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AC question

aquilaone

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July 18, 2012
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City, State
okc
Year, Model & Trim Level
1992 Explorer
I am trying to fix the AC in my 1992 explorer. It had been converted from R12 to 134. Can I use a compressor from a 1999 explorer? what model years is the AC compressor compatible with my '92?

Thanks for your help
 
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EF YEAH!!
Elite Explorer
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November 6, 2000
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2018 EX Sport Concept
The 91-92 and some 93-94 Explorers came with the smaller FX-15 A/C compressor for R-12 systems, since R12 doesn't need very high pressures. The later 93-94 Explorers came with the larger FS10 compressor, which was more robust and better for the higher pressures of R-134a.

You should be able to use an FS10 compressor from just about any 93 to 2001 Explorer with the 4.0L OHV engine and it should be a direct swap. The FS10 compressor will of course be larger, but the pulley should line up with the serpentine belt.

If the A/C hoses were never replaced, you can buy the aftermarket hoses for the 91-93 Explorer and they will be the newer "barrier" type hoses designed for R-134a. R-134a molecules are smaller than R-12 molecules, so using R-12 hoses allows the refrigerant to escape through the hose walls.

You should also add a new accumulator/receiver drier, with either a variable orifice tube or the R-134a specific tube, and an R-134a pressure switch. These items are relatively inexpensive but make a big difference in terms of having a whole setup for R-134a compared to just sticking R-134a into a system that is made for R-12.
 
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