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heater hose connection

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Old 07-05-2013, 04:21 PM
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heater hose connection

I have a 351m and need too now which hose connects pump to the heater core and the hose to the block to the heater core and i am kinda getting tired of the trucks heater problems
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Old 07-05-2013, 05:54 PM
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I have never worried about how they hooked up, it really doesn't matter as far as I know. These trucks do not have water valves, the water just flows through the core all the time.
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Old 07-05-2013, 09:43 PM
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Dave is right - it doesn't matter which way it flows. But, what heater problems are you having?
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Old 07-06-2013, 12:16 AM
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being as it's summer months, i know several people who, to temporarily solve heater issues, will loop the system, making it so no coolant goes through the heater core. but, to allow us to help you better, what issues are you having, exactly?
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Old 07-06-2013, 12:31 AM
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Replaced second heater core and still leaking
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Old 07-06-2013, 02:39 AM
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sounds like its time to buy a different brand of heater core

as for hose connections, if one is above the other its best to have the hose from the top port to the water pump, and the one from the bottom port to the head. otherwise there's a chance of an air pocket getting stuck in there - but i don't remember, maybe they're side by side, in which case it doesn't matter at all.
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Old 07-06-2013, 08:03 AM
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There's been quite a bit of discussion on here about heater cores, but most of it has been regarding them fitting rather than leaking. If you are getting new ones that leak I would find a new source. But, there aren't very many different sources in reality.
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Old 07-06-2013, 08:17 AM
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The heater cores are very thin and can't take much abuse from taking the hoses on and off. If you ever need to replace the hoses on a old but good heater core, always take a knife and cut them off the heater core barbs, never twist them off. It will leak every time if you twist them off, been there done that.
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Old 07-06-2013, 11:00 PM
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Thats exactly what i did is there one for an ac truck that you guys would recommend i really don't want to pay a mechanic 460 dollars just to do it
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Old 07-06-2013, 11:16 PM
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Is it factory or dealer air?
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Old 07-06-2013, 11:21 PM
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Its factory
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Old 07-06-2013, 11:35 PM
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Factory is the easiest. I got mine from Archion, also known in real life as Matt Vose. PM him and he can fix you up. But this thread has info specific to your truck, as mine is an 81 Ranger with factory air as well.
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Old 07-07-2013, 04:58 AM
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Unfortunately Gary I no longer work for that company, or sell auto parts for that matter...

And if your mechanic is quoting you 460 bucks to do that factory a/c heater core, he is a crook and needs to close shop.
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Old 07-07-2013, 08:10 AM
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Matt - I hope the new job has an easier commute and better pay.
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