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upper hose hot, lower hose cold

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Old 01-29-2011, 12:26 AM   #1
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upper hose hot, lower hose cold

What causes this issue? Radiator and heater core are less than a year old.
Old 01-29-2011, 12:29 AM   #2
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Re: upper hose hot, lower hose cold

thermostat
Old 01-29-2011, 12:50 AM   #3
Sure why not.
 
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Re: upper hose hot, lower hose cold

If the truck isnt overheating, a properly working radiator? lol. If your talking about the heater core hoses your core is clogged.
Old 01-29-2011, 01:01 AM   #4
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Re: upper hose hot, lower hose cold

I am talking about the radiator hoses.

I can smell coolant so I bought the dye, and in the process of putting it in the radiator I noticed the top hose is hot, while the bottom hose is as cold as ambient temperature. I left it running for approx 30 minutes with same results.
Old 01-29-2011, 02:19 AM   #5
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Re: upper hose hot, lower hose cold

i agree with 1fast4by.
Old 01-29-2011, 09:49 AM   #6
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Re: upper hose hot, lower hose cold

Dont we all?
Old 01-29-2011, 09:17 PM   #7
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Re: upper hose hot, lower hose cold

bought a new one from oreilly's earlier and changed that puppy out and it still seems that the lower hose is cooler than what it should be.

On a side note I believe we have found the coolant "leak" which is a freeze plug but I'm not sure which one yet.
Old 01-29-2011, 10:26 PM   #8
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Re: upper hose hot, lower hose cold

it seems normal to me if the hot coolant leaves thermo into radiator and the air cools it off then starts the return back to water pump ,wouldn't that be how it was designed to operate.
Old 01-29-2011, 11:46 PM   #9
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Re: upper hose hot, lower hose cold

Quote: Originally Posted by 1fast4by
Dont we all?

No




like it was said the post above me, the hot coolant leaves the thermostat and cool coolant enters the water pump.
Old 01-29-2011, 11:58 PM   #10
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Re: upper hose hot, lower hose cold

Damnit Jon, yes you do!!!
Old 01-30-2011, 12:01 AM   #11
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Re: upper hose hot, lower hose cold

haha you were wrong *points finger*
Old 01-31-2011, 06:16 PM   #12
Sure why not.
 
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Re: upper hose hot, lower hose cold

Quote: Originally Posted by rhygin
If the truck isnt overheating, a properly working radiator?
Hmmm lol.

If your radiator is putting hot coolant back into the engine it is fail.

Thermostat opens hot stuff goes in the top runs down cooling passages turns into cold stuff, cold stuff goes back in through the bottom to get hot again. A vicious cycle.
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