Jeep Cherokee
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Why can you not get any R-134 into the AC of a 1988 Jeep Cherokee even though youn are using the proper adapters after having the R-12 evacuated?

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Wiki User
2011-09-13 22:39:09

You need to have a vacuum inside your system before it will

accept any R-134a. Your local shop should be able to do this for a

small fee. YOU CANT ADD IT IF YOU DO NOT CHANGE THE OIL. The oil in

134a is different then the oil in r12. If you do use it as a

replacement with out changing the oil the oil will thicken up and

clogg your metering divice. but you can by a retro kit first


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