Author Topic: Question on high pressure serivce port fitting  (Read 1775 times)

Offline ken4444

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Question on high pressure serivce port fitting
« on: May 31, 2018, 08:56:36 PM »
See the pic below of my high pressure service port fitting.  I honestly don't know what year this is from, but it could be from a 1988 Suburban which is where my C10 drive train and interior parts came from.

1) I believe this is an older R12 service port.  The 134a hose fittings are too large.  Is that correct?
2) I assume this particular port is NOT removable?  It has no hex fittings, but I have not tried to unscrew it.
3) Can anyone point me to the correct replacement part (maybe the metal whole line) with a 134a service port?  This tube runs between the bottom of the evaporator and the condenser.  It's very roughly "U" shaped and maybe 2 feet long if you straightened it out.

I need to replace the orifice tube and thought I should replace this part with a 134a part since I'll have one end disconnected anyhow.


Offline ken4444

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Re: Question on high pressure serivce port fitting
« Reply #1 on: May 31, 2018, 09:19:32 PM »
Well after a few more minutes of poking around I found this:

"ACDELCO 1533072 A/C Refrigerant Hose"

https://www.rockauto.com/en/catalog/chevrolet,1988,v20+suburban,7.4l+454cid+v8,1408711,heat+&+air+conditioning,a/c+refrigerant+hose,6900

Based on other photos of the same part, it's the same R12 service port.  So I may be out of luck in trying to find a 134a version of this part.  Probably it doesn't matter, or I can get an adapter to convert the port to a 134a size fitting.

Offline VileZambonie

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Re: Question on high pressure serivce port fitting
« Reply #2 on: June 01, 2018, 05:28:40 AM »
R134A Retrofit fittings are about $12 bucks for a pair with service caps from your auto parts stores.

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Offline ehjorten

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Re: Question on high pressure serivce port fitting
« Reply #3 on: June 01, 2018, 08:40:01 AM »
As Vile said...you don't find a hose with R134a fittings, you get adapter fittings to go from your R12 to R134a.
-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6