A/C service ports for a 90GC.

Shirako · #1 06-15-2006, 10:23 PM

Can anyone tell me where the low side port is and the high side port is, I am an idiot when it comes to A/C systems, and im trying to retrofit. =p

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Shirako · #2 06-17-2006, 04:32 PM

No one knows?

Goofy173 · #3 07-05-2006, 05:00 AM

On my 91 3.0 one is right in front over the coolant overflow tank. The other is at the firewall just above the Power Steering dipstick handle. It's been a while since I've connected to them but I believe that the front one is the low side. You'll know if you put a gauge on one with the compressor running.

A much cheaper option than a refit would be to use Freeze 12 or another like product. That's all I use anymore. They can't legally claim it can be used just like R-12 but it can, and I do.