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#1
04-15-2009, 11:30 AM
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124 VCV replacement
Cant seem to find what I need in the forum....
92 300D and I need to replace the Vacuum Control Valve... I have been told there is a simple install/adjustment procedure but cannot find a thread with this information Thanks in advance Wayne
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Wayne Jockers 1992 300D 
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#2
04-15-2009, 11:44 AM
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What makes you sure its at fault?
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#3
04-15-2009, 12:00 PM
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I purchased a new VCV because the rubber elbow fell apart...Now I figure since I have over 100 bucks invested I may as well replace it after 238K
Wayne
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Wayne Jockers 1992 300D
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#4
04-16-2009, 03:27 AM
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VCV R+R
Loosely affix the two Screws/Bolts holding the VCV to the IP
Open the "Throttle" linkage All The Way, and hold it so (An assistant helps) rotate the VCV clockwise until tension/resistance is felt,tighten the Screws/Bolts
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'84 300SD sold 124.128 Last edited by compress ignite; 04-16-2009 at 03:58 AM.
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#5
07-10-2009, 02:35 PM
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Let’s assume that I adjust my VCV and the vacuum reading is not 420+- mbar for my 602.962 engine. Can I rotate the VCF to fine tune it to the correct reading? In other words, can I adjust the maximum vacuum the transmission sees with this adjustment?
Testing and setting Vacuum Control Valve Thanks!
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1993 W124 300D 2.5L Turbo, OM602.962 2000 Chevrolet Cavalier, 2.4L DOHC 2002 Ford Explorer, 4.0L SOHC 2005 Toyota Prius, 1.5L http://www.fuelly.com/sig-us/40601.png
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#6
07-10-2009, 04:09 PM
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Although the rubber elbow (which is only a vent for the vacuum system anyway) is NLA, there's a straight version available from MB. I suppose you don't really want to hear that, having purchased the entire VCV, but it might help another some day . . .
Jeremy
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 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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#7
07-10-2009, 05:12 PM
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Micro-Tuning
Oldwolf,
You May Do Anything You Wish , It's Your Mercedes, However, the Vacuum measurement specifications in the test,come with no recommendations as to what action to take if Actual vacuum measurements are out of specs.(I'm sure the Implied Action is to run down to the parts counter and get a New VCV.) ["Mercedes, Repair by Intuition" should be the title of the FSM] So,I know you're out there cranking your VCV back and forth in Micro-measurements (AND measuring the Vacuum). Please let us know if your efforts have any beneficial effect.
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'84 300SD sold 124.128 Last edited by compress ignite; 07-10-2009 at 05:22 PM.
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#8
07-15-2009, 01:48 PM
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I located this document and it pertains to the VCF and is somewhat interesting as it addresses what I was considering.
124 Transmission Tips
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1993 W124 300D 2.5L Turbo, OM602.962 2000 Chevrolet Cavalier, 2.4L DOHC 2002 Ford Explorer, 4.0L SOHC 2005 Toyota Prius, 1.5L http://www.fuelly.com/sig-us/40601.png
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