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R-134 conversion using BVA 100

wm8728 on Tue June 02, 2009 3:26 PM User is offline

Year: 1992
Make: Acura
Model: Vigor
Engine Size: 2.5L
Refrigerant Type: R-12


I belong to a discussion forum - Yahoo Group, really - that specializes in 92-94 Acura Vigors. The worst part of the AC on these cars is the Evap/heater core chest. You have to pull the entire dash to get this chest out, but it is a must when replacing a blower motor or getting the evap and TXV removed.

At any rate, many wish to convert their R-12 systems to R-134. Being the resident AC guru in that forum , I have been preaching that the only successful R-134 conversion involves evap/TXV removal and flush as well as a new comnpressor or one in which it has been thoroughly flushed and filled with PAG oil. Then I started reading about the BVA 100 Easter glow and its supposed compatibility with mineral oil. SO... if one were to flush the compressor, condensor, drier, and lines (can't flush the evap with the TXV still attached, no?), is it safe to fill the compressor with BVA 100, put it all back together, and charge with R-134? Will the trace amounts of mineral oil in the evap/TXV cause any problems?

If not, this would be a major breakthrough as far as our group is concerned. Some have simply been drawing down a vacuum and running with R-134 with NO flushing . I tell them "Come back in a year and let us know how that worked out for you" .

Thanks to all,
Biker Bil

bohica2xo on Tue June 02, 2009 3:32 PM User is offline

I guess the first question is:

Why would you convert that car to 134a in the first place?

BVA is good stuff. I prefer to use it in 134a systems over PAG for several reasons. One of the reasons we stress flushing is to avoid ao oil overcharge which really hurts system performance.


"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

Chick on Tue June 02, 2009 4:07 PM User is offlineView users profile

I use only BVA auto 100 in retrofits, and have used it in several new, flushed R134a applications. Works great. Like Bohica said, on factory R134a systems, it's best to have the system totally flushed before using BVA. I don't like to mix oils, so if a job comes in and it's not flushed, the proper amount of PAG is used, depending on what was changed..

Email: Chick


Freedoms just another word for nothing left to lose

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