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07-09-2011, 03:11 PM
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#1 | |
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Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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My Valve Expanded.
Where can I get a new Made in USA expansion valve for my '72. I would rather drive in 120* weather with my windows down than to install a chinese/mexican one.
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1966 F250 4X4 416 1972 K20 350 4 OTF Quote:
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07-09-2011, 08:38 PM
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#2 | |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: My Valve Expanded.
Quote:
The problem with THX valves is the system has to be perfectly clean, The smallest peice of debris can hang it open. THX valves are used on all kinds of eqipment all over the world...I doubt a "foreign" made one would cause more problems than a "USA" made one. Your worn/rebuilt A6 compressor is most likely throwing trash into the THX valve. Changing it over to a "Fixed Orifice system" is pretty easy....A 77 Olds 98 evaporator & orifice tube will fit your evaporator case, Use a accumulator for a 77 chevy truck. Get rid of the receiver dryer off the core support. You will need some custom hose work done....The "liquid line" from the condenser to the evaporator will be custom, & the Suction line from the accumulator to the compressor will be custom. Just "rehose" the "discharge" line from the compressor to condenser. |
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07-11-2011, 12:21 AM
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#3 |
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Registered User
Join Date: Jan 2007
Location: Garland,TX
Posts: 431
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Re: My Valve Expanded.
I hope you enjoy that 120 degree heat...
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07-28-2012, 11:43 PM
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#4 |
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Registered User
Join Date: Mar 2011
Location: Brandon,Iowa
Posts: 391
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Re: My Valve Expanded.
I'll be watching this !!
I'm going to change my '72 over to a serpentine setup with the newer style compressor. I plan on keeping it R12. Any tips or pointers are greatly appreciated !! Tom |
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07-29-2012, 12:10 PM
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#5 |
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Senior Member
 
Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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Re: My Valve Expanded.
subscribed!
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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07-29-2012, 05:38 PM
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#6 | |
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Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: My Valve Expanded.
Since this was resurrected, I actually fixed my original expansion valve.
The process went like this: 1.Turn A/C on 2.Open hood 3.Tap on expansion valve with Leatherman 4.Enjoy cool air 5.Repeat steps 1 through 4 every time you drive for 10 or 12 times. Worked like a charm.
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1966 F250 4X4 416 1972 K20 350 4 OTF Quote:
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07-29-2012, 05:47 PM
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#7 | |
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Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: My Valve Expanded.
I was going to have my valve sent in to be rebuilt before it started working.
http://www.classicautoair.com/GM_OEM_Parts_Valves.html
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1966 F250 4X4 416 1972 K20 350 4 OTF Quote:
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