Heater Core
11-16-2018, 06:29 PM
#1
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Heater Core
Getting ready repalce the heater core and I want to make sure this is the first and last time to have to do it.
OEM core is NLA, anyone have any long term experience with a brand that fit and is standing the test of time?
OEM core is NLA, anyone have any long term experience with a brand that fit and is standing the test of time?
11-18-2018, 07:30 AM
#5
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
11-18-2018, 09:10 AM
#6
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11-19-2018, 03:15 AM
#7
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Year: 99 94
Model: Cherokee (XJ)
Engine: I6
Mediocre heat output compared to the stock one. Cherokee heat is lacking compared to my 94 Mazda 4.0 and my cousins 1500 Chevy.
Last edited by MonacaYankee; 11-19-2018 at 03:18 AM.
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11-19-2018, 04:57 AM
#8
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Year: 1990
Engine: Renix 4.0
It looks like the mopar 4874045, Valeo 515099, and everything copper have been long discontinued.
I would wager that the Crown Automotive 4874045 is about as good as you can get right now. The Omix-ADA 17901.04 probably isn't bad though.
I would wager that the Crown Automotive 4874045 is about as good as you can get right now. The Omix-ADA 17901.04 probably isn't bad though.
Last edited by craigjacob1; 11-19-2018 at 05:23 AM.
11-19-2018, 06:19 AM
#9
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
\Your 94 came from the factory with a heater control valve.....Is yours still on there?
If so, eliminate it and plug the vacuum line going to it.
11-19-2018, 05:52 PM
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Year: 99 94
Model: Cherokee (XJ)
Engine: I6
I checked the heater control valve. It does not leak and functions fine. It is a Napa replacement I believe. Will deleting it noticeably increase heat output?
11-19-2018, 06:31 PM
#11
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Possibly. Check the temp of the hoses on either side of it. They should be the same temperature.
There is no downside to removing it and a few benefits.
11-19-2018, 09:31 PM
#12
Old fart with a wrench
IDK if this helps, but the heater in my 2000 Cherokee Sport doesn't have a control valve and the heater turns the cabin into a sauna if you've got it on medium blower with all the windows up. Much better than my WJ is even after a core change. My mechanic friend found me a copper and brass core from Leiland Radiator for $73 for the WJ. We had put a Spectra in it and it leaked within an hour. One of the pipe welds where they go into the core was cracked. Tearing the dash out TWICE wasn't fun!
11-19-2018, 09:32 PM
#13
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I think Yankee should bypass the valve and see what happens.
11-19-2018, 09:38 PM
#14
Old fart with a wrench
Oh, absolutely! Don't do any more than is necessary. There are enough other problem to work on usually! LOL!
11-21-2018, 11:05 PM
#15
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Year: 99 94
Model: Cherokee (XJ)
Engine: I6
It seems like the uac brand has the thickest core tubes and fins compared to the spectra brand where just the sides are thick. https://www.rockauto.com/en/catalog/jeep,1999,cherokee,4.0l+l6,1431776,heat+&+air+cond itioning,heater+core,6864
opinions? I want to put the best in my 99. Might call dealers to find a mopar on the shelf. Mopar evap is still available.
opinions? I want to put the best in my 99. Might call dealers to find a mopar on the shelf. Mopar evap is still available.