Automotive Air Conditioning Information Forum (Archives)

Sellncars on Thu June 21, 2012 6:52 PM

Year: 1997
Make: GMC
Model: Sierra K1500
Engine Size: 5.7L
Refrigerant Type: R143a
Ambient Temp: 92
Pressure Low: 35
Pressure High: 230
Country of Origin: United States

1997 GMC Sierra K1500 Pickup truck. Replaced the Accumulator and the hose assembly due to leaks, Added Pag 150 oil 3.5 Oz to the accumulator before install. Added 1/4 OZ of dye after parts replacement and 32 Oz of R134a. No leaks are present. Is it normal for low pressure side hose to be cold and the high pressure side to be hot? Condenser was sprayed / cleaned with the hose and behind it and the radiator was also cleaned of any debris, which there wasn't much besides a few bugs. Clutch Fan was replaced 4 years ago. Is this as cold as this truck is going to get now?, seemed colder before the leaks occurred.

With fan on low setting center vent temp was 44 at idle and on high setting is was 49, at 1500 RPMS is got down to 36 degrees.

Idle
Low Side: 35
High Side: 230
Ambient: 92 Degrees


At 1500 RPM'S Gauge cycles

Low Side: 20-45

High Side: 155-230

Edited: Thu June 21, 2012 at 6:56 PM by Sellncars

GM Tech on Thu June 21, 2012 7:44 PM

And you are complaining???? 44 then 36 is pretty darn good at 92 degf ambient-- that is better than normal for a truck...

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Sellncars on Thu June 21, 2012 8:29 PM

Quote
Originally posted by: GM Tech
And you are complaining???? 44 then 36 is pretty darn good at 92 degf ambient-- that is better than normal for a truck...

Ya i know, maybe i should just by a large walk in beer cooler and build it street legal....I hate the heat....lol

bueller on Fri June 22, 2012 2:03 PM

Quote
Originally posted by: Sellncars
Quote
Originally posted by: GM Tech
And you are complaining???? 44 then 36 is pretty darn good at 92 degf ambient-- that is better than normal for a truck...



Ya i know, maybe i should just by a large walk in beer cooler and build it street legal....I hate the heat....lol

I call shotgun!!!!!!!