[92wrangler]

I just did the heater motor upgrade all i can say is wow amazing. Blows twice as hard and feels like a leaf blower LoL. It took me about 3 hours to do was not to hard plus i had to rewire the new motor cause the new one only had a plug for power and not ground so i took it apart and re riveted it together. I highly recommend doing it.



Jason

[rustywrangler]

See people still learn new things on this forum.


Glad it worked out for ya.

-Rusty

[OneLung]

Where is the article on this forum for the 'YJ' heater-moter upgrade? I can only find the one for a CJ.

Thanks,

-OneLung

[rustywrangler]

Originally Posted by OneLung

Where is the article on this forum for the 'YJ' heater-moter upgrade? I can only find the one for a CJ.

Thanks,

-OneLung

The only difference that I see now, is that I am finding people are using either PM102 or PM105. The both seem to be almost the same but I have yet to see a true answer as to what part to use. I will be using PM102.


Thread talking about the writeup with links to writeup inside:
http://www.jeepforum.com/forum/showthread.php?t=210084&highlight=heater+blower+mo tor+upgrade

Link to Part at advanceautoparts: http://www.partsamerica.com/ProductDetail.aspx?MfrCode=SIE&MfrPartNumber=PM102

Originally Posted by Cannon

OK, had some time (:20 min)to scratch around and although not any wire answers, heres the mods I did for heat-related:
1. "Better Heat in a YJ" dtd Dec 04. Kudos to Sentinal02 who posted how to cure the upper defrost vent woes and redirect heat onto us. That thread ran for weeks, and he was definitely on target! I've used ever since. http://www.jeepforum.com/forum/f12/better-heat-yj-122052/?highlight=sentinal+heater

2. "YJ Heater Motor Upgrade" dtd Aug 04 by Gary Soupy. It's a 'readers digest of increasing air flow with a Chev Heater Blower Motor. (Qtec board hijack). http://bbb.quadratec.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=4;t=000578#000000

3. "Jeep Heater Blower Motor Upgrade" dtd Nov99 by T. Howe. This is the article I based my walk-through on. Got the job done for under $30! Been lovin it ever since. Plus Sauce 90YJ, you'll get to know if somethin's missing while at it. http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=261421&searchString=Jeep%20bl ower%20motor%20upgrade

I'd figure that if the wires aren't there on the engine harness, all it would take is a wire fab from the heater control in the dash harness to the motor-whether you do the upgrade or not. Seem to recall it was nothing more than a pigtail of two male (or female) prongs attached to the motor. So run a circuit from power, heater control in dash, and blower motor.

Have worked the last 10 days straight with 3 more to go, so uncle sam's gonna love me come next paycheck, now what to 'fab/fix/maintain next (gotta get that hard top off). Good luck! & let us know what you figured out with the '4.0.

[89YJmoneypit]

Actually as far as the part# goes, all you need to do is ask for a YJ blower motor. I've checked at several major parts suppliers and the Siemens part# for Blazers and non-a/c YJs is PM102. Somebody must have realized that most people were getting the Blazer motor anyway. PM105 is for Blazers with a/c or heavy duty heaters.

[rustywrangler]

Originally Posted by 89YJmoneypit

Actually as far as the part# goes, all you need to do is ask for a YJ blower motor. I've checked at several major parts suppliers and the Siemens part# for Blazers and non-a/c YJs is PM102. Somebody must have realized that most people were getting the Blazer motor anyway. PM105 is for Blazers with a/c or heavy duty heaters.

That being said, if one were to get the PM105 would that be a better upgrade than the 102??????

[89YJmoneypit]

Yeah, I had wondered that myself. Don't know what the difference would be.

[jeeepguy]

The difference between them is 45cfm and the PM105 is 3/16" larger diameter. Mine works great.

[MLJeeper]

i got the 105 first by mistake, as i recall it will obstruct the squirrel cage.

[rustywrangler]

So for the simplest install, the PM102 is the way to go.....

[92wrangler]

i got the 3358 from advanced auto it is there part number for the 105. Now i did not have to cut the firewall or anything i slid the ring off the motor and then put the motor through and put the ring back on. What i had to do which was a major PITA was to rewire the motor to use the stock wiring harness. The new motor only had a post for a power and not a plug like the old one The post also hit the fire wall so the motor could not fit flush. That said on the new motor i had to drill out the rivits and disassemble it and rewire it so that it would sit flush and i could use the factory plug. I then put the motor back together and grounded it to my frame. I mean it was not really hard just more time consuming then anything else trying to get the brushes back in the motor and everything so it was right. I mean the motor swap made a world of difference. Any questions that i can help with PM me i'd be more then happy to try to help anyone i can.

Jason

[89YJmoneypit]

Originally Posted by 92wrangler

What i had to do which was a major PITA was to rewire the motor to use the stock wiring harness. The new motor only had a post for a power and not a plug like the old one
Jason

Newer YJs must be different, mine only had a single power wire in the harness.

[92wrangler]

yea maybe cause i had to rewire the motor. But i mean it was no biggy had to drill out the rivits and take the brushes and stuff apart and then put it back togther after soldering and heat shinking everything

[bob082484]

I know that this will work for early yj's but has anyone tried this for a late model yj?

[jeeepguy]

Late models don't require it as they already have upgraded heater motors. This was changed in the '92 model year. Before then the heater motors were poor at best.