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Converting 1994 B350 AC from r12 to r135a

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Old Aug 7, 2020 | 01:14 PM
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Originally Posted by ol' grouch
Your high pressure port is usually on the line. That is a plug for internal repair and assembly.That compressor looks rather iffy to me. I replaced the one on my Escalade last year with one off Fleabay and it wasn't much for a kit with a new compressor, orifice tube and receiver/dryer. If you're going to this much effort, I'd go all the way and do it right. After flushing, your old condensor and expansion coils and such will work fine with R-134. I bought a '93 Dakota in '93 and they said if it needed a/c repair, they would convert it to R-134 as a matter of course.
Ok, thanks. My only concern is swapping parts with the engine in. Can I remove and replace the compressor, orifice tube and receiver/driver somewhat easily with the engine in? The engine should go in today and tomorrow, so I can't get parts in time and will have to do this myself later.

Just ordered
this this
kit on Amazon.
 

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Old Aug 7, 2020 | 01:38 PM
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Yeah, shouldn't be too much of a problem. With the doghouse off, you will have easy access to pretty much everything. May have to move some of the air intake stuff out of the way for the stuff on the front.
 
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Old Aug 7, 2020 | 02:06 PM
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Can anyone help me find the right replacement for the AC Suction and Liquid Line Hose Assembly or AC Manifold Hose Assembly. Mine is all rusty but I can't find a confirmed replacement. Looks similar to this:
 
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Old Aug 7, 2020 | 02:07 PM
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Originally Posted by HeyYou
Yeah, shouldn't be too much of a problem. With the doghouse off, you will have easy access to pretty much everything. May have to move some of the air intake stuff out of the way for the stuff on the front.
Awesome. I'll get proper parts and do it after the engine's in. Thanks!
 
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Old Aug 8, 2020 | 12:12 AM
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Wishing a great weekend to everyone! Thanks for your help!
 
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Old Aug 8, 2020 | 03:10 PM
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Originally Posted by ian94b250
Ok, thanks. My only concern is swapping parts with the engine in. Can I remove and replace the compressor, orifice tube and receiver/driver somewhat easily with the engine in? The engine should go in today and tomorrow, so I can't get parts in time and will have to do this myself later.

Just ordered this kit on Amazon.

If you're removing the radiator support to put the engine in from the front, that will be fairly easy. Just replace the dryer and everything else before you put the support and condening coil back in and it should be fairly straight forward. Granted, I don't recall replacing the engine on a later van but I did on a couple of the early models from the 60's. The Dodge A series and a Ford version. Both had the engine between the seats.
 
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Old Aug 9, 2020 | 01:36 AM
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Originally Posted by ol' grouch
If you're removing the radiator support to put the engine in from the front, that will be fairly easy. Just replace the dryer and everything else before you put the support and condening coil back in and it should be fairly straight forward. Granted, I don't recall replacing the engine on a later van but I did on a couple of the early models from the 60's. The Dodge A series and a Ford version. Both had the engine between the seats.
Ah, thanks for the tips. Unfortunately, parts won't arrive in time, so the van will be put back together. Hope it's still doable. I'm still stumped on finding a replacement refrigerant hose. Amazon says this one fits, but other websites say it doesn't. Seems to fit a mid-90s Dodge Neon...
https://www.amazon.com/Four-Seasons-56275-Hose-Assembly/dp/B000UODUXA/ref=sr_1_1?_encoding=UTF8&dchild=1&qid=1596950886&s=automotive&sr=1-1&vehicle=1994-40-2750-20--46--7-4773-22-8-2-1767-52-6&vehicleName=1994+Dodge+B350 https://www.amazon.com/Four-Seasons-56275-Hose-Assembly/dp/B000UODUXA/ref=sr_1_1?_encoding=UTF8&dchild=1&qid=1596950886&s=automotive&sr=1-1&vehicle=1994-40-2750-20--46--7-4773-22-8-2-1767-52-6&vehicleName=1994+Dodge+B350
Mine is super rusty, but I don't think it had any leaks, so maybe just leave it, but it's ugly haha
 
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Old Aug 9, 2020 | 11:52 AM
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Originally Posted by ian94b250
Ah, thanks for the tips. Unfortunately, parts won't arrive in time, so the van will be put back together. Hope it's still doable. I'm still stumped on finding a replacement refrigerant hose. Amazon says this one fits, but other websites say it doesn't. Seems to fit a mid-90s Dodge Neon... https://www.amazon.com/Four-Seasons-...994+Dodge+B350 Mine is super rusty, but I don't think it had any leaks, so maybe just leave it, but it's ugly haha

I live in an agricultural area and I had a farm supply place make some new hoses for a '77 New Yorker I had once. Your metal lines are usually good for nearly forever if they don't get damaged. Sometimes they can cut the compression fittings off and press new hose on and seal it. Look for a place that makes hydraulic lines.
 
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Old Aug 10, 2020 | 01:36 PM
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Originally Posted by ol' grouch
I live in an agricultural area and I had a farm supply place make some new hoses for a '77 New Yorker I had once. Your metal lines are usually good for nearly forever if they don't get damaged. Sometimes they can cut the compression fittings off and press new hose on and seal it. Look for a place that makes hydraulic lines.
Yeah, it seems like AC components are either not all available or just very confusing to sort out. I also can't determine which switches would be correct, so I'm just going to throw the parts I have on and charge it... I might paint the rusty lines in some rust transformer, but really wish I could find a suitable aftermarket replacement. Good tip on getting custom made lines from a place that does hydraulic lines! Thanks!
 
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Old Aug 10, 2020 | 07:14 PM
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Don't run R12 switches with R134a refrigerant. You won't like the results.
 
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