Thread: A/C prob
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Old 08-13-2019, 04:35 PM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
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2003 L-Series 3.0L Sedan
Default Re: A/C prob

The rear line to the compressor is the low side suction hose. You can replace it with new, used or use the original line if its not damaged. A flat seal needs to be replaced. Examine this line carefully. Did it leak, leaving dye and oil marks or not? Usually when damage occurs to vehicle ac systems in Saturns, invisible refrigerant (always under pressure) simply leaves from any pinhole, crack or loosened fitting. Once a leak begins to release pressurized refrigerant, dye mixed in with oil leaves to leave visible markers. Elusive leaks are found using a uv light to make dye glow in the dark after sunset or dark garage.

If you expect cold air, either perform your own repairs or pay someone to do it right. no matter who does repairs, every system that's opened must be evacuated of any remaining refrigerant, air and moisture. Simply tightening the fitting then refilling is not considered a repair even if it works because no one can guarantee how long this works. As mentioned many times, ac repairs are unforgiving of mistakes.

The only way to ensure a repair is correct is after any repairs are made, evacuating a system then final leak check is performed before refilling with refrigerant. Once refilled, the system is restored to factory condition and should remain under pressure until unanticipated circumstances occur to allow another leak. There's no guessing with ac repairs. Either it's repaired correctly or not. The rear hose must be disconnected and examined for damage to both hose end and compressor port. Any wear that interferes with the flat seal preventing a pressure proof seal will simply allow refrigerant, oil and dye to leak out, wasting any efforts, time, money and parts to poor repair methods. The compressor port and hose end must be clean and free of corrosion of mating surfaces to allow the flat seal its role in sealing the connection. The flat seal is basically a soft steel outer ring clamping an O-ring. It's never reused. If reused, it can leak with money thrown away in repair costs. This seal is not lubed and assembled dry with clean surfaces on compressor and hose fitting. Failure to follow procedures as described in service manuals can result in another leak. The target is restoring ac back to factory condition with almost anyone willing to use tools and follow procedures capable of diy repairs. Using gauges and vacuum pump is also within most diy skills otherwise pay a shop to perform this part. Every repair performed by repair shops are negotiable. There are no set costs since parts and labor rates vary.

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