There is a white plastic valve or modulator which sits at the rear and on top of the injection pump on a 617 engine. There appears to be two vacuum lines coming out of it, one which goes into a round green "pot" which then has another vacuum line coming out of it. Does anyone know the name/part number for this particular white plastic valve or modulator? Thanks!

It's the VCV or vacuum control valve.

It is no longer available from Mercedes, or anywhere else, new.

You're going to instead need to investigate fixing yours, or sourcing a functional used part.

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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino

http://i.imgur.com/LslW733.jpg

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i got one i don't need it's your's if you want it.

They are adjustable, what is the problem?

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83 SD

84 CD

Here is the DIY on adjustment:

Transmission flaring or clunking? VCV DIY - Mercedes-Benz Forum

Not to pick nits, but just a note that some early ones are not adjustable. I had to replace the one on my 1980 TD with an adjusted one from a 1983.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

^Thanks, all mine were/are later models.

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83 SD

84 CD

Well......I just got the word that these vacuum 2/3 valves are NLA so I thought I would attempt to locate one that is used but in good condition. Speaking of which, does anyone know the actual MB part number for the vacuum control valve?

lolz... the last of these cars rolled off the assembly line 30 years ago. i'd LOVE it if most companies stood behind a product for thirty years.

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1981 NA 300D 310k miles

http://www.peachparts.com/shopforum/diesel-discussion/356706-car-down-need-help-sourcing-vacuum-control-valve-vcv-84-300sd-w126.html


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Vacuum Control Valve and the 2/3 valves are two different items. The VCV sits on top of the IP and regulates vacuum to the transmission. The 2/3 valves sit on top of the valve cover and switch on/off emissions type items (EGR, etc) I believe.

On both of my 617's I have removed the 2/3 valves. That was done many many years ago.

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Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

^ Agreed.

I have taken the 3/2 valve out of the equation on both cars.

https://www.youtube.com/watch?v=qaubu8OcWR8

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83 SD

84 CD