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Unread 12-07-2011, 06:43 PM   #1
EYPUFF
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1995 ZJ 
 
Join Date: Feb 2003
Location: Fullerton, CA
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Smells like teen spirit..

And by teen spirit, I mean coolant.

For the past 6 months or so, the interior of my jeep has smelled like coolant. I'm thinking the heater core is to blame, but I just need someone to confirm it.
Here are the symptoms:

1.) Constantly smells like coolant.
2.) Smoke/Vapor comes through vents and fogs up windshield.
3.) Heater barely works, more lukewarm than hot.
4.) A/C doesn't work. (I get the ER message at every startup.)

Number 4 probably has nothing to do w/ the heater core, but I thought it might help. So any thoughts?

And if my suspicions are correct, how hard (read: pita) will it be? Any brands I should avoid? And anything I should do while I'm in there?

Thanks for all your help!
EY

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Unread 12-07-2011, 07:37 PM   #2
Candymancan
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heater core is bad, replace it. That or the hoses going to it. but most likely the heatercore.
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Unread 12-07-2011, 08:55 PM   #3
phitmein
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Is the lower part of your winshield above the vents getting a oily looking sheen to it that you can't wipe off easily with a paper towel?

If so it's the heater core.

They are no fun to replace on a ZJ because the dash has to be removed I think.
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Unread 12-07-2011, 10:07 PM   #4
freakinheep89
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Get an FSM before you do anything as far as removing the dash goes. Before I did it I would take it to an AC shop to have the HVAC system evac'd so you can replace the evaporator while you're in there. Not completely necessary but its such a poison to remove the dash its best to knock out whatever you can while you've got it apart.
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TJ-
[SIZE="1"][B]95 ZJ 5.2[/B]- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.[/SIZE]

[QUOTE=slayercr23;12630497]How would i go about Stroking it?[/QUOTE]
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Unread 12-07-2011, 10:59 PM   #5
low_blazer
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Definately sounds like the heater core is gone...
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Unread 12-07-2011, 11:26 PM   #6
squazz
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heater core it is, did mine in 10 days and that was with a week hospital stay so 2 long days will get it done I recomand buying a box of zip lock baggies cuz there are about 100 screws that need to come out and your not gonna remember where they all go so bagem and tagem
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Unread 12-07-2011, 11:34 PM   #7
phitmein
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Freak is 100% right and if you do try to do it yourself never work on a dash without a disconnected battery cable because of the danger of setting off the air bags.

If your Jeep were any newer then I bet you would be told to think about replacing the blend door thingy too.

It is a very hard job to do and if it was mine I would do it but pulling my engine would probably be easier.
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Unread 12-08-2011, 08:21 AM   #8
longne
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I just did this job on my 96. Its not as hard as it sounds, just be ready to dedicate a weekend to it. Do both the heater core and the A/C Evaporator to save yourself from having to do the job twice. It took me a few hours to get out the air box and after replacing the cores it was pretty easy to get it all back together. You'll probably want an extra set of hands to slide the dash off and to put it back. Other than that, its just tedious. I do suggest a panel popper and plenty of different size socket extensions. There is a step by step guide somewhere on the site, it will help to figure out where to find screws and bolts.
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Unread 12-08-2011, 02:26 PM   #9
EYPUFF
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Quote:
Originally Posted by phitmein View Post
Is the lower part of your winshield above the vents getting a oily looking sheen to it that you can't wipe off easily with a paper towel?

If so it's the heater core.

They are no fun to replace on a ZJ because the dash has to be removed I think.
Haha. Yes. The oily windshield has always been annoying.
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Unread 12-08-2011, 02:27 PM   #10
EYPUFF
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Quote:
Originally Posted by longne View Post
I just did this job on my 96. Its not as hard as it sounds, just be ready to dedicate a weekend to it. Do both the heater core and the A/C Evaporator to save yourself from having to do the job twice. It took me a few hours to get out the air box and after replacing the cores it was pretty easy to get it all back together. You'll probably want an extra set of hands to slide the dash off and to put it back. Other than that, its just tedious. I do suggest a panel popper and plenty of different size socket extensions. There is a step by step guide somewhere on the site, it will help to figure out where to find screws and bolts.
My A/C hasn't working in years.. is it because of the blend doors & A/C evap?
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Unread 12-08-2011, 06:31 PM   #11
longne
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Quote:
Originally Posted by EYPUFF View Post
My A/C hasn't working in years.. is it because of the blend doors & A/C evap?
Likely there is corrosion on both the evaporator and the heater core. Leaves and junk get into the box through the air intake from outside. Its likely that if you replace the evap, you can get the A/C up and running.
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