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Air conditioning; upgrade and refill
Topic Started: Tue Apr 3, 2007 2:44 pm (2,017 Views)
cossie connoisseur
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there can be only one ;-)
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Im looking into my new one being recharged, unfortunatly its extremly difficult to tell if it is r12 or r134 apart from a sticker!

Im looking at the records to see if it has been done but would be suprised if it was not done tbh.

Anyway the cost for conversion is a little supriseing, bear in mind prices are plus vat but exclude discount;

filter dryer £77.75
expansion valve £34.64 ( not needed for conversion but is an item that can fail)
upgrade hose £32.87 (only needed in extreme case 90% will not need this)
adaptor plugs, you will need either straight or angled ones;

straight cost £4,83 and £4,23. Angled cost £13.02 and £12,30

The sign to state its conversion is 75p

Mercedes charge £142,88 to evacuate the system, dry it out, then add dye to check for leaks and finaly the r134 with new oil already in the can.

Obviously other outlets are cheaper but the MB parts cost are not that bad.

Also note that mercedes air con units even in mid 80s were made with conversion in mind so its internals will cope fine with the conversion.

Hope this helps people out. am waitiong for confirmation on mine and also pictures of pre and after conversion along with the sticker to look out for!

many thanks

Nick
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Conrad
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Therapy Needed
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There's a specialist down the road from my work that does the full conversion for £150 all in.
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thinksoutloud
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Part of things
[ *  * ]
Hi Nick, am in similar position to you in that I need to sort mine but not similar to you in that I don't even have an idea of what the unit looks like :lol: Where is it located? Do you have a pic or two? Am confused between your 'recharge' and 'conversion' chat - do you have a moment to explain? :unsure: Have read about the variations so here's to hoping mine still has a sticker somewhere! <_< :)

Ta,
.j
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
right the cost of parts are for the conversion from r12 ( old system) and r134 (new system)

once it is converted (new parts put on) you will be left with an empty system, this is where the £144 recharge cost will come in as it will both regas and reoil your air con system enabling you to use it.

If you look behind the pasanger side head light there will be a small filter there. if you look from under the car you will see it beter. The adaptor plugs are for ataching the r134 refil system onto the car.

Conrad can you PM me details on that conversion as it would save a lot of hastle :)
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Conrad
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Therapy Needed
[ *  *  *  *  *  * ]
http://www.autotest.org.uk/

There's a useful diagram on there explaining the system too.
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
bollox they are miles away :(
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Matt
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Administrator - Hawk Eye

My Air-Con system has been upgraded to the R134 B)
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
got any pictures?
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Matt
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Administrator - Hawk Eye

What do you want pictures of?
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
just the general outlay of the system behind the pasanger headlight :)
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Matt
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Administrator - Hawk Eye

Well generally its the same as an R12 system. The main thing being that the seals are replaced when converted and maybe a pipe or two.

I will get some pictures for you tomorrow.
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
ideal ;)
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Mark
Part of things
[ *  * ]
I'm in the same process with my 190 and I need to upgrade from R12 to R134a, has anyone had any experience of a company who can do this in Suffolk?

Regards,

Mark.
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Gnasha
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More than part of things
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Matt
Apr 3 2007, 03:03 PM
My Air-Con system has been upgraded to the R134 B)

I recently enquired at my local MB dealership about the conversion from R12 to R134a. While they agreed it can be done they had concerns about vac-ing/purging out all the lubricant specifically suited to R12 gas, apparently its not possible to remove every drop of the previous lub. They had experience of the oil residue foaming and causing problems in the newly charged system at a later date.


Anybody experienced this at all with R134A gas? or any probs at all with the conversion.

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frank133
frank133
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Why is everyone converting the air con system,
I did read somewhere about the new liquid isn't compatible with the old stuff.
But if it works why upgrade it,I am not having a go I am just interested.
And if mine wanted regassing would I have to upgrade. :ph43r: :ph43r:
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Will
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Highly Addicted
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frank133
Apr 27 2008, 05:18 PM
Why is everyone converting the air con system,
I did read somewhere about the new liquid isn't compatible with the old stuff.
But if it works why upgrade it,I am not having a go I am just interested.
And if mine wanted regassing would I have to upgrade. :ph43r: :ph43r:

Hi Frank,

It's because the 'old' gas, R12 isn't available any more, has been stopped because of environmental concerns.

R134 is the new gas that most air con systems use, and to enable people to use this in older cars certain parts need to be replaced to make the system compatible.

I would tend to agree with Gnasha, AFAIK for a proper conversion you are looking to remove the compressor and replace the oil in that, plus the majority of the seals etc.

Will
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RobertE
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Serial victim...
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I believe (have been told, anyway) that the old fluid (R12) is still available and is used in some heavy truck systems, but I have no idea whether it is legal or not for use in cars. Any truckers on the forum confirm this?
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Gnasha
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More than part of things
[ *  *  * ]
R12 is defo banned within the EU. The chances of finding some one that will charge with R12 is remote. unless you find an old fridge and connect it up which is possible.


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frank133
frank133
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Gnasha
May 2 2008, 06:29 PM
R12 is defo banned within the EU. The chances of finding some one that will charge with R12 is remote. unless you find an old fridge and connect it up which is possible.

I do have a old fridge in the shed will have to have a look,
my air con works fine now ,two of the fuses were corroded,so the front fan wasnt kicking in,I wont pay £150 for a upgrade,that is a rip off,The old stuff is only environmentally unfriendly when you evacuate the system ,into the air,[not that anyone would notice]
If mine packs in I will open the sunroof :ph43r:
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weiser
Part of things
[ *  * ]
Thought I'd bring this old topic back to life

My air con doesn't work on the mercedes 2.6. The merchanic has said the pipe for the compressor is damaged or something and because it is connected to the compressor the whole thing needs replacing.

My question is if he replaces it will I be able to use the air con as won't it be an old system using the new gas?

Or do I replace the whole thing which takes the new gas?

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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
to convirt to r134 is quite easy but does need to be done by a specialist.

what you need is to take it to someone to convirt it, i cant see the need for a new compressor if the pipe is damaged? if there is no fluid in the system then it wont engage so no damage would happen.

you need a new refil pint the filter changed and a few seals ect but thats all thats needed.
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weiser
Part of things
[ *  * ]
So, I should scrap the idea of fixing the old system and just replace the whole thing?

Sorry not very clued up on air con stuff

Not making myself very clear here. Does the compressor and piping need fixing before I can convert or is it best I replace the compressor and piping for new to accept new gas?

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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
take it to someone, get them to change the pipe then they can convirt the system and if if the compressor dont work then they regas and you have working aircon
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weiser
Part of things
[ *  * ]
Not sure why the mechanic is saying the pipe is connected to the compressor and he is unable to de-attach the pipe from the compressor as it is one whole thing

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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
lines 1
parts 2
compressor 3
compressor lines 4

thats most of it, as you can see the lines are seperate
Edited by cossie connoisseur, Thu Jun 11, 2009 3:13 pm.
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weiser
Part of things
[ *  * ]
Just spoken to the mechanic its the pipe to the condensor not the compressor

Anyhow, I'm going to leave it for now as the replacing it plus labour would cost me too much as I have the car in there because it was misfiring

Thanks
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
ok in which care yes you need a new condensor, £300 from mb or £130 from ECP
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weiser
Part of things
[ *  * ]
Yeah he said he can supply a 2nd one plus labour and gasing it up for £200

which I think is a good deal but that added on top of my 1st bill its too much for this visit - I will get it done but just not on this visit to him

Thanks mate for helping out
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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
thats ok, at least you know how much to save
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aemt
Serial 190E Owner
[ *  *  *  *  *  * ]
Going to book the Sportline into Nationwide Autcentres for a check to find out the state of the (non working ) aircon.

Did you end up having parts replaced Nick and if so what and how much?

I cannot see any stickers saying it has been converted and i am assuming that the seals are knackered. Which would mean conversion full service and re gassing.

Does this seem a reasonable assumption?





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cossie connoisseur
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there can be only one ;-)
[ *  *  *  *  *  *  *  *  * ]
hi andy,

i got hold of a new condensor radiator for £180 and they changed the dryer i think its called?(cylinder behind the passinger side headlamp) included in the £150 refurb service in 2007.

seals will need changing, system will need to be checked for leaks (by pressurising with a dye), new top up connectors that attach to the inlet pipe on the condensor radiator and regassing/oil at the very least.

obviously if parts need changing the price could rise quite quickly!

if the gas is low the compresor wont turn which if its been left for a while may lead to it siezing ive hurd.
Edited by cossie connoisseur, Mon Sep 13, 2010 2:28 pm.
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aemt
Serial 190E Owner
[ *  *  *  *  *  * ]
Thanks Nick. May as well bite the bullet.

Really do need the air con with no sunroof.

Like you I will ending so much on this car that is not worth selling it.

Not a bad thing though ;)
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