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Unread 10-18-2011, 07:00 PM   #1
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Join Date: Oct 2011
Location: Elba, NY
Posts: 7
91 blower motor replacement

I have traced my heating problems to the blower motor and am a little puzzled as to how to replace the motor. I appears to be sandwiched between the fire wall and the venting shrowed. I hope that this is not the case as I can not find the bolts to remove either. Hoping that someone can shed some light on this case. Thanks.

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Unread 10-18-2011, 07:22 PM   #2
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1990 YJ Wrangler 
Join Date: Jan 2009
Location: , Michigan
Posts: 458
You will have to take out the whole heater box assembly and Its kind of a pain. From what I remember there were 4 main nuts on the firewall on engine side that held it in (not including the rest of the crap in the way to get it out). You also have to take off the heater core hoses from inside the firewall so you might want to consider changing the heater core while its out. I didn't change mine but most people recommend to. It was worth it in the end for me. I put in a blazer blower motor and it's like 5 times more powerful than the stock blower motor
My 1990 YJ Build Thread: http://www.jeepforum.com/forum/f22/might-well-start-build-thread-now-my-1990-yj-1291174/
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Unread 10-19-2011, 03:50 PM   #3
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1991 YJ Wrangler 
Join Date: Nov 2010
Location: Mechanicsville, MD
Posts: 105
Ditto what uhohth50 said. Be careful if disconnecting the control cables, those plastic fasteners are brittle with age and difficult to find replacement cables. I have not figured out the trick to getting those disconnected. You will have to open the heater box to replace the heater core. Point is do all the maintenance you can while it is out, since there is a lot of disassembly involved in getting to it.
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Unread 10-19-2011, 05:56 PM   #4
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1987 YJ Wrangler 
Join Date: Jun 2008
Location: Newnan / Macon, Georgia
Posts: 2,818
search PM102 blower upgrade if you want the upgrade. i think its 87-91 that have the smaller motor IRCC
-1987 YJ
Jeep Build
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