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#1
10-07-2004, 08:43 AM
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1982-240D-Vacuum System
Their is a bell shaped animal mounted to the passenger side inner fender and is up near the headlight...it appears to have a vent on top and it has 2 vacuum lines, one goes to the firewall and the other goes toward the engine...the one going to the firewall is not connected but is near a open vacuum line that comes thru the firewall...the other line goes about 18 inches toward the engine and is open ended and no open vacuum lines are in the area....what is this animal and what function/s does it serve...what are the 2 vacuum lines for...Jim
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James A. Harris 
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#2
10-07-2004, 05:24 PM
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From your description it sounds like the vacuum resivoir. I bet you have a few things not working. Door locks and possibly the doors that direct the air in the A/C-heater system. I bet all the air blows our the dash vents. YOu may have a few other things not working that I can't think of right now. Look for a vacuum diagram. I have a 300TD that should be similar, but my reivoir is under the rear of the car.
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#3
10-08-2004, 09:03 AM
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Could you post a picture? The vacuum reservoir on a W123 sedan is in the top of the trunk. Mine doesn't have the item you're talking about, but they added a lot of emissions stuff between 1980 and 1982. Could it be a charcoal cannister for recovering fuel vapors?
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Rick Miley 2014 Tesla Model S 2018 Tesla Model 3 2017 Nissan LEAF Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro Chain Elongation References
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#4
10-08-2004, 12:09 PM
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That should be your EGR switch valve. The tube going to the firewall is just vented into the cabin so it gets "clean" air. The other tube is supposed to go to the EGR valve under the intake manifold.
Mine got blocked, "somehow", with a small BB in the temp vacuum line so mine does not work. It sounds like your does not work either, not such a bad thing, Many people disconnect the EGR vavle setup. Go to this post and scroll down to the 240D vacuum diagram and click on the attached thumb. Pictures of Vacuum diagrams for W123 and W126 diesels # 15 is the temp switch that allows the system to turn on. #7 is the vacuum switch that controls the vacuum #9 is the EGR vavle under the intake manifold. Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#5
10-08-2004, 12:12 PM
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Switchover valve
I beleive this is the part that you are asking about... if it is, there will be a small electrical plug on the bottom of it....
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240_Dizzell 74 240D Auto,Beige (Totaled) 82 240D 4-Speed Manual,Gray (Retired) 260,000 97 E300 D Auto, Blue (Current) 240,000 05 E320 CDI Auto,TITANITE RED (Current) 158,000
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#6
10-08-2004, 03:56 PM
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Thanks for the picture and descriptions. That's one of the few things still unconnected in my turbo 240D conversion. I might have to hook it up to run the Colorado emissions test, but it should be easy enough to accidently unplug.
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'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg
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