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Old April 19th, 2010, 08:35 PM   #1
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Default CJ-5 Heater Blower Upgrade

Ok, Gang, I remember over on JeepForum a few months back that there was a lot of discussion about the definitive blower motor upgrade. As I remember it, the trick was to get a certain Chevy Blazer blower motor, I think it was "Mid 70's from a vehicle without AC" and then the associated fan switch. Sadly, the conversation centered around the CJ-7, which, if I'm correct, mounts the blower under the hood, into the firewall, and not under the dash like on my CJ-5. I have the dash pulled down and have been redoing the wiring and adding gauges, and now is the time to do this upgrade if I can figure out what works and what I need.

Has anyone ever done this, and if so, can you help me with both part numbers and the physical modifications needed to the sheet metal in order to mount the new fan? Any help of advice would be greatly appreciated.

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AC
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Old April 19th, 2010, 09:00 PM   #2
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What year CJ5?
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Old April 19th, 2010, 09:54 PM   #3
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Sorry. 1977 Fiberglass body 304 T-150 D-20. More than you needed, I know, but thought I'd throw it in...

Thanks!
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Old April 20th, 2010, 06:19 AM   #4
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I did the conversion on a late 70s CJ5 and it was the same as on my CJ7. No need for a new switch either.
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Old April 20th, 2010, 06:25 AM   #5
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I don't have the old switch, though, so I need a switch and might as well get the one that works the best. However, what blower motor did you use, and what sort of modification was needed to fit the new motor into the hole? Have any idea about a part number, or anyway a make/model designation?

Thanks!
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Old April 20th, 2010, 01:12 PM   #6
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Go to into CJ Tech on JF, click "Search This Forum", and type in "PM102". That will give you 44 threads about the Heater Blower Motor upgrade which indicate what to buy, and how to do it.
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Old April 20th, 2010, 05:13 PM   #7
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Kinda figured you'd be the guy to steer me right, PP. Thanks!
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Old April 21st, 2010, 07:58 PM   #8
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Well, damn! After quite a bit of perusing the JeepForum "PM102" threads, the hot rumour is that the whole mod is for 1978 and later (blower motor mounts from engine compartment side, not dash side) only. I could get the motor and try to be a trail blazer, but not sure I want to be a test case right now. And, as the two mounting systems are directly opposite of each other, I can kind of convince myself that the rotation of the motor might be wrong, and in fact backwards.

So, in sum, I'm stuck. Anybody have any info on how/if the blower upgrade can be done on a 1977 CJ-5?
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Old April 21st, 2010, 08:05 PM   #9
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http://www.jeeptech.com/body/heater.html
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Old April 21st, 2010, 08:33 PM   #10
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Yeah, I appreciate the steer, but actually, it was this article that convinced me that it won't work for me. If you go back and look at the second paragraph in that article you'll see that the author states that he doesn't think it will work in the 1977 body style. Again, it MIGHT, and might be a cool experiment, but I have the whole dash apart and wires everywhere, and I need to be back up and running by the weekend after this one, as I have some cool up north event to attend with the guys from Unlimited Offroad Centers up in Fenton. Not name dropping, they're damn near as dorky as I am, but I need to make sure I have things up and operational for this, and taking a flyer on this whole mod, which might be a can of worms, isn't really what I want to do right now. That's why I'm looking hard for a definitive answer to if this is possible and how to do it in the 1977...

Still, thanks for the try.
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Old April 21st, 2010, 11:04 PM   #11
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Nobody cares about "name dropping".
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