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2025 C2 of the Year ('64-'66) Finalist - Unmodified
2025 C5 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2023 C5 of the Year Finalist - Unmodified
2022 C2 of the Year Finalist - Unmodified
2021 C5 of the Year Finalist - Unmodified
St. Jude Donor '25
2000 AC low side/ high side pressures?
Looking for info regarding the AC low side/high side pressure readings. I have this chart from my factory service manual, but I'd like confirmation that these are correct. They seem a bit on the low side.
Looking for info regarding the AC low side/high side pressure readings. I have this chart from my factory service manual, but I'd like confirmation that these are correct. They seem a bit on the low side.
perhaps it would be easier to state your problem with some background ....
Looking for info regarding the AC low side/high side pressure readings. I have this chart from my factory service manual, but I'd like confirmation that these are correct. They seem a bit on the low side.
Yes, those are your low and high side pressures based on temp, humidity and at 1000 RPM…AC work is best left to a professional shop.
As a point of reference, the nominal setting of the purple control valve located in the rear casting of the OEM V7 compressor is 41 psia (about 26 psig). This is the low side internal pressure that the compressor will try to maintain by varying its displacement and pumping capacity. The low side service port on the C5 is upstream just after the accumulator/dehydrator. The pressure at this location has to be greater than the control valve pressure setting because there is pressure drop as the low side gas flows from the accumulator to the suction side of the compressor.
In my opinion, the low side pressures in the table are low and would result in an evaporator temperature below freezing. I don’t know if it is a generic table that may be found in multiple GM service manuals or if it was created specifically for the C5.
2000 AC low side/ high side pressures?
