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Old 08-12-2013, 12:23 PM
1project2many 1project2many is offline
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Join Date: Jan 2013
Location: Lakes Region, NH
Posts: 179
That's pretty bad. I wonder how long it's been since the last recharge? That "black death" is almost always the result of moisture in the system. R134A plus H20 yields HF , Hydroflouric acid. HF is highly reactive, to the point that it will etch glass and cause stainless steel to "bubble and foam." Older systems built for R12 frequently use dissimilar metals which only aggravates the problem. For many years I worked on R4's in R12 equipped vehicles and they typically didn't produce the same quantities of black garbage when they failed.
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