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08-10-2017, 04:05 AM
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#1 |
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Registered User
Join Date: Jul 2017
Location: Dripping Springs
Posts: 40
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71 c10 ac questions
So I have been in the process of completely redoing the ac on my 71 C10, and I have a few questions. The first, which I am working on right now, is what the hell is this thing?? It seems to be a low pressure switch? I'm not sure but I haven't replaced it because I don't know what it is or does, and needed some help. Also, I have been trying to blow through the system with air and it is getting blocked somewhere by the evap, I'm thinking that that switch, or the valve in the second picture is closed and not letting anything through. Any help would be appreciated. Thank you.
   1st Pic 2nd Pic 3rd Pic Last edited by 71C10Guy; 08-10-2017 at 12:43 PM. |
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08-10-2017, 06:03 AM
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#2 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: 71 c10 ac questions
I can't see your pictures. If I could I would help.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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08-10-2017, 12:35 PM
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#3 |
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Registered User
Join Date: Jul 2017
Location: Dripping Springs
Posts: 40
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Re: 71 c10 ac questions
One other question, where is the expansion valve / orifice tube located on the stock ac setup for a 4 seasons AC? Thanks!
And I will try to get those pictures up, I linked them to imigur, so maybe that's not right? |
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08-10-2017, 02:15 PM
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#4 | |
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Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 71 c10 ac questions
Quote:
http://67-72chevytrucks.com/vboard/s....php?p=5781194 http://www.mediafire.com/download/?40ne0nab4bgyqyf
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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08-10-2017, 03:47 PM
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#5 | |
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Registered User
Join Date: Jul 2017
Location: Dripping Springs
Posts: 40
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Re: 71 c10 ac questions
Quote:
One other thing though, and keep in mind I did this with the old expansion valve and the same pressure regulator valve, I blew air through the evaporator core, and it seemed to be blocked. I'm not sure if the expansion valve or the pressure regulator might be blocked or have a valve that is blocking the air, or if my evap is just junked. Thanks! |
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08-14-2017, 03:26 PM
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#6 |
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Registered User
Join Date: Jul 2017
Location: Dripping Springs
Posts: 40
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Re: 71 c10 ac questions
Alright guys, well after replacing everything (almost) and running both vacuum and pressure tests, I have concluded that my system still sucks. First off was a leaky valve, which I replaced, and not the condenser core has a giant hole in the side, so I'm going to have to get a new one. It would be a lot better if the one I got from Vintage Air actually fit tho haha.
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08-15-2017, 06:58 AM
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#7 |
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Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: 71 c10 ac questions
Here is the post I did when I rebuilt my A/C. I hope it helps you out.
http://67-72chevytrucks.com/vboard/s...al+mass&page=2
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1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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| a/c, air conditioning, rebuild |
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