AutoZone had a red dye that didnot require a u/v light. I wouldn't do that one for fear of it getting into carpets..... I, too, am curious. I still haven't located my a/c "pressure release" system. :) -----Original Message----- From: Walter Coe [mailto:Whalt@xxxx] Sent: Monday, June 24, 2002 8:23 AM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] a/c leak? I have read DML postings where people explain that they put leak detector dye in the a/c system and then find leaks all over the rubber hoses running along the chassis. I understand that anywhere there is a refrigerant leak, there will also be an oil residue present. QUESTION #1: So if the entire length of the hose becomes porous enough to be a leak, wouldn't the hose also appear oily looking? I'm getting ready to rebuild my compressor and replace the dryer & expansion orifice, so I don't want to waste R-12 in a system that won't keep it. QUESTION #2 Speaking of dyes to find leaks in the a/c system, can anyone say how long these work before they break down? I heard a rumor that they have a short useful life once put in the system. I am familiar with the variety of dye that needs to be illuminated with an ultraviolet light to become visible. QUESTION #3 Is there another variety of dye that is visible without a UV light? Thanks, Walt Tampa, FL To address comments privately to the moderating team, please address: moderator@xxxx To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/