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Unread 01-20-2003, 07:33 AM   #1
Boston Mangler
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YJ Heater Core and Heater Motor Replacement??

hey guys

i got to replace my heater core in my 1990 YJ and this looks like a nightmare of a job

is this really as bad as it looks or are there any tricks??

thanks

also, anyone have any info on the blazer motor upgrade while i am in there?

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Unread 01-20-2003, 02:05 PM   #2
BamaJeeper
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Here's a link to the motor upgrade.

http://www.4x4wire.com/jeep/tech/interior/cjheater/

There's alot of other useful info on that site.
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Unread 01-20-2003, 04:25 PM   #3
89YJmoneypit
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I replaced my heater core a few months ago and it wasn't too awful bad.The biggest pain for me was getting to the nuts on the firewall behind the engine,since you have a 2.5 it might not be as tight for you though.Takes a little wigglin to get the box out from under the dash too.
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Unread 01-20-2003, 05:38 PM   #4
Boston Mangler
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thanks guys
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Unread 11-25-2009, 11:10 AM   #5
Gearhead231
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Yeah, Its an ok job. Just make sure you have all of your tools. Mabey have a friend help. Mounting the dash was intresting....

Tell me how it works out for you. I just did mine last week.
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Unread 11-25-2009, 04:55 PM   #6
89YJmoneypit
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I don't think you're gonna get an answer from him.....

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.... This thread is almost 7 years old, but thanks anyway for searching





Also fyi to anyone that cares, there is no "Blazer motor upgrade" anymore, the YJ and the Blazer use the same part number now.
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97 ZJ Laredo
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Marseilles Fire Dept: http://www.flickr.com/photos/4461494...th/7659346164/
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Unread 11-25-2009, 05:34 PM   #7
Leans93
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Be careful when you are taking off the small plastic clips that attach the cables to vents that they operate. I broke all of them taking it off when I did mine and now my vents dont work correctly. Not a huge deal but kinda annoying.
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Unread 11-27-2009, 10:01 PM   #8
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thought i had to replace my blower motor. turned out to be the switch. glad i thought about checking that out before i tore into the disassembly to change the motor out.
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Unread 11-27-2009, 11:29 PM   #9
Tompatt
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i say change out the motor and core. upgrading to the bigger motor isnt that hard.
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Unread 11-28-2009, 11:07 AM   #10
moonshinefuel
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It's not like replacing a heavy transmission, it is very light, the box, just an annoying job do to the awkwardness and reaching under the dash, etc. I have some pictures of my experience, it's not a big deal, just be patient with it as you can. Easy on the cable clips, try not to break them if you can help it. http://www.jeepforum.com/forum/f12/h...cement-870988/
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Unread 11-28-2009, 11:36 AM   #11
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Quote:
Originally Posted by 89YJmoneypit View Post
I don't think you're gonna get an answer from him.....

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...And yet 4 more posts giving him advice. Amazing.
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Unread 11-29-2009, 09:31 AM   #12
89YJmoneypit
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89 YJ
Transplanted '99 4.0, AX-15, NP231
Red Jeep club #8

97 ZJ Laredo
4.0, 42re, NP242
Was my daily driver, now son's college wheels.

Marseilles Fire Dept: http://www.flickr.com/photos/4461494...th/7659346164/
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