Ideas for an a/c with a serpentine belt 1981 4.2 cj7 258 - JeepForum.com

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post #1 of 17 Old 12-27-2014, 11:07 AM Thread Starter
81azcj7
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Ideas for an a/c with a serpentine belt 1981 4.2 cj7 258

I was reading several threads about installing an a/c in a 4.2 cj7. But, I couldn't find any with a serpentine belt. What I have is 1981 4.2 with a serpentine belt, I'm looking for a complete unit to install into the old cj. I've looked at Collins Bros and JeepAir, but theirs is just for v-belts. Anyone have any ideas or run into this before? Thanks

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post #2 of 17 Old 12-27-2014, 11:09 AM
Mike Romain
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Maybe check for YJ 258 ones?

Mike
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post #3 of 17 Old 12-27-2014, 11:50 AM Thread Starter
81azcj7
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I had thought about that too. It seems like it would work, I had called Jeepair, I asked lady answering the phone about it she said they didn't have anything that would work. So, I thought someone on here would have run into the same problem. Thanks
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post #4 of 17 Old 12-27-2014, 08:12 PM
chromegrille
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Only difference out of the whole set-up would be the ac compressor clutch.
All 1981 and later CA models were serpentine with Sanden compressor.


Worse case...?....buy one of the kits and change the Sanden compressor clutch?
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post #5 of 17 Old 12-27-2014, 08:54 PM
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Quote:
Originally Posted by 81azcj7 View Post
I was reading several threads about installing an a/c in a 4.2 cj7. But, I couldn't find any with a serpentine belt. What I have is 1981 4.2 with a serpentine belt, I'm looking for a complete unit to install into the old cj. I've looked at Collins Bros and JeepAir, but theirs is just for v-belts. Anyone have any ideas or run into this before? Thanks
California models used serpentine belts and AC. The donor block I rebuilt was from an 81 originally built for California and it had AC and a smog pump. The pump is long gone but the AC compressor is now being used for OBA. The AC was a Sanden pump if that helps.

Opps. I should have read chromegrills post before I hit send.

It's just a Jeep, and if you don't wheel it once in a while, it's not even that.
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post #6 of 17 Old 12-27-2014, 09:48 PM Thread Starter
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Thanks for the information, I will call them on monday and see if Sanden has anything available.
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post #7 of 17 Old 01-24-2015, 07:02 PM Thread Starter
81azcj7
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Bump - I called Sanden and they said they wouldn't have a compressor that would fit on a 81 cj7 4.2 258 with a serpentine belt. Anybody else have an idea as to what would work. I would like to keep it a serpentine, and not change to v-belt. Thanks
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post #8 of 17 Old 01-24-2015, 07:04 PM
Mike Romain
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Quote:
Originally Posted by 81azcj7 View Post
Bump - I called Sanden and they said they wouldn't have a compressor that would fit on a 81 cj7 4.2 258 with a serpentine belt. Anybody else have an idea as to what would work. I would like to keep it a serpentine, and not change to v-belt. Thanks
It is a 4.2 and they made them with serpentine belts up to 91. Same setup as far as I have seen.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #9 of 17 Old 01-24-2015, 07:59 PM Thread Starter
81azcj7
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Thanks, when I called Sanden the tech support guy said he had ran into this issue before, but he never could supply the compressor. He said some guys just made something work by shimming, he wasn't too sure. I was looking on their web site and all the 4.2's that they have for wranglers are v belts. I did find that it has a SD7 Direct Short mount. I'm going to look further into it, found some conversion brackets called a york to sanden claw d36. Maybe that will lead me somewhere.
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post #10 of 17 Old 02-26-2015, 07:53 AM
Rolandt03
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can you not just change the v belt pulley out for a serp. belt pulley? using the same compressor.
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post #11 of 17 Old 02-26-2015, 08:26 AM
Mike Romain
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can you not just change the v belt pulley out for a serp. belt pulley? using the same compressor.
Not easily or cheaply. You need a different water pump and fan setup as the serpentine has those going in reverse. Then you either need a new PS pump or you can attempt to change the pulley, same for the harmonic balancer and alternator.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #12 of 17 Old 02-26-2015, 11:10 AM
Rolandt03
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I would call jeepair.com there customer service is pretty good. if any one knows how to make it happen they will. they are the original makers of the a/c units. when I installed the 30 year old system in my jeep, it still had the contact info sticker on it. cant remember if they were a diff name or not. they were very helpful just over the phone. have to say, my little unit in the jeep actually works pretty good.
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post #13 of 17 Old 02-26-2015, 07:17 PM
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i have a serp belt on my '86 a/c equipped cj7
i just bought the jeep, but its a Cali jeep originally
..but i think the seller said the a/c was installed w/in the last year????
all i know is when i looked under the hood and saw a serp belt, i was like WTF??!!??

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post #14 of 17 Old 02-26-2015, 07:22 PM
Rolandt03
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Frank.

Post some pics if u can, that would prolly be the most helpful to get this fig out
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post #15 of 17 Old 02-26-2015, 07:30 PM
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here's the only pic i have right now


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