Removing all the old oil is the key,, - Saab 9000 Bulletin Board - Saabnet.com
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Removing all the old oil is the key,,
Posted by KeithR (more from KeithR) on Sat, 13 Jul 2002 11:30:11
In Reply to: Re: Walmart AC Conversion kits, nowers 92-9KT, Sat, 13 Jul 2002 11:05:12
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Any R-12 type oil remaining will seriously impare the performance of R-134A. All the lines and condesor and evaporator need flushing. The compressor can be drained and flushed with R-134A. At a minimum you will need a vacume pump, and a set of gauges is highly recommended.
There is a good thread from a month or so ago on different ideas for flushing.A pump up garden sprayer was used with mineral spirts for solvent. I have a A/C flush kit ($60) and use A/C solvent ($24 per gallon) as it evaporates quicker.
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