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#1
08-16-2006, 10:07 AM
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How do I clean the ALDA vacuum lines?
What’s the proper procedure for cleaning the vacuum lines and associated connection points around the ALDA? I’ve heard a lot of talk about these lines being clogged and causing poor acceleration and fuel economy (which is what I’m experiencing).
1992 300D 2.5 with 270K miles
__________________
San Antonio, TX. 1983 300D 
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#2
08-16-2006, 10:21 AM
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I used brake parts cleaner on mine. It blew out a bunch of black gunk. My banjo bolt was filled with gunk as well and I used the same process to clean it. Sure runs better when that stuff is clean!
__________________
2005 Accord Hybrid (Wifes) 1995 Subaru Impreza L AWD (Snow car) 1984 GMC Sierra 1500 (Mine) 1983 300CD Best $ I ever spent. (Mine) 1984 190D (sold and glad I did) 1983 300D (sold and wished I hadn't)
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#3
08-16-2006, 11:14 AM
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Quote:
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San Antonio, TX. 1983 300D
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#4
08-16-2006, 11:27 AM
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Mine is real easy to get to. (W123) I beleive it is a 12 mm wrench, just loosen it up. It is a pretty long thread. There were two washers on mine, one in front of and one behind the metal coupling the banjo bolt runs through. Just be careful and catch both washers. Really an easy job. Took me about 15 minutes to clean the ALDA and all tubing and bolts.
__________________
2005 Accord Hybrid (Wifes) 1995 Subaru Impreza L AWD (Snow car) 1984 GMC Sierra 1500 (Mine) 1983 300CD Best $ I ever spent. (Mine) 1984 190D (sold and glad I did) 1983 300D (sold and wished I hadn't)
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#5
08-16-2006, 12:12 PM
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The crud originates at the manifold end and progresses toward the ALDA, so you want to disconnect and clean in the opposite direction. Brake or carb cleaner worked best for me. The banjo bolt may be a PITA to get to, but it would probably be the dirtiest, and definitely should be cleaned (if dirt in the lines is actually your problem).
My lines are clear plastic, making them easy to check. Wes
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#6
08-16-2006, 01:19 PM
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Obnoxio-
Here's a good link to the Diesel Giant pictorial. When I did mine last week, I found the line to be clogged as well as the banjo bolt. After a half hour of ceaning out the nasty stuff (wear gloves if you got 'em!), I feel like I'm driving a different car. Maybe a 15-20 hp boost. Pretty cool, and free! http://dieselgiant.com/mercedesaldaboostsystemservi.htm good luck- Kevin
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