Automotive Air Conditioning Information Forum (Archives)

Don RRSU on Sat July 17, 2010 5:48 PM

Year: 2003
Make: Chevy
Model: S-10 Pickup
Engine Size: 2.2 L
Refrigerant Type: 134a
Country of Origin: Vanuatu

Could anyone please tell me the function of the adjustable Allen set screw on the ports end of the V7 compressor on my 2003 Chevy s-10 Pickup with a 2.2 L 4 cylinder engine?

Thanks,

Don RRSU

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Don RRSU

GM Tech on Sat July 17, 2010 8:03 PM

Photo please-- never heard of it-- unless it is hang-on air-- certainaly not factory.....

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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......

Don RRSU on Sun July 18, 2010 9:35 AM

GM Tech,
Thanks for the interest. The link to the picture is below. In the picture I've placed a red circle around the allen set screw item.


Don RRSU

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Don RRSU

chris142 on Sun July 18, 2010 11:06 AM

Thats the high pressure reliefe valve. It is designed to vent refrigerant if the head pressures are crazy high. No adjustment for it.

TRB on Sun July 18, 2010 11:17 AM

Agreed it is a relief valve.

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