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a/c evaporator replacement

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  #1  
Old 07-09-2007, 12:28 AM
davmelrach davmelrach is offline
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Default a/c evaporator replacement

Hey guys,

I just replaced the a/c evaporator in my '98 1500. I can post detailed instructions that anyone can use to complete the job. I borrowed some a/c gauges and a vaccuum pump, otherwise I just used a few basic tools. It took about 3 hours to remove the box and about 1 1/2 hours to replace it and 1 hour to charge the system with 2 cans of 134a. I would do it again in a minute and you will save hundreds on labor!
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  #2  
Old 07-09-2007, 07:24 AM
wildwolf59 wildwolf59 is offline
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Default RE: a/c evaporator replacement

can u give details on changing theac coil out???
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  #3  
Old 07-09-2007, 12:22 PM
davmelrach davmelrach is offline
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Default RE: a/c evaporator replacement

Wildwolf,

I am not really familiar with an A/C coil. If you are talking about the condenser, that change is fairly easy but you may be talking about something I am not familiar with.
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  #4  
Old 07-09-2007, 08:59 PM
davmelrach davmelrach is offline
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Default RE: a/c evaporator replacement

Ok here is how to replace your a/c evaporator and/or heater core.

1) Disconnect battery cable
2) Remove first screw on door sill both sides ( these are the pieces that hold your carpet down)
3) Remove kick panels and panel under steering wheel.
4) Remove two nuts holding up steering wheel.
5) Remove five screws where dash meets the windsheild.
6) Remove 2 bolts on the left and right side of the dash up against the side of truck (under kick panels)
7)Dashboard can now be pulled free toward seat.
8)On passenger side of dash tie rope or wire to flange where bolt went into side of truck and lift dash up
to expose fan box. Secure rope to handle on side of A-post
9) Remove vaccuum lines and unclip electrical connections. (Hint: temperature control cable has to be
removed with pliers by pulling straight up, removing the entire clip.)
10) Now the secret: there are two screws holding the box to the firewall on the inside (one has ground
wire attached.) The other is in the upper right hand corner facing up.
11)There are four nuts holding it from the engine side of the firewall (one nut is accessed by removing the
electircal panel on passenger side.) Remove all four nuts.
12)Remove heater hoses by removing clamps. Mine were stuck so I just cut the hoses and got new ones.
13)Release A/C freon from LP side with gages and disconnect A/C lines from firewall exit. ( This
requires a simple 5 dollar tool that disconnects fueland A/C connections.
14) The heater box will now come free!
15) There are several screws holding heater box together. It will come apart in two halves. Go ahead
and replace your heater core because you dont want to do this again in a month!
16) You may want to replace your accumulator as well (its fairly cheap)
17) Reassemble /reinstall box. Draw vaccuum on A/C system for 30 mins. recharge with 134a.

YOUR DONE AND YOU SAVED HUNDREDS!
















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  #5  
Old 07-10-2007, 12:19 AM
jisthangin01 jisthangin01 is offline
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Default RE: a/c evaporator replacement

Hey is this the same in a 99? I gotta do an evaporator in my truck as well. I've been using my pop's cuz the a/c is nice haha.
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Old 07-10-2007, 10:27 AM
91wrangler 91wrangler is offline
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Default RE: a/c evaporator replacement

Yeah its the same, I just did mine the other day. Getting the heater hoses off was probably the worst part of the job.
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Old 07-10-2007, 11:53 AM
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Default RE: a/c evaporator replacement

Did you happen to take any pics of this job? I'd REALLY like to see them if you did.
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Old 07-10-2007, 03:35 PM
davmelrach davmelrach is offline
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Default RE: a/c evaporator replacement

I do not have any pics but trust me you wont need 'em. This was a first time evap replacement for me and it went great. The comment about the heater hoses is right on too.... Mine were a b@&$ to get off and I had to end up just cutting them. It was well worth it just to getsome new hoses instead of fighting with them, wasting time. As far as I know this job will be the same for 95-01 Rams. Again, just print the instructions.... I made sure they were accurate.
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Old 07-10-2007, 04:55 PM
plott hound plott hound is offline
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Default RE: a/c evaporator replacement

i just changed mine in my 1996 ram along with the heater core and blower motor.the worst part of the job is removing the dash.working on the actual hvac unit is a breeze.
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  #10  
Old 07-10-2007, 06:34 PM
Trashlord Trashlord is offline
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Default RE: a/c evaporator replacement

My evaporator is being replaced at this moment...I just bought the truck on 6/29 from a used car dealer and the a/c wasn't working. they told me they charged it and it was all good to go (their big mistake) 3 days later when it was out of freon they had to repair it. The owner of the place called me today and sounded really depressed when he told me I was right that it was the evap. LMAO his mechanic was taking the dash apart as we spoke. best part is all the $$$$ is on them (for once I got lucky) I was going to have him replace my heater core while he was in there but at the last minute I changed my mind (just had a bad feeling about him doing it), if and when it goes I will do it myself
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  #11  
Old 08-26-2007, 06:15 PM
miknwv miknwv is offline
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Default RE: a/c evaporator replacement

I got a 99 diesel....when i got it, the AC would work for about 15 mins at a time, then just stop. i'd turn it off, wait about5 mins, turn it back on and it would work. when i turned heat on i could smell that hte heater core was goin bad. now i got antifreeze leakin into the passenger floorboard. question is, when i replace the heater core, is there anything else i need to replace that could have been causing the AC to act like that?
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  #12  
Old 10-09-2007, 09:47 AM
Koldkut Koldkut is offline
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Default RE: a/c evaporator replacement

I followed these instructions yesterday and I found only one step missing and I took some pics. I however forgot to get a pic of the unit out of the truck. Some pics aren't here, if you need pictures for the steps that don't have them, you should be taking this to the mechanic.....I forgot to circle things in the pics, I will throw down with some MSPAINT soon to have the parts stand out.

1) Disconnect battery cable

2) Remove first screw on door sill both sides ( these are the pieces that hold your carpet down)

3) Remove kick panels and panel under steering wheel.

4) Remove two nuts holding up steering wheel.

5) Remove five screws where dash meets the windsheild.

6) Remove 2 bolts on the left and right side of the dash up against the side of truck (under kick panels)

7)Dashboard can now be pulled free toward seat.

8)On passenger side of dash tie rope or wire to flange where bolt went into side of truck and lift dash up
to expose fan box. Secure rope to handle on side of A-post


9) Remove vaccuum lines and unclip electrical connections. (Hint: temperature control cable has to be
removed with pliers by pulling straight up, removing the entire clip.)

10) Now the secret: there are two screws holding the box to the firewall on the inside (one has ground
wire attached.) The other is in the upper right hand corner facing up.


11)There are four nuts holding it from the engine side of the firewall (one nut is accessed by removing the
electircal panel on passenger side.) Remove all four nuts.

12)Remove heater hoses by removing clamps. Mine were stuck so I just cut the hoses and got new ones.

13)Release A/C freon from LP side with gages and disconnect A/C lines from firewall exit. ( This
requires a simple 5 dollar tool that disconnects fueland A/C connections.

14) The heater box will now come free!

15) There are several screws holding heater box together. It will come apart in two halves. Go ahead
and replace your heater core because you dont want to do this again in a month!

16) You may want to replace your accumulator as well (its fairly cheap)

17) Reassemble /reinstall box. Draw vaccuum on A/C system for 30 mins. recharge with 134a.


***All pictures are located here: http://heandshe.org/koldkut/Dodgeforum/HeaterCore/
My brothers webspace addressing has changed and the old pictures were not showing up. They are not in numerical order,Giv me a few days to get the files renamed in order so that they may be put with the direction numbers. Thanks.***
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  #13  
Old 10-28-2007, 10:29 AM
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Default RE: a/c evaporator replacement

I wish I had search for this yesterday.[:@] Oh well, the aluminum replacement heater core from O'Reilly is crap. I don't trust it as the inlet/outlet pipes rotate. I'm getting a copper/brass replacement from Rock Auto. I bookmarked this. Thanks to Koldcut for the pics. The 97 is slightly different (no handle on the A pillar), but that's about all.
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Old 11-02-2007, 01:52 PM
rocksgreen97 rocksgreen97 is offline
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Default RE: a/c evaporator replacement

man you guys are awesome for throwin this post up here thanks for the details i was sweatin this crap.......but i do have one question, seeing that I am simply just replacing the heater core and not the A/C evap, do I HAVE to discharge the a/c? or is there some way to remove the heater core by itself w/o pulling the whole thing out? maybe cutting the box or something then JB'ing back together? cause im scared to mess with the A/C system and my local shop wants $150 freakin dollars just to discharge my system for me ><, thanks again guys
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Old 11-02-2007, 01:54 PM
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Default RE: a/c evaporator replacement

I removed the two large clips on the accumulator and managed to pull the box back far enough inside the cab to remove the heater core. I STRONGLY recommend you have an assistant when you do that and especially when you re-insert the heater core.
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Old 11-02-2007, 04:11 PM
rocksgreen97 rocksgreen97 is offline
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Default RE: a/c evaporator replacement

ok i think illoffer my neighbor some beer to helpme hold it in place and takea stab at it first thing tomorrow thanks for the info guys ill let ya know how it turns out.. nice avatar by the way too many problems to circle......
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Old 11-02-2007, 05:48 PM
davmelrach davmelrach is offline
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Default RE: a/c evaporator replacement

Thanks for the pics Koldkut. I should have put them on the original. I am glad it worked out for you as well. I really didnt think it was all that bad. As for removing the heater core without unhooking the evap... ( I dont see it happening at all, but maybe you can do something I dont know about)
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Old 11-02-2007, 08:22 PM
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Default RE: a/c evaporator replacement

Quote:
ORIGINAL: davmelrach

Thanks for the pics Koldkut. I should have put them on the original. I am glad it worked out for you as well. I really didnt think it was all that bad. As for removing the heater core without unhooking the evap... ( I dont see it happening at all, but maybe you can do something I dont know about)
It can be done, but it requires holding your tongue *just so* and massive amounts of swearing. I will post pics of what mine looks like.
*EDIT*

Here you go:
Click the image to open in full size.

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Old 11-10-2007, 06:09 PM
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Default RE: a/c evaporator replacement

OK, got my heater core from Rock Auto (http://www.rockauto.com) and it is the exact match to the OE core. It's copper/brass wrapped in foam. I got some foam from a local hobby store to replace the piece that goes between the core pipes and the firewall. Here is what the new setup looks like:
Click the image to open in full size.

Click the image to open in full size.
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Old 12-10-2007, 06:07 PM
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Default RE: a/c evaporator replacement

Quote:
ORIGINAL: rocksgreen97

man you guys are awesome for throwin this post up here thanks for the details i was sweatin this crap.......but i do have one question, seeing that I am simply just replacing the heater core and not the A/C evap, do I HAVE to discharge the a/c? or is there some way to remove the heater core by itself w/o pulling the whole thing out? maybe cutting the box or something then JB'ing back together? cause im scared to mess with the A/C system and my local shop wants $150 freakin dollars just to discharge my system for me ><, thanks again guys
i have the exact same question. i would prefer not to discharge the A/C system if i don't have to.
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Old 12-10-2007, 06:07 PM
 
 
 
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2000, 2003, ac, accumulator, caravan, condenser, core, disconnect, dodge, durango, evaporator, heater, hose, lines, neon, removal, replacement, stuck

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