Replacing Heater core and Evaporator Core

thaimex

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Hello Guys,

I just finished replacing the following parts on my brothers 2012 Ram 2500 SLT 5.7 Hemi:

Evaporator Core
Heater Core
Expansion Valve
Both Inlet and Outlet heater Hose
Thermostat
thermostat housing

To replace the heater core and the Evaporator core, the entire Dashboard has to be moved away from the wall of the truck. Most 4th Gen trucks from 2010-2018, 1500,2500,3500,4500 all use the same type of dashboard configuration. The AC Box(********* box) behind the dashboard also has to be removed. the heater core in my brothers truck was leaking inside the truck and was wetting the floor area of the passenger side. If you have to replace either the heater core or the evaporator core, you might as well replace both of these parts since they sit side by side of each other. That is the best solution u can do because if you only do one of them, chances are u might have to replace the other one later. No need to do double work since u are already getting into the black box. I replace the expansion valve which sits at the end of the evaporator core.

I did the same type of work for my 2010 Ram 1500 last year so doing the work for the 2500 was a piece of cake.
So now my brother 2012 Ram 2500 has AC and heater without any problems.
 

NOV87

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Sounds like a big undertaking.
 

Dodge 1500 4X4

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Do you work at a dealership, this is a major job, did you reclaim the Freon and evacuate the system, you have to be a rubber man from India to get in those spaces, I would love some pics of this undertaking.
 

thaimex

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no sir, i dont work at a dealership, but i have been working on cars since my high school days and im 48 yrs old. i took the truck to a mechanic shop so they can use a recovery machine to drain the refrigerant out of the ac system. Most of your electrical connections are on the passenger side foot area, and u have one electrical connection up in the handle on the pillar by the windshield, and u have another connection on the driver side, side panel of the dash, by the door.. Drop down ur steering column, disconnect 3 electrical connections under ur steering column, and u have 3 main bolts on each side of the dashboard. U have 2 small bolts up in the dash right under the windshield(by the defrost vent on top of ur dash). And u have 2 bolts at the bottom of the very of the front of the dash(center console area). If u have a center console, u have to remove the console in order to get to these 2 bolts. Once you have loosen the dash, u can lift it up slightly and pull it away from the wall and u should be able to see the ********* ac box. that box is being held but 3 nuts and 1 bolt and by the heater hoses and the ac lines(where the expansion valve is located at). Thats when the ac box comes out
 

thaimex

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RAMTRPR

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I did this on my 09’. Great time to clean everything and run any new wires if your doing audio or lights :)

I put a box out of a wrecked 2012 in mine. Came all as one piece and the donor truck only had 15k on her. Kept all my blend door motors as well and the blower too :) just in case.

Took my about 4 hours start to finish.

Thanks for the pics too :)


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Dodge 1500 4X4

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thaimex, Thanks for sharing, Yae it helped with your previous knowledge that helped you allot!!!
 

Ram71Cuda

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I did this on my 09’. Great time to clean everything and run any new wires if your doing audio or lights :)

I put a box out of a wrecked 2012 in mine. Came all as one piece and the donor truck only had 15k on her. Kept all my blend door motors as well and the blower too :) just in case.

Took my about 4 hours start to finish.

Thanks for the pics too :)


Sent from my iPhone using Tapatalk Pro
New to the site... Did I read that right? You put a box from a 2012 in your 2009. I have a 2005 that the recirc. door feel out of. But my reason for finding this sight is my 2013 quit blowing cold air. NAPA says the evap. core is leaking. I dropped the blower motor and looked with a mirror and the core looks a little dirty. They at napa said they seen dye was previously used somewhere by someone, I didn't see any on a valve or the evap. core. Not sure how they can access it as a bad evap. core without charging it and looking for a leak. 52 and twisted more than a few wrenches. Wife is fighting cancer or i would just tackle this myself. Just do not have the time. Any input would be appreciated. This 2013 has 92000 miles on it. Is this common for the evap. to go at this age. I mean its a clean truck and these are highway miles. thanx
 

thaimex

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they best way to find out if ur evap core is leaking is the smell inside ur truck and if u put refrigerant and within a day or two, its needs it again, then its ur evap core. Also u would have an odor inside ur truck. An odor like, kind of rubber or mildew odor inside ur truck. The 2012-2018 are the same except minor details. if ur heater core leaks, u would smell antifreeze inside ur truck. almost the same for the evap core, u would have an refrigerant odor inside ur truck. Throw some dye into the refrigerant and theres a drain plug on ur wall right behiind the engine where the water leaks out, if you see the dye come out of there, that means ur evap core is leaking. If you look at the very first of my pics, u see the heater core and the evap core. one side of the evap core is almost clean but the other side is really dirty. The bad thing to replace this is that u would have to do the same thing ive done to 2 trucks. Remove the dash and the black AC box to replace the evap core. If you are doing this, you might as well replace both the Evap core and heater core since they sit side by side each other. Replace the expansion valve also since u have to remove it to remove the evap core. Hope this helps you
 

NicksGarage

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I'm just starting this project on my 2009. The OEM procedures say to remove the seats and pull the carpet up to get to the floor ducts that go to the back. Did you have to do that? I don't have a console but the center seat has A/C vents in the back of it and there are floor ducts under each front seat.

Also was it easier to remove the heater hoses from inside or from under the hood. I can't see how I'm going to get to the clamps from under the hood.
 
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