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Can I use one of those air vaccuum pumps they sell on ebay:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2408205131&category=6765
To connect to my air compressor and vaccuum out my R12 system (R234 nipples adapted to compressor) on my 240 sedan '89, add one can ester oil and 3 cans R134 to "retrofit" my A/C from R12 to R134?
All this assuming no major leak and vaccuum/pressure holds... The system has been inoperable for 2 years. Do I REALLY need to replace the dryer?
I live in canada, in the summer we need A/C but it's usually not Texas heat...
I started this last year but did not know I needed to pull the vaccuum... by that time the extreme summer heat was over...
Thanks,
Greg Mustang.
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