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#1
08-04-2015, 04:31 PM
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W123 climate control vacuum elements - pods look identical
Hey everyone I'm planning to do the massive job of removing my dash and changing out all the vacuum elements and leaky heater core. I was pricing out the elements and see huge variances in the prices between them - for instance "Central Nozzle" and "Main Air Flap" - but to me the vacuum elements themselves all look nearly the same. ("Defroster Flap" appears to have an extra vacuum line connector.) The only difference seems to be the shapes of the little metal levers attached to each one. But I know you can pop the lever off an old pod and attach it to a new pod.
So... you know what I'm going... does anyone know if we can just buy a few copies of the cheapest one, intended to replace the three that look the same, and reuse our little metal levers? Cheers, Garrison
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Garrison R. '83 300D 
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#2
08-04-2015, 09:50 PM
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I'm cheap and bought diaphragms only. You can get to the pods without pulling the dash and I figured it was worth the risk.
To your question, there are single and double diaphragm pods. You can swap the connector as long as you install on a pod with the correct number of diaphragms. Try sourcing a few if you have a yard close by. They should be next to free. All/most of our cars of this era use the same pods. You can swap pieces by taking them apart with a small screw driver. People at the yards around me don't even know what they are or what the price is.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
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#3
08-04-2015, 10:01 PM
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In the junkyard I go to, if they dont know what it is, they usually give it to me especially if its a small part...good yard
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#4
08-05-2015, 08:25 AM
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Whoa I didn't know you can get to them without pulling the dash! I'm going to look that up.
Buying diaphragms only sounds great, I'll look around for those, too. Thanks guys this was very helpful.
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Garrison R. '83 300D
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#5
08-05-2015, 02:10 PM
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Pods are accessed on the 126 through the glove box and by pulling the panels on the transmission tunnel. There are long discussions about whether or how well the replacement diaphragms work. I've seen double pods with 1 of 2 diaphragms intact and the good one could be potentially used to repair another pod. I have no idea how long that would hold up given the age of the used diaphragm. You can have time or money. Take your pick.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.
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#6
08-05-2015, 04:36 PM
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You can buy the diaphragms only from George Murphy at performance analysis. I'm in the middle of a dash swap on my 83 TD and just finished the last diaphram yesterday. No more difficult than swapping out the whole pod. I don't think you can access the center vent pod without pulling the dash but maybe the others. The connection points can be pretty cramped and having the dash out definitely made things easier. Good luck
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