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Noise from heater core?

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Old Mar 20, 2005 | 10:22 PM
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motorhead_83
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From: Houghton, MI
Noise from heater core?
I hear a "water moving sound" when I rev the engine in a 1994 f-150. Heat still works fine, but what do you think it might be?

Thanks

Dan
 
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Old Mar 20, 2005 | 10:42 PM
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Might be the water pump?
 
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Old Mar 20, 2005 | 10:45 PM
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Its not the water pump, at least not making the noise. It is definitly coming from the pass. side dash, the heater core.
 
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Old Mar 20, 2005 | 10:47 PM
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hmm...a water moving sound...could be the sound of the coolant moving threw the heater core.
 
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Old Mar 21, 2005 | 07:02 AM
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you have a leak somewhere and that is the air in the system you hear.
 
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Old Mar 21, 2005 | 02:59 PM
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Check to ensure your radiator is completely full of coolant.
 
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