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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-10-2007, 08:06 PM   #1
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Default AC Recharging

I learned my car was retrofitted with r-134a in 97 by the previous owner and I wanted to refill it with coolant because it comes out lukecold (if that'* a real term ) but I dont know where the Low end of the ac system is because the repair manuals don't cover AC refill. I wanted to pick up one of those refill cans with the pressure gauge attach, can some of you help. I was wondering if it was where the blue cap is seen in the pic below



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Old 03-11-2007, 01:11 AM   #2
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yep the blue cap is the low end. The 134a charge kits will only attach to the low pressure side, IIRC.

Hope this helps
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Old 03-11-2007, 05:47 AM   #3
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Just a little added info: The AC system is a closed loop system, if it looses it'* charge there is a leak somewhere. It could be as simple as a bad o ring or as costly as a pin hole in the condenser. You could end up wasting your money by continually recharging it.
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Old 03-11-2007, 07:07 AM   #4
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In order for you to use that kit your fittings will need to be R134 size.






I dont know the exact locations for your car but I know the diameters of a R134a car vs a R12 car are different.

follow the lines to the canister.
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Old 03-11-2007, 12:54 PM   #5
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The Blue cap is the low pressure/Suction port... You have the 134a fitting and will be able to use that kit..

I would wait for the weather to warm up a little bit tho..

We will be able to give you a good range to charge to on the low side via the Humidity and Ambient temperatures...

I retrofitted my 91 LE a long time ago... Found the leak to be the valve on the high pressure side... Fixed that issue and got a kit...

Its been almost 7 years on 134a... Still have the original compressor... It rattles a bit but still gets the job done.. Sooner or later I will replace my compressor.. But for the longest time even in 90F heat it would blow cold...

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Old 03-11-2007, 01:29 PM   #6
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Thanks for the help guys
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