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How much R134A needed?

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Old 11-09-2001, 12:14 AM
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adrial
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Post How much R134A needed?

I'm gonna give recharging my AC system a shot...how much R134A do I need?

It was converted several years ago by the 1st owner...
Old 11-09-2001, 12:23 AM
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Tabor
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80% to 85% of the original R12 load.
Old 11-09-2001, 01:24 AM
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Bob S. 1984 Silver
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I've done a few..80% of the R12 number. I can get you an exact figure tomorrow (it's 10:30 PM MST).

Bob S.
Old 11-09-2001, 08:12 AM
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adrial
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Thanks
Old 11-09-2001, 12:24 PM
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How well do the conversion kits work? I just bit the bullet and refilled with R12 ($215, IIRC) because all the A/C guys I talked to said that the conversions don't ever blow quite as cold.

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Wpns Co, 2nd Bn, 24th Marines
Old 11-09-2001, 12:25 PM
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MadMax
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Adrial,
I am almost positive that the stock R-12 amount is 33 oz. It should say what the capacity is inside your hood on the left side just aft of the A/C dryer. There should be a sticker on the fender well. So, 80-85% of 33oz is 26.4-28.05oz.

That sounds about right but I would defer to Bob S. He is an A/C tech and basically the "man" when it comes to A/C. So go with what he tells you.

Regards,
Max
Old 11-09-2001, 12:27 PM
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Tabor
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You can convert quite easily. You need to:

1. Take your compressor out.
2. Drain your compressor of old oil.
3. Install new oil
4. Replace drier with correct R134a unit
5. reinstall compressor
6. Have SHOP vaccum down your system
7. Have SHOP fill with R134a, buying 12oz cans at G.I. Joes will not allow you to measure accurately.
Old 11-10-2001, 06:46 PM
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Don't waste your time with that R134A stuff. Use the R-951. It will make your car much faster, unless you already drive a 951. Don't use the R-928, it is too heavy, and for Heaven's sake don't use the R-911 unless you want to have engine cooling problems.

Thaddeus
Old 11-10-2001, 11:30 PM
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Untier
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some siily goose at the factory put a sticker on mine that says to fill with 33.5 oz r-12.
Old 11-11-2001, 12:02 AM
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Your car must be really old then, because R-12 was only used for the VW prototypes ca. 1938. Weird.

Thaddeus
Old 11-11-2001, 02:32 AM
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I converted my 1983 944 with 24 oz of R-134A and just dumped in the oil conversion. No expansion valve change, no oil purge. It blows as cold as the R-12 did and is still going strong. I would have drained the system, but my compressor leaks anyway.



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