Looking to fix my AC
Hello All, I have an 86 with factory air that the PO tossed the hoses and pump when the LS swap was butchered in. what can I do do get this working again that somewhat thrifty.. trying to stay under $500ish
I was thinking new factory parts; A 1994 pump that's already setup for serpentine belt and a high mount bracket from Ebay . AC unit hose adapters to the original lines?? I know I'll need a pressure switch to work my electric fans, not sure how this works. I will not be using the ECM to control the AC. I need to run this off the factory wiring. https://www.rockauto.com/en/moreinfo...17507&jsn=1024 Any help or direction would be great. |
Re: Looking to fix my AC
Although they will probably work, I don't recommend adaptors for the hoses. Just another place for a leak to develop. Have all new hoses made up to fit properly.
There are two approaches for fan operation in conjunction with an AC system.. One is to use the compressor signal wire to also engage a relay for the fan.. This method cycles the fan along with the compressor regardless of freon pressure.. A better method is to install a pressure switch in the high pressure freon line between the compressor and condenser.. Set the switch to close when freon pressure exceeds about 200 - 225 lbs. At highway speeds the air moving across the condenser will maintain freon pressure below the switch setting, and the fan will remain off. |
Re: Looking to fix my AC
Thanks, that's makes sense and my fans are relayed.
Is the 94 AC unit the correct style or is there a better way to get a serpentine pulley on an AC unit that is plug and play with my lines? |
Re: Looking to fix my AC
I think I saw an sensor adapter that stacks on top of the high side schrader valve..
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Re: Looking to fix my AC
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Looking on rock auto, I can get an 89 AC compressor and dryer ect plus the hoses for a reasonable price. It has the 6 rib pancake style compressor does anyone know if this will all bolt together?
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Re: Looking to fix my AC
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Norville, I'm doing a similar swap as you, but in an '89 c1500. Also using the R4 compressor and stock wiring. I'm using an ebay purchased mount to put the compressor in the same position as the stock '89 unit so that the stock (but new) lines can be utilized. Make sure you flush your system thoroughly before recharging, and replace all the o-rings. The kit you showed should provide you with all that you need.
Several years ago, I put an LS into an '80 C10 and used the stock , down low, LS AC compressor. I used Tejas Steelworks mounts to move the engine far enough forward to use the compressor without having to cut the frame for fitment, but it also required custom hoses and manifold. |
Re: Looking to fix my AC
Thank you all, this is what I was looking for.
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Re: Looking to fix my AC
or get a factory LS compressor, it actually will bolt it on and not look out of place and get 2 simple lines made to fit.... or not..
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Re: Looking to fix my AC
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I didnt think the stock unit would fit in my frame. I don't have one here to try but multiple posts say it will not without cutting my frame.
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The l83 was tighter than LS and with my experiences i made it fit with plenty of room, even welded the notch back up |
Re: Looking to fix my AC
It's up and running I did have to get a different hose set as my condenser fitting is a male unit and the one I posted above is for a female. I think I ended up with hoses for a mid 90's truck . It's not ideal but is working for now.
I'm using a trinanry switch to work the high/low pressure switch and the fans. |
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Re: Looking to fix my AC
I got it off Amazon, I think its the same switch from vintage air SW 4085C A/C trinary switch. it was $15
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