It is not the nature of the York compressors to be noisy. AS for as R134 goes, others have flushed the system and installed R134 and had no problems. I'd certainly replace the dryer. What would you be risking by trying it? I think the new, small compressor is called Sanyo. Available from Cold Air Products in Fort Worth (817 531 2665) as well as other AC places. I know Cold Air has the mounting brackets. I've done it.
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Fordman
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