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Old 03-12-2006, 06:25 PM
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Join Date: Oct 2005
Location: Hilliard, OH
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A couple A/C questions

Hi again. I was looking over my A/C system for a possible repair and I have a few questions. First, where is the high side service port? I can't find it to save my life. Second, the bottom of my receiver-dryer is rusted badly and I was wondering if this is common? I am replacing it anyway but I was just kinda curious. Third, the compressor is only on right now with 1 bolt, the upper one on the driver side, does anyone know a source for the other 2 bolts and spacers? Fourth, has anyone successfully converted to R-134A and how did it cool? Thanks.

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Old 03-12-2006, 06:27 PM
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Join Date: Oct 2004
Location: Loganville/Atlanta
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Check out this to your A/C questions.

http://dieselgiant.com/repairyourac.htm

Dont use 134a unless you want to replace the compressor very soon! Either use the original R-12 or Freeze 12. The pressures are much lower and move the oil through the system much better. The oil required with 134a is very hydroscopic and absorbs moisture like a sponge, very bad.

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1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
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