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Heating & Cooling 3rd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 09-23-2013, 03:43 PM
coolair coolair is offline
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Default No heat

I've read a lot of post regarding this but none are quite exactly the same issue as mine and I am baffled.
I did live in TX and this wasn't a big issue as we had like a week of winter but have moved back to IA and need heat and defrost!
I have flushed the heater core several times and each time it seemed to be slightly plugged but after back-flushing it is flows good both directions but still no heat. To make sure the cooling system was clean I drained and flushed the engine, radiator and heater core - twice, replaced thermostat and rad cap put new Mopar approved coolant and went for a drive - first 5 miles I had decent heat and thought it was fixed, turned around to head back to the house and the heat went away again. Upon inspection - both heater hoses too hot to touch, upper radiator hose and upper radiator hot, recovery tank hot - bottom of radiator and lower radiator hose stone cold. I am totally lost - the engine temp shows normal, runs great.....any ideas???

2002 4.7 V8 auto 2wd
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Old 09-24-2013, 12:18 AM
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mb power wagon mb power wagon is offline
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did you take off the hoses and look inside to see if they are crumbling away? my truck did the same thing and that was causing my truck to do exactly what yours is. the inside of the hoses were slowly crumbling into dust and it was plugging my heater core. i changed all the hoses and flushed and back flushed the rad and heater core and the engine block several times. did you inspect the stuff that came out? was it kind of grainy and had the texture of sand?
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Old 09-24-2013, 10:48 AM
coolair coolair is offline
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I did inspect the coolant that came out and looked clean for the most part. I didn't inspect the hoses but you have a good point - they are all the original ones - I'm assuming you replaced all the heater hoses or did you replace the radiator hoses too? Thanks for the tip, will do a little more inspection.
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Old 10-02-2013, 03:03 AM
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i replaced all the hoses on mine. heater and rad. all of mine were doing it. it looked like a fine grain black sand with a slight sparkle to it. it kind of looks like mud till you get it on your fingers and rub them together you can tell the feel of it is deteriorating rubber. hope it helps ya.
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