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Old 12-08-2010, 07:36 AM   #1
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Default truck overheating 04 ram 1500

I am looking for any thoughts on my dodge overheating. It started yesterday when idiling I tried to turn on heater, only cold air came out. I noticed that my temp gauge was halfway between normal and max/ overheat level. I shut the truck off at this point. A bit later I cranked it up temp was normal and heat started blowing. Later in day while waiting at bank drive thru the temp started rising. As I drove away I turned heat on and it immediately pulled the temp back down to normal. THe temp does not seem to rise past that 3/4 mark on gauge whichich is 25% higher thatn norm. The heat not working that morning really puzzles me. It worked fine the rest of day. 115 k miles on truck, had it since new with no problems ever.

Thanks in advance, any input would be greatly appreciated.
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Old 12-08-2010, 08:31 AM   #2
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Most likely low fluid in the radiator or a sticky thermostat. When your heater doesn't blow warm/hot means no water getting to the heater core.
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Old 12-08-2010, 08:55 AM   #3
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I will be checking fluid shortly. Then thermostat. Thank you
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Old 12-08-2010, 10:53 AM   #4
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No heat with the engine warm, radiator full and the heat switch on is a sure sign that the termostat is bad as mentioned earlier. When it sticks shut it can block circulation of the coolant through the heater core.......... Good luck..... T
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Old 12-15-2010, 08:07 AM   #5
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Was about a half gallon low. Replaced it now its ok. I think the tstat must have stuck for a bit when it was super cold. Truck has been fine for over a week. Thanks for the input.
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Old 12-15-2010, 09:49 AM   #6
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Considering the price of a new engine, I would have the thermostat replaced and the system and radiator cap pressure tested.
That half gallon of missing coolant went somewhere,...... for some reason.
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Old 12-15-2010, 12:33 PM   #7
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Quote:
Originally Posted by Emerald Ghost View Post
Considering the price of a new engine, I would have the thermostat replaced and the system and radiator cap pressure tested.
That half gallon of missing coolant went somewhere,...... for some reason.
Aaahhhh, I think we are on the same page, out the exhaust past a head gasket...... I hope that’s not it.... Like he said change out that thermostat and hope it doesn't happen again..........
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Old 12-15-2010, 12:49 PM   #8
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not much of a mechanic, but if it went past the head gasket, that would turn the engine oil into a chocolate milkshake looking color wouldn't it ? Should show up on the dipstick ?
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Old 12-15-2010, 02:14 PM   #9
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You would think so, but I have seen cases where the water never got into the oil because of the location and condition of the seepage... Great point though…….
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Old 12-15-2010, 02:28 PM   #10
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Quote:
Originally Posted by Boatjob1 View Post
You would think so, but I have seen cases where the water never got into the oil because of the location and condition of the seepage... Great point though…….
Yep, the coolant and/or the oil will look kind of like chocolate milk if they're mixing in one of the systems.

If it's getting into the exhaust, depending on the severity of the head gasket leak (or because of a cracked head), you might notice white steam coming from the tail pipe.
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