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Old 12-18-2011, 09:52 PM
DadzDodge DadzDodge is offline
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Join Date: Aug 2011
Location: Kentucky
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Vehicle: 1996 Dodge Ram
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hubble - there's a chance you have air in the cooling hoses, which would cause the problems you've described. I just changed the heater core and heater hoses in our '96 and to get the air out I would leave the radiator cap loose, start the engine and let it run until the thermostat is open, and then squeeze the bottom hose (being sure to stay clear of the fan). I then tighten the cap and squeeze the hose again.

With the engine fully warmed up and running, have you squeezed the two hoses going to and from the heater core? They should both be very hot, and be at about the same temperature.
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