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heater core replacement

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Old 04-26-2008 | 07:25 PM
  #1  
mbaker's Avatar
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From: Joplin, MO
Default heater core replacement

Has anybody ever replaced the heater core on thier xj? Mine is leaking and I tried to tackle it today, and I think I am going to have to dissasemble the whole dash to get it out. Do I have to suck out the freon or is there enough room to get the core out? I guess if all fails get a manual( laughing). yeah right.
Old 04-26-2008 | 08:17 PM
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From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
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There is no freon in a heater core. The FSM says you will need to disassemble the whole dash. I have no experience in changing a heater core but the FSM makes it look like a very involved job. You should get a FSM for your year Jeep and read it before trying to do this on your own. Good luck.
Old 04-26-2008 | 09:22 PM
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I know there is no freon in the heater core, I ment is there enough room to get the heater core out without removing the evaperator. I read another blog and it said that it takes about 5 hours to replace and the console and most of the dash has to be removed along with sucking out the freon. So I think I will wait untill it starts to get cold again to tackle it, thanks for the info though.
Old 04-26-2008 | 10:10 PM
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X2 on the F.S.M!! A heater core job is one of those that you can wind up with a bucket of parts left over if you don't know what you're doing. At least the F.S.M. will give you proper instruction! It sounds like a pretty sh!tty job, though!! GOOD LUCK, post up how it goes!!
Old 04-27-2008 | 09:11 AM
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Yes the freon has to be recovered and the dash has to be removed and steering column. Airbags? Unhook the battery for 5-10 minutes before going after bags. It's bad to blow one when your not sitting in the seat, could break an arm or neck!
Old 04-27-2008 | 09:35 AM
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The entire lower half of the dash has to be removed... Its not a fun job. Just make sure to take off the heater hoses before trying to pull the heater core out...


Edit... I got to thinking so I pulled the FSM out... Yep you have to discharge the A/C system... The lines for the evaporator go through one part of the housing you have to remove...

Last edited by whowey; 04-27-2008 at 09:47 AM.
Old 04-27-2008 | 05:15 PM
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thanks for everybodies help/ I think I am going to wait untill I have more time to dedicate to such a job. This is still my daily driver and to put it out of comission ans something not go back together right, might have me walking to work. I did by pass the hoses so it won't leak. Thanks.
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