Looking for A/C hose part number...

[Zaxxon]

Hello all!

Got my A/C up and running yesterday, but in the process discovered that I have a hose that is in dire need of replacement. Problem is that I can't locate the part number in EPC - there is a hose that looks almost like what I am in need of, but there is no part number attached to that exact part of the graphic! Anyone have any idea what the part number for this hose is? It has the low side port on it and goes down and around a 90 degree bend, followed by a 180 degree bend into the back of the compressor. If someone has a source or has one laying around, please let me know!

Thanks for your help already in advance!

--Zax

P.S.: Excuse the mess the engine compartment is in at this point in time - I believe in getting all the mechanicals squared away before making it pretty

[Max-NL]

Why not crimp new hoses to the existing connectors? This way you know you get new hoses instead of some old stock stuff.

[Zaxxon]

Why not crimp new hoses to the existing connectors? This way you know you get new hoses instead of some old stock stuff.

I am thinking of going that route - there is a place down the street that makes mostly hydraulic hoses, but maybe they have the correct fittings/hose...I have to ask once I take it out.

[Max-NL]

Don't know if "Das Haus" did this with the 116, but some high pressure hose connectors consist of 2 parts, an outer and an inner part. You could cut the outer part, remove hose, insert new hose and ferrule and then compress the ferrule. This way you don't have to look for new fittings. And I assume that a company that work with hydraulic hoses could do this.

Picture as a reference:

[Zaxxon]

Yes, I think as long as they have the correct barrier hose and possibly the metric ferrules they could certainly do that - I used them in the past to have some power steering hoses for my boat remade while using the existing fittings.

[UTn_boy]

I'm assuming that this is for your 1978 450sel?  The pictures you posted don't show up, so I can't see what your talking about.  However, you mention that is has the low side service valve on it, so this may help. 

There are a lot of variables as to which one the part number will be.  It depends on your VIN, whether or not it has a fuel cooler, whether or not is is a U.S. or Euro model, and whether or not A/C was added subsequently.  And does it have the GM A6 compressor, or the european type Sanden?

Typically, there was a manifold that consisted of both high and low side lines that included a muffler and service valves for both high and low side. 

This manifold I speak of is part number 116-130-11-57, but is no longer available.  The last price was around $372 for the manifold assembly. 

Until we know exactly what you have, we can't really help.  Would you mind telling the information listed above? 

[Zaxxon]

Hello!

Yes, sorry, I should have been more clear - it's the '78 450SEL (VIN 11603312076618) that I am talking about. Regular US version, OEM A/C with ACC2 controls. I am not sure what compressor is in the car, but I have a pic that shows at least part of the label of it - not sure if that might help:

https://goo.gl/photos/VmpmAjU1oVQwcsy8A

The pics in the original hose show up in my machine, which is weird - maybe I need to look for a different host. But it's the hose that connects right above the low side port to a rigid line, and then goes to the compressor.


Thanks in advance,
Zax

[UTn_boy]

Well, from the picture, I see a GM A6 compressor, which is what I thought it might be.  The metal line you're looking for is one in the same with the one that runs beside of it.  This assembly is called the A/C compressor manifold assembly, and is all one piece, even thought it looks  like two separate lines.  In order to replace this line, you'll have to source a complete manifold.  It's unusual for these to give trouble or leak, but stranger things have happened.  I also hope we're on the same page here.  If not, then let me know so I can try to help.  What confuses me is that you show pictures further up in the post of what looks like a rubber line connection.  The rubber lines should screw on to the manifold assembly.  One will go to the condenser, and the larger one will go thought the firewall and attach to the thermal expansion valve under the dash. 

[Zaxxon]

I will probably have to dig into it and just remove the line(s)/manifold. You are right, it sure doesn't look like it's all one piece, but it very well may be! If you look at the second picture in the first post, you can see all the way on the bottom where it goes back to the compressor the part of the line that is kind of shielded with a squared off metal piece - it's right underneath that where it's leaking. And it must be a big leak, because I could very clearly hear and see the UV dye/oil/gas bubbling out from the foam insulation around that line. If it really is a hard line just covered by foam insulation, it might just have corroded from trapped moisture in that foam, and depending how bad it is, I might just tig weld it, or add a new section of pipe in there since it's NLA...

Thanks for your expertise - it's greatly appreciated!

[Zaxxon]

Just looked into this a little more and found the following picture of the manifold online:

https://www.german-spob.de/start.php?teilenr=1161301157&name=Hose---Pipe-Aircondition-A/c,--R107,-W116-V8&seite=details_suche_gebrteile&artikel_id=16904&language=eng&paget=gebr

It looks very close to what I have, sans the foam insulation and the metal shield on top of it (that may very well be separate!). The high side connection on top looks right, the low side connection however in my car doesn't have a 90 degree bend it seems, but much rather connects straight up as you can see in the picture in the first post. Not sure what the difference there is.

[UTn_boy]

Well, as I previously mentioned, none of the two pictures in your first post show up.  Nothing is there. 

The assembly in question is definitely one piece.  The insulation is only there to prevent sweating, but hearing that it's leaking mid line is really weird.  I'd try to have it welded up.  Afterward, pressure test it with air or vacuum to ensure that it no longer leaks. 

The link you provided in your last post is likely for a W108/W109 car or a very early W116 with D-jet.  It may or may not work, but even if it did bolt up and clear all obstacles, you'd still have to find different lines that attach to it.  It would be making a lot of unnecessary work. 

[Zaxxon]

Oh ok...so maybe they listed it wrong under that part number. I attached the links to the pics - maybe that works. I think my best action at this point is removing the manifold and getting rid of the insulation to see what's going on with the lines. I can TIG them myself, so that's not a big issue, and pressure testing I should be able to accomplish too...I guess I was just hoping for a quick replacement to get this buttoned up, but oh well, not tragic either!

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