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Few questions.

agatch on Mon June 08, 2009 10:08 PM User is offlineView users profile

Year: 1993
Make: Saturn
Model: SL2
Engine Size: 1.9L
Refrigerant Type: 134a
Ambient Temp: ~80
Pressure Low: 0
Pressure High: 0
Country of Origin: United States

How can I tell if the PAG oil I have is DEC, or is it going to say so on the bottle? I'm using PAG-100 with UV Dye, Synthetic, that they sell a autozone.

I have flushed the system, and I think I did it well, but I imagine there is a little oil left in the compressor. Will the CFCs from the Mineral oil react with the PAG badly if it's just a small bit? What's the minimum amount that PAG encounters that will cause acidity/reactivity? Or does the CFC get sucked out in a proper evacuation?

Thanks!

Edited: Mon June 08, 2009 at 10:15 PM by agatch

Chick on Mon June 08, 2009 10:14 PM User is offlineView users profile

If you are retrofitting, I suggest using a "good" quality Ester like BVA auto 100 Cfc and HCFC are refrigerants, not oil, but ester will tolerate residual mineral oil better than PAG's.. But to answer your question, double end capped oil will say so on the bottle.. Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

agatch on Mon June 08, 2009 10:19 PM User is offlineView users profile

I know CFC and HFC are refrigerants, but I've been reading up on retrofits for a few weeks, and I've repeatedly come across http://www.autofrost.com/hotshot/index.html as saying it creates a reaction to the oil, thus my questions. I also know the regular PAG reacts with water in the system and creates an acid. How long does it take the acid to effect things? Like if I had PAG in my system for a week and the dryer I got last week didn't fit, would it be something to worry about needing to replace things? Or would I be alright to just reflush and reoil?

As for DEC PAG, thanks, I was afraid of as much :/.
I asked about DEC PAG and got the dreaded blank stare at autozone. Then they handed me the synthetic bottle of PAG.

Edited: Mon June 08, 2009 at 10:20 PM by agatch

Chick on Mon June 08, 2009 10:34 PM User is offlineView users profile

Your post stated R134a, no autofrost or hotshot.. Can't help you there, as most AC techs (including me) believe there are two refrigerants for MV use, R12 and R134a.. sorry...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

agatch on Mon June 08, 2009 10:44 PM User is offlineView users profile

Yes, I'm going to use 134a, not hotshot. I was just afraid of the left over stuff in the mineral oil, if any.

There's no way I'd use anything other then R-12, or 134a; I however am not willing to wait for more R-12 if I make any mistakes in my daily driver. Which is also why all the seemingly inane questions, I don't want to mess this up!

Thanks for your answers.

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