Re: High quality refrigerants??

Posted by NC Wayne on July 20, 2005 at 20:15:44 from (205.188.117.66):

In Reply to: High quality refrigerants?? posted by Hurst on July 20, 2005 at 16:39:30:

I'm just getting into working on the mobile A/C systems so all I've got to go on is a little OJT knowledge and alot of "book smarts". Like Bob said you don't want to mix the oils or you'll wind up with a mess. Too the different oils mixing can cause chemical reactions in the system which will eat it up from the inside out. Unless you have a massive leak your probably not gonna see enough oil anywhere to really amount to anything, if you see any at all. So, unless it has a massive leak the system (which you'd need to have the system opened up and fixed for anyway) it should still have a full charge of oil so adding extra, even of the right type, isn't really good for it either. Depending on where the leak is the sealer may or may not do you any good. There is a difference in R12 and 134 that allows 134 to "leak" more through the hoses than the 12 did. Depending on how long it's been since the system was converted that may be where the missing refrigerant went. The new hoses designed for 134 have a "barrier" inside them to prevent or at least drastically reduce the leakage to "acceptable" levels. So, basically the sealer isn't gonna actually gonna harm anything if it's not needed beyond taking up the room that that particular amount of refrigerant could be taking same as any extra oil would do. The dye will mix in and is inert so it's not gonna harm anything in the system either. Just make sure you don't add too much refrigerant to the system because too much refrigerant is just as bad for it as too little. Good luck.

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