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#1
02-18-2009, 12:05 PM
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Id this and I assume it should be connected
So just starting to get under the hood on our new ride. Steal learning tons so bear with me.
What is this? I would guess an oxygen sensor. I would expect it should be connected? The hose that should be connected is just plugged with a screw. 84 300sd 
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#3
02-18-2009, 12:14 PM
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It's the EGR valve. Plugging the hose is the correct solution to eliminate EGR from the engine.
Do a search on "EGR" and plan to spend some time learning about it.
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#4
02-18-2009, 01:09 PM
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You can shove a BB into the rubber line and then re-connect it so it at least "looks" like it's functioning...
__________________
-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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#5
02-18-2009, 01:13 PM
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He has an ARV, whatever you make sure you don't change the functionality of the ARV.
__________________
http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#6
02-18-2009, 01:15 PM
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Quote:
My '84 has no ARV...........
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#7
02-18-2009, 01:16 PM
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How about replacing the breather tube that's making your valve cover all icky.
__________________
1985 500SL Euro w/ AMG bits 130k  1984 300SD Turbodiesel 192k  1980 240D Stick China 188k  2001 CLK55 AMG 101k  2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! 
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#8
02-18-2009, 01:16 PM
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Oh ah, doh I am an idgit.
Just by pass the egr and the 3/2 vavles IMO.
__________________
http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#9
02-18-2009, 01:18 PM
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Quote:
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#11
02-18-2009, 04:01 PM
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I put a pair of hose clamps on my breather tube, there even seems to be a nice ring around the elbows just for a hose clamp....lol, after tightening them up, no more icky valve cover. Nice and clean now. +1 on the egr and 3/2 bypass. I have done this and it solved my vacuum problems, and even made it seem to run better.
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#12
02-18-2009, 04:10 PM
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Check that plastic elbow. It will often crack along the seam if clamped too tight.
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#13
02-18-2009, 04:42 PM
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I couldn't even touch anything under the hood before at least wiping it off.
__________________
1985 500SL Euro w/ AMG bits 130k 1984 300SD Turbodiesel 192k 1980 240D Stick China 188k 2001 CLK55 AMG 101k 2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
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#14
02-18-2009, 07:02 PM
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Well, here is mine - '81 300SD - and it is still connected as you can see. I have read the threads about not needing the EGR valve and taking everything off the valve cover - but I just cannot make myself do it. Everything is still stock.
I am puzzled. What did MB not know, or what did it later learn, when it designed and installed all this EGR valve stuff and the tubing that goes from place to place? 
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#15
02-18-2009, 09:15 PM
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EGR = Stupid Amerikaner Crap to Clog Intake
U.S.Congress (Now there's the largest group of un-indicted co-conspirators
on the Planet) mandated through the CFR and EPA enforces all the EGR Crap.
__________________
'84 300SD sold 124.128
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