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Re: A/C leak, help advice. 1 Saabers Like This Post! Posted by Dave The Ice Age Knave [Email] (#2068) [Profile/Gallery] (more from Dave The Ice Age Knave) on Mon, 27 Jul 2020 16:54:06 In Reply to: A/C leak, help advice., bobc [Profile/Gallery] , Mon, 27 Jul 2020 09:28:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I the thought that my 9-5 is running well enters my head, I touch wood - the wood grain dash is fine. For Aero owners, I suggest you keep a block of wood within easy reach.
That said, it's scary for me to provide advice since I real mechanic has already looked at it. What repair was made if any? I would suggest you start by understanding the basics of automotive ac systems if you don't already. I have one 9-5 with inop AC. Have a compressor which will get installed for me. It seems to hold a charge so the compressor is a big suspect. In my own limited experience, UV additives and a black light work. A jeep wrangler was the patient and we could easily see the purple haze coming out of a hole rubbed through a rubber line with the black light. To repair, we replaced the hose and topped up the with R12a propane refrigerant which apparently can be mixed with R134a. Note that you want to tag your system as having R12a since mechanics don't want to evacuate a mixed system if you bring it in later. We did not add oil since we assumed most of the oil was still in the system (scary assumption). We assumed the dryer was still ok (another scary assumption) One can of the R12a refrigerant lasts a year because of a smaller leak(s) somewhere else. Cheap repair and won't burn a hole in your pocket but the propane might. Since we mixed I have one of those one pressure gauge systems you refill through the low pressure port. They are cheap and available everywhere. Get the gauge with the temp compensation built in if you can. On a 9-5 I topped up the system using the same setup with real R134a. Just added about 1/3 can and it rejuvenated a mediocre cooling issue into a real cool dude system. I never try to add too much. Better to test the temp along the way. On a saab variable displacement compressor, it can be a while for the pressure to stabilize. Research all the do's and don't about fixing ac systems and local laws concerning refrigerants before you start. They vary by area/country. You might try snugging up visible connectors as part of the process. From past research, most older cars with gradually failing (warming) AC systems usually just need a small size refill which and by DIY but it's cheap at the local mechanic too. Your system seems to need something else.
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