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Old September 12th, 2020, 21:22
Leakyforlife Leakyforlife is offline
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Ac conversion on 1991

Want to get AC back in my 1991 xj. It came stock with AC but hasn't had it hooked up for years? Possibly. My question is can I just take all the ac stuff out a 97 and newer with the r134a equipment and direct swap it into my 91. I just don't want to deal with finding the old hoses for the 91. I think the only issue I may run into would be wiring, I understand the newer jeeps had a high and low pressure switch.
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Old September 12th, 2020, 21:28
tech1001 tech1001 is offline
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Re: Ac conversion on 1991

I think you can get it to work . it will just take some wiring to get the pressure switches to work and the efan .
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Old September 13th, 2020, 03:41
89Mock 89Mock is online now
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Ac conversion on 1991

Short answer is no unless you include the cooler up front. Check outnickintime in youtube. He did a video on it.
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Old September 13th, 2020, 05:59
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Anak Anak is offline
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Re: Ac conversion on 1991

I don't know what year they switched to 134a, but it was before '97. My '96 came with 134a (with an April of '96 build date).
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Old September 13th, 2020, 12:20
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tjmotter tjmotter is offline
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Re: Ac conversion on 1991

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Originally Posted by Anak View Post
I don't know what year they switched to 134a, but it was before '97. My '96 came with 134a (with an April of '96 build date).

They started the switch 1994. I know because I bought a new '93 and had R12
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Old September 13th, 2020, 12:22
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tjmotter tjmotter is offline
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Re: Ac conversion on 1991

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Originally Posted by Leakyforlife View Post
Want to get AC back in my 1991 xj. It came stock with AC but hasn't had it hooked up for years? Possibly. My question is can I just take all the ac stuff out a 97 and newer with the r134a equipment and direct swap it into my 91. I just don't want to deal with finding the old hoses for the 91. I think the only issue I may run into would be wiring, I understand the newer jeeps had a high and low pressure switch.

I converted my '90 to a '95's system. Took the compressor and hoses out of a junkyard '95 that was in great shape and then bought a new '95 condenser, evaporator, drier and expansion valve. The evaporator required me to do some trimming of the heater box but it will fit. If I had to do it again, I would have used an evaporator from a '90. Works great.
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