze in it and drove around the block a couple times. It stated showing signs of overheating again and I parked it and saw more fluid coming out. When I turn on the heater the temperture drops pretty quickly. I thought maybe the water pump so I checked by attempting to move the fan with my hand or see if it made any sounds. The fan is secure and moves with the force of my hand but no more. So it seems there is pressure in the water pump. Could it be just the thermostat? |
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Replying to: Jokeryona (Feb 19, 2009 9:36 pm) That was my first thought. You can examine it for obvious flaws or replace it cheaply and, with a little luck, fix the problem without looking for the more expensive possibilities. tidester, host SUVs and Smart Shopper
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Replying to: tidester (Feb 19, 2009 11:52 pm)
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Replying to: Jokeryona (Feb 19, 2009 9:36 pm) Possibilities: Thermostat: yes: impairs circulation through main radiator, but not through heater core. Water pump: improbable, since water is obviously circulating through the heater core as you have proven; it could not without the pump working. Fan clutch: improbably as you have resistance when turning by hand...anyway, check that is rotates forcefully as the engine gets hotter; there have been cases of fan clutches being shot...but I do not know the temperature where you live; it has an impact on diagnosis. Last: blown head gasket....but usually it impairs pump operation (exhaust/air enters the cooling circuit) and you would have very poor heating from the heater....but "when you turn the heater, the temperature drops pretty quickly"...which temperature? That of the engine of that of the air coming out of the heater...?
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Replying to: Jokeryona (Feb 20, 2009 8:41 am) I thought that is what you said it did in your original posting? ("It was spraying out forcefully and steaming from under the hood.") In any case, the thermostat should be an easy thing to check out. tidester, host SUVs and Smart Shopper |
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Replying to: lmp4 (Feb 20, 2009 10:49 am) The fan is in good shape, it runs fine and turns noramally as always. I think the crack i orgionally had in my upper radiator hose may have been caused by the thermostat not opening and forcing the older hose to crack causing my initial break. Does that help, with your assessment?
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Replying to: Jokeryona (Feb 20, 2009 7:28 pm) ... I do not like the above quote.... but before gearing for the worst, try simple things first...change the thermostat to make things clear....in fact, you can run a test by simply removing the thermostat and run without it ..but if all trouble proove cleared out at that time, you'll have to go again and install a new one, so you might choose to install a new one right away. Report findings. By the way, even with the radiator cap opened ( then no pressure build up), the water would circulate, temperature would rise and thermostat would open on temperature, not pressure.
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Replying to: lmp4 (Feb 20, 2009 9:36 pm)
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Replying to: Jokeryona (Feb 20, 2009 10:14 pm) should read "...my engine overheats causing the fluid to come out ....the fluid didnt spill out until it overheats " ...cause and effect  Now lets see what happens with a new thermostat...but before that, notice you can test your thermostat on your electric range in boiling water using a candy thermometer...thermostat should open around 195...if it does...then there is another cause...
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Replying to: lmp4 (Feb 21, 2009 2:24 pm) So I put on a new thermostat.(had some trouble with the housing due to steel screws in aluminum holes) but once everything was sorted out and new thermostat was in I have been driving and on three seperate occasions nothing has happened. I pray that was it. It was about 9 years old and gone through a couple flush kits with heavy rust, so I think it was time for it to go. But thanks for the help. 
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