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Unread 02-19-2013, 03:37 PM   #1
Spanovich008
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1995 ZJ 
 
Join Date: Nov 2012
Location: Morgantown, WV
Posts: 58
Things to fix/check for while dash is out?

So my heater started to blow luke-warm again (heat is about 100F at startup, and 130F after an hour of driving.) So I flushed out the heater core and absolutely NO dirt, grime, rust, etc. came out. I took the Jeep to the dealership to let them take a look at it, as well as replace the stripped Lug-nuts on the front two tires.

To make a long story short, they told me that my heater core is shot, and it needs replaced. I don't have $750 at the moment, but I do have $60 that I can use to pick up a Spectra Heater Core this weekend.

I'm going to give it a shot this weekend, removing the dash, replacing the heater core and the whole nine yards, but my question is......what else should I check/fix/replace while I have the dash out. I hear blend doors are an issue, however i'm fairly sure they're working correctly. Also, my A/C blows fairly cold (not super cold, only fairly cold) on hot days so I'm definitely going to give the evaporator an inspection. These are the only two things I have planned, but if anybody has any other suggestions, please let me know. Thanks!

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Unread 02-19-2013, 07:25 PM   #2
KoreaZJ
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1994 ZJ 
 
Join Date: Aug 2011
Location: GANGNAM STYLE
Posts: 2,666
Inspect mode/blend doors, linkages, wiring. For manual control type, check vacuum lines, especially the black line going through the firewall.

If heater core is not plugged and flows well, how can it be shot?
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Unread 02-20-2013, 09:11 AM   #3
Spanovich008
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1995 ZJ 
 
Join Date: Nov 2012
Location: Morgantown, WV
Posts: 58
Okay will do, thanks for the advice.

And honestly, about the heater core, I don't really know what exactly is wrong with it. All I know is that I back-flushed it once, then was puzzled because no dirt/debris came out, so I took The Works - Toliet Bowl Cleaner (very powerful stuff) and let it sit in the heater core for about an hour, back-flushed it again, and STILL no dirt came out.......yet it still blows luke warm air despite the ambient air temperature. 120F - 130F isn't that hot especially in 10F-20F weather. My dad's Explorer and my Mom's Honda both blow nearly 170-180F after about 10 minutes after driving. All of these temperatures were verified with an Infrared Thermometer.
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