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post #1 of (permalink) Old 09-05-2002, 11:49 PM Thread Starter
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Heater Core Replacement?

Well, last night I had the joy of looking over at my floorboard and seeing some green liquid on my mats. Yippee, could it be that my heater core is gone? I need to do some more inspecting, but if it's gone, who's the best place to get one(local or parts catalog?) and any suggestions replacing it? I've never done a heater core. I have a Haynes and a Chiltons, but both seem a bit conflicting(as usual). I got the impression one said the whole heater box must come out, and the other seemed like it didn't need to come out. Thanks.
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post #2 of (permalink) Old 09-05-2002, 11:52 PM
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Re: Heater Core Replacement?

On a CJ, the entire box must be removed. It was a fairly straightforward affair. While I was in there, I cleaned and lubed everything.

To get the box out from a CJ (which shouldn't be TOO much different) involved unscrewing a few nut on the engine side of the firewall and then the fan to intake tube screws. Next jockey it out!

I got a nice replacement from 4WD Hardware. They've treated me well.

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post #3 of (permalink) Old 09-06-2002, 04:18 AM
 
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Re: Heater Core Replacement?

It's worth mentioning that there is one often overlooked nut that holds the box to the firewall that is directly behind the valve cover. (I6)
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post #4 of (permalink) Old 09-06-2002, 05:03 AM
 
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Re: Heater Core Replacement?

Jamgood, I had to replace the fan motor in my 87 YJ, and suffice it to say it was a PITA. Now, one of the things that made it a particular PITA was the fact that I still have the AC ducting in the Jeep (although the AC doesn't work). As I recall getting it out is not very complex, but it took a LOT more wrestling with the housing and such than I thought it would. Good luck and let me know if you run across anything and get stuck.
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post #5 of (permalink) Old 09-06-2002, 05:44 AM
 
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Re: Heater Core Replacement?

Yeah, I ran into that one. Come to find out that due to a busted tranny mount, the stud for the nut had started to wear a pretty deep groove in the back of my brand new metal valve cover. Luckily it didn't go through.
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post #6 of (permalink) Old 09-06-2002, 07:45 AM
 
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Re: Heater Core Replacement?

While you have that heater box out take the time to replace all of the foam gaskets on the doors. It's also not a bad time to look at the defroster ducting. I few holes and tears in it can really make the defrosters seem enemic.
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post #7 of (permalink) Old 09-06-2002, 02:15 PM Thread Starter
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Re: Heater Core Replacement?

Where can I get some foam gaskets for the doors? Also, I see some places online offer some seals. One for heater motor to firewall, and another for heater core tubes to firewall. Should I pick those up? Are all heater cores built the same? I'd rather not redo this in a year. I've found local places that want $90, and some online places that want $44.
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post #8 of (permalink) Old 09-06-2002, 02:29 PM
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Re: Heater Core Replacement?

Yes, get the seals now so you don't have to take it apart later. Might also want to do the blower motor upgrade.

You can get new door seals from JCWhitney. They aren't that expensive.
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post #9 of (permalink) Old 09-06-2002, 02:40 PM Thread Starter
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Re: Heater Core Replacement?

Blower motor upgrade? I thought that was a CJ thing?
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post #10 of (permalink) Old 09-09-2002, 03:24 PM
 
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Re: Heater Core Replacement?

Sorry about the late reply. I've been off on a early b-day celebration. I would pickup some foam weather stripping gaskets from the hardware store.
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