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Old 01-06-2009, 09:38 PM   #1 (permalink)
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4.0 A/C Delete

I've got a 1990 4.0 in my CJ7 and the A/C compressor just seized up on me. Anyone know if there is an A/C delete pulley that can bolt in its place ore do I have to try and make something?

All help greatly appreciated.

-Bill
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Old 01-06-2009, 09:58 PM   #2 (permalink)
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Not all 4.0's came with a/c option. So just get a belt for a 4.0 w/o air conditioning.
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Old 01-06-2009, 10:07 PM   #3 (permalink)
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Theres a pulley you can buy at most parts store.I got mine at napa. Its just a pulley with a mount thats bolts to the old compressor bolt holes.
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Old 01-06-2009, 10:16 PM   #4 (permalink)
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Why by a part you dont need? Just buy a belt....trust me. Done it, works great.
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Old 01-06-2009, 10:19 PM   #5 (permalink)
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Why by a part you dont need? Just buy a belt....trust me. Done it, works great.
Exactly just look at the serpintine belt sticker, under your hood.
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Old 01-06-2009, 10:58 PM   #6 (permalink)
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Yea just get the belt for a jeep w/o AC. Gives a little more power too. Hey, I felt it.
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Old 01-06-2009, 11:02 PM   #7 (permalink)
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its a great time to turn that a/c condensr into a trany cooler too
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Old 01-07-2009, 12:07 AM   #8 (permalink)
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its a great time to turn that a/c condensr into a trany cooler too
Or swap in a working one and turn it into onboard air....both good options.
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Old 01-07-2009, 05:21 AM   #9 (permalink)
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Or swap in a working one and turn it into onboard air....both good options.
there is a specific bracket with 4 vertical holes for the compressor that you can mount a york on using a small bracket from Kilby. pictures of this bracket are on his site. that is what is going in my AC compressor's spot
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Old 01-07-2009, 06:10 AM   #10 (permalink)
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You can't always just throw a shorter belt on, you have to make sure that if you do that it will still be turning everything in the right direction, they way they route them has the belt turning things in different directions and if you just skip one it can change the way others turn, check and make sure before you do it, they also make an ac delete bracket that will mount up instead of the ac compressor to keep things how they are supposed to be also
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Old 01-07-2009, 12:03 PM   #11 (permalink)
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Thank's for all the replies. I never had the A/C hooked up to begin with so I'll just grab a A/C delete belt. I should mention that the early Renix style 4.0's have a different AC pump that mounts with two bolts run front to back, not 4 bolts running top to bottom like the later 4 liters, so for a A/C bypass pulley to work (or the Kilbey kits I've seen) you would have to update the bracket ( I already grabbed one from pick n pull in case I do OBA down the road). Also for future reference, all the major parts places only list the non-A/C belts for 1994 and up Cherokee's, anything earlier than that doesn't have the without A/C option according to them (Napa, Kragen etc.)

Thanks again guys

-Bill
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Old 01-07-2009, 12:04 PM   #12 (permalink)
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Also for Reference here is a link to the belt routing diagram, shows both with and without A/C.
http://i30.photobucket.com/albums/c3...s/PB250013.jpg

-Bill
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Old 01-07-2009, 07:40 PM   #13 (permalink)
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Also for Reference here is a link to the belt routing diagram, shows both with and without A/C.
http://i30.photobucket.com/albums/c3...s/PB250013.jpg

-Bill
Does that picture look funny to anyone else?? Maybe I have had a couple too many beers but that doesnt look like my 4.0 layout ac or not.
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Old 01-07-2009, 09:44 PM   #14 (permalink)
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what would the part # be for the delete bracket? for the later 4- vertical bolt compressor
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Old 01-07-2009, 11:52 PM   #15 (permalink)
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88exo and others. I just discovered that there were multiple routings for different years of the 4.0. I also discovered (through trial and error) that the short A/C delete belt for '94 and up cherokees does not fit early models. The routing directions on the back of the belt showed about four different configurations for the 4.0.
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Old 01-08-2009, 06:08 AM   #16 (permalink)
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A/c air

I know that the old york A/C compressors are the most popular does anyone know if those will bolt up to the 4 liter. Or does someone make a kit to bolt it straight up. Is there another compressor that will work, as in bolt straight up and work as on board air? all helpful input would be great Thank!
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Old 01-09-2009, 12:46 AM   #17 (permalink)
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This must be for the GM V6 motor (or the 2.5 4 cyl?)

Definitely not for any 4.0, renix, OBD1, or 96+ OBD2 style routing configurations.
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