Author Topic: Replacement Liquid Line between Condenser and Evaporator  (Read 2838 times)

Offline ehjorten

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Replacement Liquid Line between Condenser and Evaporator
« on: June 26, 2018, 01:33:29 PM »
Since nobody makes a replacement line besides the Suburban one with the Rear A/C port, I decided to make up my own!  I found that Vintage Air sells their "U-Bend-Em" line of straight tubes with the proper swaged o-ring ends on them.  I ordered some to recreate my stock liquid line that was crusty and damaged and also did not fit to the replacement "stock" condenser.

Here is my mock-up:


Any tips for successfully brazing 0.049" wall aluminum tube?!  I keep blowing a hole through my trial sections of tube with my MAP-gas torch!  I do get it brazed, but a hole in your line isn't going to work very well!
« Last Edit: June 27, 2018, 02:03:54 PM by ehjorten »
-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

Offline ehjorten

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #1 on: July 02, 2018, 08:47:38 AM »
Broke down and got my liquid line TIG welded.  Pressurized it and submerged underwater to ensure it was air-tight before installing.

Here is the old and the new!



And here is the new line installed on the truck!

« Last Edit: July 02, 2018, 02:44:43 PM by ehjorten »
-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

Offline bd

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #2 on: July 02, 2018, 09:47:46 AM »
Pics aren't displaying.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline ehjorten

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #3 on: July 02, 2018, 11:03:22 AM »
How about now BD?  I forgot to put those pictures in my shared album.
-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

Offline bd

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #4 on: July 02, 2018, 11:14:40 AM »
Perfect.  Looks sharp!
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline ehjorten

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #5 on: July 02, 2018, 12:12:38 PM »
copied the wrong install picture.  Fixed!
-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

Offline bd

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #6 on: July 02, 2018, 02:17:18 PM »
The "Fixed" pic is not displaying.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline ehjorten

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #7 on: July 02, 2018, 02:43:27 PM »
Argh...technology!  ;D
-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

Offline topp

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #8 on: July 05, 2018, 06:57:46 PM »
Rock auto sells them I think, but good job on those

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'90 Suburban TBI 350

Offline ehjorten

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Re: Replacement Liquid Line between Condenser and Evaporator
« Reply #9 on: July 06, 2018, 08:30:18 AM »
AC Delco only makes the Suburban one with the extra Rear A/C Port.  The one without Rear A/C is disco'ed and not even VPI has stock.  There are some Rear A/C Block off kits that give you a machined slug of aluminum, an o-ring, and a nut to block off the rear port, but I wanted something that didn't have that extra port.  I have also found that for whatever reason, be it a combination of OE and Aftermarket parts, but my original line did not align with my new condenser at all!

I didn't take the AC Delco 15568999 out of it's packaging from RockAuto to see if it fit or not, as I wanted to be able to freely return it.  AC Delco 15568998 is the one without the Rear A/C port, but it is no longer available.
« Last Edit: July 06, 2018, 08:32:23 AM by ehjorten »
-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