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A/C Evaporator Core repair

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Old Apr 11, 2013 | 07:23 PM
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Originally Posted by jbain2
Found this forum while looking for DIY on heater core removal. I am pretty sure that mine is bad. I get an antifreeze smell when turning on my heat, the defrost is very slow and right when I turn the car on, I hear rushing fluid behind my dash on the passenger side. Is it possible that it is something else (AC evap, etc)? Thanks.

2002 Grand Cherokee Laredo 4.7L
Welcome to CF. The anti-freeze smell indicates a leaking heater core, and the sloshing fluid sound behind the dash is from the HVAC box drain being clogged, and this allows the box to fill up with either AC condensation, or in your case anti-freeze. It usually leaks onto the passenger side floor boards at some point.
The drain is accessible from underneath next to the passenger side frame rail near the firewall.
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Old Apr 11, 2013 | 07:24 PM
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Originally Posted by 4x4addict
I am a DIY guy, with a jeep I got a great deal on. 2002 GC with a 4.7. Only 60,xxx on her! I am also about to need the pages if possible, as this is the trucks main issue. Any links or pages would be great, thanks!
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Old Apr 11, 2013 | 07:30 PM
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Originally Posted by ghostspartan99
Hey guys. I'm new to cf and could use a little help. I've been trolling cf for awhile and decided to join in and not be an outsider anymore. I'm doing an evaporator replacement on a 98 jeep Cherokee. Any info on how would be GREATLY appreciated!
Thanks, Dave
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Old Apr 12, 2013 | 09:31 AM
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Originally Posted by ol"blue
Welcome to CF. The anti-freeze smell indicates a leaking heater core, and the sloshing fluid sound behind the dash is from the HVAC box drain being clogged, and this allows the box to fill up with either AC condensation, or in your case anti-freeze. It usually leaks onto the passenger side floor boards at some point.
The drain is accessible from underneath next to the passenger side frame rail near the firewall.
Thanks for getting back to me. Shortly after I posted this, my water pump went. Swapped that out, no more sloshing or antifreeze smell. I will check the drains as an aside. Not sure if I should pursue looking into the heater core, given the original symptoms are gone?
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Old Apr 12, 2013 | 10:08 AM
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Talking Evap core
Thank you very much for the reply Dan! Should make my replacement process go much more smooth.
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Old Apr 14, 2013 | 10:13 AM
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I guess I'm not the only one with this problem. Ha! Hi everyone, I'm Joe. I to am about to tear into my heating/cooling system on my 98'. Please help Ol' Blue!
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Old Apr 17, 2013 | 05:15 PM
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Default Evaporator Core Headache
Looks like it's my turn to tackle this task. Are you guys having any success with making this an easy job? Yanking out the dash sound like a huge PITA. I have a '99 Cherokee that I've pretty much ripped the entire a/c system out - next is the core.
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Old Apr 22, 2013 | 12:18 PM
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Can I get a copy of the procedure? I'm almost ready to replace the evaporator and want to be sure if a need to remove the dashboard at all. Thanks
2000 XJ
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Old May 2, 2013 | 02:08 PM
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Default 2001 Jeep Cherokee XJ
I too would appeciate the details for the procedure. I have a 2001 Jeep Cherokee XJ which requires the replacement of the in dash AC components.

Thanks in advance.
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Old May 4, 2013 | 06:37 PM
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Originally Posted by jbain2
Thanks for getting back to me. Shortly after I posted this, my water pump went. Swapped that out, no more sloshing or antifreeze smell. I will check the drains as an aside. Not sure if I should pursue looking into the heater core, given the original symptoms are gone?
Sorry to hear about the water pump failure. A cooling system pressure test will indicate if the heater core is leaking/not holding pressure. Listen at the heater box for pressure/coolant escaping.
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Old May 4, 2013 | 06:38 PM
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Originally Posted by ghostspartan99
Thank you very much for the reply Dan! Should make my replacement process go much more smooth.
You're very welcome.
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Old May 4, 2013 | 06:40 PM
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Originally Posted by fast240
I guess I'm not the only one with this problem. Ha! Hi everyone, I'm Joe. I to am about to tear into my heating/cooling system on my 98'. Please help Ol' Blue!
Hey Joe, Welcome to CF. I'll send you a Private Message.
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Old May 4, 2013 | 06:57 PM
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Originally Posted by Ray1117
Looks like it's my turn to tackle this task. Are you guys having any success with making this an easy job? Yanking out the dash sound like a huge PITA. I have a '99 Cherokee that I've pretty much ripped the entire a/c system out - next is the core.
I haven't heard of any easy ways yet, short of having someone else do it. I'll send you a Private Message.
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Old May 4, 2013 | 07:10 PM
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Originally Posted by Chino
Can I get a copy of the procedure? I'm almost ready to replace the evaporator and want to be sure if a need to remove the dashboard at all. Thanks
2000 XJ
I'll send you a Private Message.
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Old May 4, 2013 | 07:14 PM
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Originally Posted by Seawulf
I too would appeciate the details for the procedure. I have a 2001 Jeep Cherokee XJ which requires the replacement of the in dash AC components.

Thanks in advance.
Welcome to CF. I'll send you a Private Message.
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