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post #1 of (permalink) Old 12-08-2002, 08:52 PM
sgdane
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Chevy heater upgrade for a CJ7

I'm in the process of a complete off frame rebuild on a 84 CJ7. It started as a body swap... everyone knows how that goes. (As a novice, someone said it would only take 50-60 hours. -- Yeah right!)
Since starting this project a year ago my tools have multiplied like bunnies, and I have learned how to weld, all sorts of bodywork, needed a total of 17 stiches, and spent more than I intended. Yes, I still love my Jeep!

This forum has been alot of help on upgrades like fuel injection, suspension do's and don't, ect., but the heater motor upgrade is one I'm having trouble with.
I purchased a heater motor for a 76 Blazer, enlarged the firewall openning, but the post that the fan connects to extends too far into the heater box. Do I have the right motor? It seems like too much fan blade to remove for fit. Am I doing something wrong?

First post - sorry if it was too long!
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post #2 of (permalink) Old 12-08-2002, 10:02 PM
 
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Re: Chevy heater upgrade for a CJ7

I can feel your pain. I'm about 80 hours into the same swap. I'm with ya, I wouldn't change anything. I've learned so much. For what it's worth I hope to be done before the year is up.

Alright, for the heater motor upgrade you need a '73 Chevy Blazer heater motor. You can tell the folks at the auto parts store you need a heater motor for a '73 Chevy Blazer with a 350 and air conditioning. The part is the same for all Blazers of that year regardless of engine size or air conditioning, but this is the normal questions from the parts gurus [img]images/graemlins/wink.gif[/img]. The part should cost about 26 bucks.

If your looking for a motor from a Junk Yard, check a Chevy pickup, GM pickup, Blazer, or Jimmy from '71 to '76. The motor may have the part number "1312" on it.

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post #3 of (permalink) Old 12-08-2002, 10:43 PM
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Re: Chevy heater upgrade for a CJ7

1. Welcome to the forum.
2. Thanks for completing your user profile:
3. I assume you read the New Posters Message at the top of the forum.
4. Participate! Two brains are better'n one!
5. You've got the wrong motor.
6. Buyer Beware! Here's what I have for information:

Vendor..................Part #
ACI.......................33892
Everco..................M892
Murray..................208971
4 Seasons............35587
Siemens................PM102E (This is the Maker of the motor)
NAPA.....................455-1039 silverline
.............................655-1039 premium
Factory Air............35587
Kragen.................35587
YJ replacement.....PM102E

Fits, except for a long shaft
NAPA.................455-1076 &lt;======== <font color="red"> II'd bet this is the motor you have. [img]images/graemlins/mad.gif[/img] </font color>
Shucks...............33892
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post #4 of (permalink) Old 12-10-2002, 08:11 PM
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Re: Chevy heater upgrade for a CJ7

The best thing to do is take your stock blower motor to the parts store with you (or have them pull a new CJ blower if your is gone). Match up the shaft end (where the fan seats) to mounting surface length with the new motor. I had the guy at NAPA pull 4 motors of the same part number before finding one that was short enough. All of the shafts seem to be somewhat different lengths as GM didn't have the space restriction in their air-boxes that our Jeeps do.
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post #5 of (permalink) Old 12-11-2002, 08:11 PM
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Re: Chevy heater upgrade for a CJ7

I had the same problem when I did the blower moter upgrade. The blower motor you need is for the Blazer without A/C. Take your old blower motor with you and check the shafts to each other.
post #6 of (permalink) Old 12-11-2002, 10:19 PM
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Re: Chevy heater upgrade for a CJ7

Yup, I had the same problem. The one WITH AC was too long. The one withOUT AC is still blowing strong. [img]images/graemlins/laugh.gif[/img]
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post #7 of (permalink) Old 12-12-2002, 06:05 AM
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Re: Chevy heater upgrade for a CJ7

I used the Factory Air 35587... Fits like a glove and no problem with the shaft.... [img]images/graemlins/laugh.gif[/img]
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post #8 of (permalink) Old 12-15-2002, 09:10 PM
sgdane
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Re: Chevy heater upgrade for a CJ7

Thanks to all for the advise!
We can add Siemens PM105A to the long shaft list.

What do you do with the 1 inch hole in the side of the motor? Cover or leave open? It look like a good place for mud to get trapped in.
post #9 of (permalink) Old 12-15-2002, 09:14 PM
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Re: Chevy heater upgrade for a CJ7

Cover the hole.
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post #10 of (permalink) Old 12-16-2002, 07:28 AM
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Re: Chevy heater upgrade for a CJ7

It's for cooling. I went to the junk....er recycling center and got a 90 degree hose meant for it and stuffed the end with air filter material(not fiberglass) to keep it from being plugged.
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