Coleboy Posted January 28, 2014 Share Posted January 28, 2014 (edited) Guys, went to regas/service the aircon today, cant find any info on the car as to the amount of gas needed. Cheers as ever Cole Edited January 28, 2014 by Coleboy (see edit history) Quote Link to comment Share on other sites More sharing options...
Coleboy Posted January 28, 2014 Author Share Posted January 28, 2014 Found it, 750 G in case it helps anyone........ Quote Link to comment Share on other sites More sharing options...
Tayfun.tugra Posted January 28, 2014 Share Posted January 28, 2014 Thanks, Was hoping to do this next month. Now I know Quote Link to comment Share on other sites More sharing options...
Coleboy Posted January 28, 2014 Author Share Posted January 28, 2014 No Problem at all, thank this forum, found the info on here:) Quote Link to comment Share on other sites More sharing options...
rider Posted January 28, 2014 Share Posted January 28, 2014 The best way to charge is by suction pressure when the compressor is running. You'll find a poorly charged system will pull a vacuum on the suction side of the compressor. Simply charging gas until 10psi positive pressure on the suction side will have the system working well. You will then see a stable liquid stream through the refrigerant sight glass (instead of liquids and lots of bubbles or just gas and no liquid) at 2000rpm engine speed. This way you can avoid having to purge the air con to then measure in the specified amount. The purging part requires very expensive recovery equipment so is auto shop territory. Its an easy job to do yourself. The pressure gauges, R134a refrigerant cylinders and R134a quick release couplings are easily purchased from refrigeration service supplies wholesalers or from places like E-Bay. One 10kg cylinder should last for 15 years of normal use top offs to keep the system charged and running as it should. I personally wouldn't bother with the top up canisters. Quote Link to comment Share on other sites More sharing options...
rider Posted January 28, 2014 Share Posted January 28, 2014 For anyone wanting to air con service their Supra or any other family car then this site gives all the gas and oil weights by vehicle by year. It should be noted that additional oil is only required if the system has experienced a leak and not when simply topping up. Excessive PAG oil will reduce the cooling efficiency in the evaporator though oil starvation will shag your compressor. http://www.techchoiceparts.com/refrigerant-and-oil-capacities/qrst Quote Link to comment Share on other sites More sharing options...
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