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80 sc York compressor
So i have an 80SC that has been converted to R134 still had the old fittings i put on the new fitting and hooked up one of the cans with the gauge started the car turned the ac on high and i can see the compressor engage but it wont take the freon. Any ideas
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06-20-2019, 01:45 PM
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Fleabit peanut monkey
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Old fittings post conversion to R134? There were R12 fittings on there?
You are filling on the low side? If so, sounds like compressor is not doing it's job.
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1981 911SC Targa |
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06-20-2019, 02:05 PM
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Last edited by lochrie2; 06-20-2019 at 02:24 PM.. |
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06-20-2019, 02:18 PM
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Join Date: Mar 2016
Location: Richmond, VA
Posts: 1,651
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Miles are irrelevant on a nearly 40-year old car. You should assume that every AC hose on the car is dry-rotted and will leak like crazy.
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06-20-2019, 02:46 PM
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39 year young system could have any number of challenges. I'm with Bob re compressor not working... that or there's a blockage somewhere. Assuming system did take refrigerant in, Mock's point of it not enduring due to vintage hoses... am +1 on that.
Believe it's possible to check for blockage by using either a compressor or vacuum pump. Pull a vac on low side or pressurize high side and leave opposite side free to vent and see if there's passage. I've never done this but it seems like it should work. Was vacuum pulled? Also... you're in Oregon. Do you really need AC there?
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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06-20-2019, 04:53 PM
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No i have not pulled vacuum on it. Ive never done that but ill give it a shot. The whole system was gone over when it was converted to r134 but that was 10 yrs ago based on the records i have
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06-20-2019, 06:55 PM
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06-20-2019, 06:59 PM
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A few notes for you re vacuum pulling*... = Elimination of water vapor & air in system. Water vapor within AC system can freeze TX valve. And air doesn't compress like refrigerant does rendering AC useless to one degree or another (if air's in system.) = Vacuum holding steady proves system being airtight. If not airtight, everything else is waste of time & money. (Some propose ALSO testing system under positive pressure.) = Vacuum serves to draw initial charge of refrigerant (liquid) in without compressor being ON. (Liquid charge requires special procedure or it's bye-bye compressor.) This initial charge provides pressure needed to close pressure switch and so allow compressor to run. (Bypassing P-Switch is possible.) Older system may not have PS. In a thread, to diagnose AC issues and how to deal with them... that can be a drawn out process that sometimes goes in circles. Not to put you off, but rather to help you cut to the chase, go-to Porsche AC guy is Charlie Griffiths. My recommendation, and surly I'm not alone in this, is to speak with Charlie---you'll get expert Porsche AC advice on how best to solve your hot-wife challenge. 800.451.7225 * Requires AC manifold gauge system & vacuum pump. .
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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06-21-2019, 07:04 AM
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Problem solved, the compressor valve was closed opened it and it took the r134 no problem...cool air😀
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06-23-2019, 03:24 PM
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911SC
1981 Porsche 911 SC Targa
1974 Carrera
1979 930
1980 SC Targa
