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If you mean changing from R-12 freon to R-134, you don't. R-134 uses a different kind of oil and if you put that oil into your present A/C system it will eat through the seals, destroying the pump and everything. Sorry. I really dont think that is the case. Retrofit kits are available to convert to r134 and new O rings are part of it. Compressor oil is compressor oil, just because the refrigerant is different does not mean the oil is. The new refrigerant actually has poorer cooling abilities than r12 but is better for the environment.

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Q: How do you retrofit and charge the air conditioning system of a 1993 Honda Accord EX 4cyl auto.?
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If it hasn't been converted to R-134 if will have to be


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No, they're different chemicals with different properties. A car with an air conditioning system designed for R-12 needs a retrofit in order to be able to use R-134a.


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It is easier to build accessibility into the design rather than having to retrofit a solution. He tried to retrofit a fuel injection system into his old Mercedes. The retrofit using new lenses effectively repaired the Hubble Telescope.


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Because a complete retrofit is a very expensive process, and someone driving a car old enough, for example, to have an R-12 system may not necessarily wish to spend that kind of money on such an old vehicle. Additionally, most customers would come in under the impression that a "magic bullet" exists which would allow them to to cheaply retrofit the system, when in fact there is no such thing.


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