Where is the LOW pressure side to install Refrigerant? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-04-2005, 06:01 PM   #1
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Default Where is the LOW pressure side to install Refrigerant?

The directions on the Refrigerant can read, 'Install on the LOW pressure side only'.
Where is this coupler?

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Old 06-04-2005, 10:45 PM   #2
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IF you went out and got an ac kit from autozone or anywhere like that, the kit should be dummy proof, just tap into the ac line nossle If i remember correctly, then the low preasure side on a car should be after the accumulator drier. And make sure the car is running while you do this, if not you can ruin your ac compressor.
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Old 06-05-2005, 03:22 AM   #3
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If I remember correctly.....Low pressure is the valve right next to the battery.....Closest to the radiator. That'* the valve I used last summer when I recharged my A/C.
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Old 06-07-2005, 06:06 PM   #4
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Default Low pressure port

Quote:
Originally Posted by LakevilleSSEi
If I remember correctly.....Low pressure is the valve right next to the battery.....Closest to the radiator. That'* the valve I used last summer when I recharged my A/C.


My 98 is the opposite, hi side is closest to the battery/radiator, low side further towards the firewall. I just had to replace the AC hose assy last week.
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Old 06-08-2005, 11:52 PM   #5
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The low pressure will also be the larger of the two with fittings.
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Old 06-09-2005, 12:28 AM   #6
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No your wrong, the one closest to the battery is the high side. The low side is closest to the reciever drier, strut tower.

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Originally Posted by LakevilleSSEi
If I remember correctly.....Low pressure is the valve right next to the battery.....Closest to the radiator. That'* the valve I used last summer when I recharged my A/C.
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Old 06-09-2005, 08:34 AM   #7
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The larger of the two lines is always the low side.
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Old 06-09-2005, 01:39 PM   #8
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Yup, the low side on my old 1992 SE, 1994 SLE, 1999 SSEi, and current 1990 SSE is right on the reservoir near the powersteering pump and firewall on the passenger side.
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Old 06-09-2005, 01:58 PM   #9
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I believe the dummy proofing is in the size of the valve where you hook up. It should only hook up to one of them.
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