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AC question

 
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98ss
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2011 Chevrolet Silverado


PostPosted: Fri Jun 24, 2016 11:22 am    Post subject:  AC question Reply with quote

AC hasn't worked all summer. I finally bought some gauges after I threw another can in there. I get 25-26 pounds on the low side and 55-60 on the high side. Anyone have readings for me to compare against.
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bigdog60
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PostPosted: Fri Jun 24, 2016 9:47 pm    Post subject:   Reply with quote

Takes 2.3 pounds to fill an empty system...(Impala)

At 75-85 F Humidity 50%

Low Side 27-38 psi

High Side 190- 229 psi

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98ss
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PostPosted: Sat Jun 25, 2016 12:01 pm    Post subject:   Reply with quote

Thanks. I must have a leak that I cannot see at this point. I put 12 oz in last week and 12 in yesterday. I go the system to 26 low side 150 high side. Looks like I can get one of those small cans with dye in it.
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Frank
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PostPosted: Sat Jun 25, 2016 1:17 pm    Post subject:   Reply with quote

I always take soapy water and spray it on the high and low ports after disconnecting the hoses as the valves can stick open slightly. After refrigerant leaks out, shops will always say that the system held a vacuum for several hours when empty (with the service hoses connected being the key point), implying that their did their jobs of making sure the system was leak free. Blow the ports out with compressed air once you ensure they aren't leaking and put the caps back on and you can at least eliminate that common point of leakage.

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98ss
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2002 Chevrolet Impala
2011 Chevrolet Silverado


PostPosted: Sat Jun 25, 2016 7:43 pm    Post subject:   Reply with quote

Just an update. I put some of R134a with dye in. The ground for the ABS unit wore a pin size hole in the high pressure line. The updated part has a piece of rubber in this area. For now I have put a piece of fuel line with a hose clamp over the area. I checked it with soapy water and looks to be holding. I am going to order the updated part which comes with a new high side valve, orifice tube, orings ect.. And Frank, the high side valve stuck open for a bit so good call on that one.\

A couple days ago I saw a thread on here about a throttle cable wearing a hole in the AC line. I can't help but wonder if the black wire might have been mistaken for a throttle cable.
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Frank
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PostPosted: Sat Jun 25, 2016 11:58 pm    Post subject:   Reply with quote

Cool, glad you got it figured out!

The post about the transmission cable rubbing against the AC line was in the 2006-2013 section. Wink

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