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  #1  
Old 11-19-2004, 08:30 PM
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Vacuum connectors

Replaced one 4way and three 3way vacuum connectors, the old ones had little cracks in it. Break feeling is much better now and I got rid of an annoying zooooming sound under the dash.

Great feeling when a small investment pays off!

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Old 11-19-2004, 09:31 PM
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Quote:
I got rid of an annoying zooooming sound under the dash.
Hey Jorn, Just out of curiosity, what do you suppose the zooooming noise was under the dash?
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Old 11-19-2004, 10:07 PM
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I'm not sure, but I guess it was escaping air, it would last and change in tone for a couple of seconds after turning the engine off. In the beginning it would only be there if I used the heater the day before, but the last months the sound was always present. Drove me nuts, now there is still a little rattle; sounds like someone is rattling a key chain...something is loose under the dash.
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Old 11-20-2004, 11:42 AM
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Jorn,

If you have an auto trans, I hope you didn't replace the triconnector on the vacuum valve with one with out the restriction.

If you did, you will be looking for another transmission soon.

P E H
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Old 11-20-2004, 12:28 PM
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What do you mean, you are scary me. See photo's, for the the connectors I replaced please tell me they are the right ones. These are the only one available.
Attached Thumbnails
Vacuum connectors-d301115633feb.jpg   Vacuum connectors-d301126557feb.jpg  
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Old 11-20-2004, 06:45 PM
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Jorn,
Though I am in no way attempting to speak on behalf of PEH, I believe he may be referring to the tri-valve/connector in the main vacuum line that leads directly to the brake vacuum booster. If so, mine is grey and has two diverter nipples going off at 90 degree angles from the main line. I'll be watching this one carefully since one of the nipples broke recently on my '84.
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Old 11-20-2004, 06:49 PM
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Long way to get to the photo but this is what I think he refers to.

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1AQ11OMUJ1DT148EM3&year=1984&make=MB&model=300-DT-001&category=N&part=Booster+Vacuum+Hose&appChassis=_any
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'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.
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  #8  
Old 11-20-2004, 07:24 PM
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Don't forget to replace the straight vacuum connections. they are rubber and can deteriorate as much as the 3/4 way connectors. check the hard lines for crackes and oil. clean them with carb cleaner or brake cleaner.

Dave
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  #9  
Old 11-20-2004, 07:27 PM
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Jorn,

The vacuum tri connector I'm talking is the one that connects the vacuum supply to the vacuum valve mounted on the IP and the transmission. It has a restriction in the lead going to the vacuum supply which alloaws the vacuum valve to vary the vacuum to the transmission depending on the position of the throttle.

This connector looks like he one in the pictures but should have a plastic clip on the lead that has the restriction inside it.

This is only applicable to cars with auto transmission.

P E H

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