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 Fixing crushed air suspension piping
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mookschank

Australia
8 Posts

Posted - 08/31/2017 :  05:55:02  Show Profile  Reply with Quote
Hi folks,

I had posted this in the valves sticky but thought its a specific problem i have and if anyone can give me ideas to rectify.

I have been looking into replacing my valves, (have already done the airbags following the really informative thread on this site - thanks everyone).

Looking at my rear valve however, a couple of air lines going into the valve are squashed (previous owner/s). I'm not sure how easy it is to repair this and thought I should shout out if anyone can offer their thoughts? I think I only have a few options available:-

a. Heat up pipework and bend back into the rough shape but not worry about looking squashed. (And hope not to split an air line!)

b. Replace section - I note a hose on page 3 of this thread, can a shop do this work? Are these pipes typical in pneumatic/hydraulic shops?

c. Don't bother and replace with an Accuair system (don't crucify me on this idea - I am weighing up spending $4k on valves rebuilding or grafting $1k Accuair system on my existing air bags and air tank/compressor system. If fixing crushed pipework puts me over the edge i may consider this).


If anyone has any ideas on what i can do, it will be much appreciated.

Thank you,
Mook.







alabbasi

USA
2806 Posts

Posted - 08/31/2017 :  12:17:16  Show Profile  Reply with Quote
Hard steel lines should be available at the auto parts store for brake systems and should be up to the job. They can be cut down to shape, and you can use your old fittings on the new pipe, with the ends flared.

They can be bent to shape by someone who knows what they're doing.

With best regards

Al


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Art Love

Australia
6138 Posts

Posted - 08/31/2017 :  23:50:53  Show Profile  Reply with Quote
You need special tools to bend this size steel pipe without its deforming and to do the flaring. I think I am correct in describing the flare as a double flare but would be happy to be corrected. I believe the pipe is a metric size and if you are not in a metric country [you don't say where you are from], you may have trouble replacing it. Unfortunately, these are the longest pipes in the car.

You will have trouble just undoing those lines with the pipe deformed like it is. I'd be trying your option a. before anything else, you will need to do it anyway just to release the lines.

Hopefully, others will respond.
Art
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AgSilver

USA
207 Posts

Posted - 09/01/2017 :  09:48:15  Show Profile  Visit AgSilver's Homepage  Reply with Quote
It may be possible to have flexible stainless steel braided lines as used for brakes fabricated with correct fittings to connect to the valve and be "spliced" to the existing line or even just replace the hard lines with the flex line. Companies such as Mako http://makohose.com/?page_id=289 should be able fabricate a replacement from a sample.

Palm Beach Gardens, FL
Niederheimbach, Germany
300SEL 6.3
E55K AMG
CLK63 AMG Gone
Ferrari 400GTC4 Gone
ML400CDI BiTurbo
ML350 CDI BT
9146GT

Edited by - AgSilver on 09/01/2017 09:49:29
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paul-NL

Netherlands
4193 Posts

Posted - 09/01/2017 :  10:04:36  Show Profile  Reply with Quote

Why don't you consider to switch to plastic lines ??
The feedline to the rearvalve of my 600 has such from the factory mounted ....








Edited by - paul-NL on 09/01/2017 10:09:45
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AgSilver

USA
207 Posts

Posted - 09/01/2017 :  12:25:52  Show Profile  Visit AgSilver's Homepage  Reply with Quote
Paul, your thoughts on plastic/nylon lines is a better and certainly more economical way to go and easier to work with. The entire Airmatic system on our E55K utilizes nylon lines. I had thought about it, but I just wasn't sure about compatible connectors. However, now on second thought, this is is probably not an issue whatsoever.

And the original 48 year old nylon vacuum lines for the W109's central locking system are still leak-free to this day.

Palm Beach Gardens, FL
Niederheimbach, Germany
300SEL 6.3
E55K AMG
CLK63 AMG Gone
Ferrari 400GTC4 Gone
ML400CDI BiTurbo
ML350 CDI BT
9146GT

Edited by - AgSilver on 09/01/2017 12:31:02
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werminghausen

USA
766 Posts

Posted - 09/01/2017 :  23:30:48  Show Profile  Visit werminghausen's Homepage  Reply with Quote
quote:
[i]
Hi Paul, are you saying the rear plastic line was original? Or was this a repair?

I was just now rebuilding the very same line for a 600 which was done in plastic. I was thinking this was maybe a repair option as the other lines on this 600 are all in steel. If you say yours also has this line in plastic.... seems you are correct. But why would Mercedes do such thing? They never tried to save much in a 600.

Martin



Hi Martin, I have no indication that that line was a repair, but all seems to be since it left the factory. I have only the axle valves renewed and the brakebooster because the internal pressure loosing ...
Can you tell me which Vin that 600 had with that "plastic" line ?? Mine is 002484 ...

Edited by - paul-NL on 09/02/2017 11:10:07
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werminghausen

USA
766 Posts

Posted - 09/01/2017 :  23:34:16  Show Profile  Visit werminghausen's Homepage  Reply with Quote
Hi Mook,

if need is I can build you plastic lines to size/length with fittings for the air suspension.
Martin
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mookschank

Australia
8 Posts

Posted - 09/02/2017 :  02:12:17  Show Profile  Reply with Quote
Thanks for the suggestions folks, really helpful.

Looks like I will go for the bend a bit and if it splits, go for the plastic line throughout. I have the temp schraders in there for the moment so its not critical.

And hi Martin thanks for the response - yes I am looking to do the valves and if i split the pipe may as well order a plastic pipe replacement with the valves! (I'm still planning for my garage to be built sometime in 2018 and this will be a good clean place for the valve swap and piping).


I will update my profile, I'm in Melbourne.
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paul-NL

Netherlands
4193 Posts

Posted - 09/02/2017 :  11:13:17  Show Profile  Reply with Quote

Oups, sorry Martin ...

I hit the wrong button and "edited" your posting to answer your question ....

The rear feed line is the only in "plastic" .... Why ??? I have no explanation ??


Edited by - paul-NL on 09/02/2017 11:20:43
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tcj

Germany
34 Posts

Posted - 09/02/2017 :  17:30:25  Show Profile  Reply with Quote
the rear steel feed line is the line that internally corrodes most quickly because it carries water (condensed) to the rear valve (aided by the fact that the long line at the underside of the car is cooled very good). So in a way it makes sense to replace it by a plastic line.

regards,
Thomas


Thomas

112.021 300SEC
116.028 350SE
116.036 450SEL 6.9
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Art Love

Australia
6138 Posts

Posted - 09/02/2017 :  18:50:32  Show Profile  Reply with Quote
As far as I know, this line is routinely "plastic" from the Factory in all 600's. Here it is in #178.








Here it is in #1942, the ex Bob Jane presidential landaulet.








Art
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Art Love

Australia
6138 Posts

Posted - 09/02/2017 :  19:10:06  Show Profile  Reply with Quote
Here it is in #560, covered with black paint, but recognizable.



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paul-NL

Netherlands
4193 Posts

Posted - 09/02/2017 :  19:26:53  Show Profile  Reply with Quote

Hmm Art and Thomas,

That is very good to know, that that rear feedline seems to be not only on the late(r) cars.

And Thomas your explanation could be very well understandable ....

Thanks for that info ..
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tcj

Germany
34 Posts

Posted - 09/03/2017 :  02:34:20  Show Profile  Reply with Quote
thanks.

And if anyone needs new plastic lines: Martin is able to build new ones.

Thomas

Thomas

112.021 300SEC
116.028 350SE
116.036 450SEL 6.9
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olliw109

Germany
382 Posts

Posted - 09/03/2017 :  06:39:21  Show Profile  Reply with Quote
Hi, I used plated steel lines from the metre, Should make it for my last decades. Use new fittings, bending needs a little bit of practise but is not too difficult with the right tool.

300 SEL 6.3 3478+5327
Oliver
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