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Old 03-06-2011, 06:53 PM
99RamCR 99RamCR is offline
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Default Little heat please help

Hey guys, have an issue I've been fighting with on my truck. I have a little heat, but it's not much. I have replaced the thermostat and it's opening right on que I think it's a 180 degree one can't remember to be honest. Truck runs right in the 190-200 degree range all the time so no issues there. I've also replaced the water pump recently since it decided to crap out on me.

I've checked the hoses on both sides of the heater core and they are both hot to the touch. I've also checked the motor for the blend door under the dash and it seems to be functioning normally. It has the electric one and when I twist the knob to go from hot to cold, it turns quite a ways and then stops, then I twist the knob again back to hot and it turns the opposite direction about the same so don't see any problems there. There are no leaks externally on the engine both me and my mechanic have verified that but I am loosing coolant somewhere. My mechanic also looked down into the intake and nothings leaking there around the notorious plenium gasket problem. He said mine actually looked pretty clean. Any other ideas short of backflushing the heater core which I'm not convinced is the problem since I have hot hoses on both sides of the heater core? Thanks.
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Old 03-06-2011, 07:43 PM
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The core could be sufficiently clogged to prevent you from getting heat into the cab while allowing enough through to heat the outlet hose. Backflushing may help but it's no guarantee. The only other possibility is a broken blend door.
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Old 03-06-2011, 07:55 PM
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You might have an air lock in the heater. Whenever I change coolant or otherwise work on the cooling system after refilling I always remove the heater outlet until I see good flow coming out (with the engine running of course). See http://wiki.answers.com/Q/How_to_ble...he_heater_core
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Old 03-06-2011, 08:06 PM
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When I bought my truck it had a problem with the heater not getting very hot. I told the dealer about it and they backflushed the truck before I bought it. Fixed the problem and I haven't had an issue with it since.

It probably would be worth doing before you starting trying to tear stuff apart.
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Old 03-06-2011, 08:30 PM
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Ok I'm going to start with backflushing the heater core and see if that helps. As far as a broken blend door, I'm assuming the only way to check that would be to take the whole heater box out which would basically be the same to replace the heater core right? Or can you check that without tearing it apart? If I have to is there an easy how to guide preferably with pics on how to take the dash apart to do the heater core? Also is there any "safe" chemicals I can pour into the heater core to help eat up whatever is in there? Thanks for the help.
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Old 03-07-2011, 10:22 AM
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well iv taken the heater core out on mine i can tell you its not that bad and you dont have to listen to a mechanic when it comes to it just gota find the screws and have pacients ill try and post pics if i figure it out lol
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Old 03-07-2011, 03:34 PM
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there are some good youtube videos, most dodge heater units are close to the same & they tell you how to trouble shoot & repair
http://www.heatertreater.net/index.htm
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Old 03-07-2011, 03:37 PM
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Quote:
Originally Posted by moparman360 View Post
well iv taken the heater core out on mine i can tell you its not that bad and you dont have to listen to a mechanic when it comes to it just gota find the screws and have pacients ill try and post pics if i figure it out lol
Yeah, who needs the advice of a mechanic, anyway?
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Old 03-07-2011, 03:59 PM
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the only reason that i mentioned heatertreater, is because they asked

'If I have to is there an easy how to guide preferably with pics on how to take the dash apart to do the heater core? '

that website shows how to do step by step fixes & when the site comes up, other contributors also have vids for back flushing & everything else

http://www.google.com/#hl=en&sugexp=...5bfc51b1f0a5d6
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Old 03-10-2011, 03:34 PM
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Default

we have the same problem with our heater. the hoses are hot but the heater inside isn't. we've flushed the core...twice...and it works for a little while. we also smell antifreeze while the heater is going. the parts store we shop at as well as a few people my husband knows said it was the heater core. we bought a used one from Spaldings out of Spokane, WA (you can order things and have it shipped to you as well). they pressure tested it and it was a good core, so we will see when we get the thing installed.

as for the tearing your dash out...nope...this is our second dodge with a heater core issue and you have to tear the dash out to get to it. just be patient and don't lose the screws! LOL
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