Mark, did you ever find a rebuild kit for that pump? I can find one for the 1980 SD all day long. Nothing for this oddball on the ’79.
Ben near Detroit
From: bgiovan [mailto:bgiovan@cavtel.net]
Sent: Monday, February 07, 2011 9:10 PM
To: '
Subject: RE: [diesel_mercedes] Re: Vacuum pump 101
Thanks! Read it. http://autos.groups.yahoo.com/group/diesel_mercedes/message/53626
I posted the same question on Kent Bergsma’s board and this was his reply: “The newer style pump is the better design because they did away with the rubber diaphragms. They are not directly interchangeable. You would have to change the I.P. pump timing device that drives the vacuum pump. Older style had two diaphragms and the repair kit is dealer only.”
So looks like I need to source the repair kit. Maybe. I note your request of me in the last paragraph and now I do remember reading this one. I’ll let ya know once I get this thing back on the road.
Ben near
From:
Sent: Monday, February 07, 2011 11:22 AM
To:
Subject: RE: [diesel_mercedes] Re: Vacuum pump 101
It was message number 53626, titled "Super-Leaky SD - Solved?", October 18, 2010.
Only rebuild the diaphram pump if that's the set-up you have. To convert a piston-style-equipped engine to the diaphram-type pump requires more than mere bolt-across. It's all in the "Super-Leaky..." post.... Except for the part where I found the rebuild kits for the diaphram pumps (at autohausaz.com, for instance, you hafta to look it up as a rebuild kit for an earlier car, say, '74 240D. All the look ups for the '79s bring up the piston-type pump).
Now that I know this, I'm probably going to convert mine back to the original diaphram pump.
Mark in
> To:
> From: bgiovan@cavtel.net
> Date: Mon, 7 Feb 2011 10:26:24 -0500
> Subject: Re: [diesel_mercedes] Re: Vacuum pump 101
>
> Sorry Mark - wasn't thinking about it in October! I'll do an archive
> search. I was just surprised I guess that within the span of a
> half-year these cars had two different vacuum pumps. So rebuild the
> double diaphragm is the consensus?
>
> Ben near
>
> On 2/7/2011 10:24 AM, Mark in
> >
> > Nah, the one on the right is the double-diaphram style, used on the
> > earlier (and so, generally, non-turboed) diesels, AND was the original
> > unit on my '79 SD. The one on the left is the piston type that is now
> > pretty common in the yards around here, because there simply AREN'T
> > any pre-80 cars in the yards right now. The nice thing about the
> > earlier unit is that it's still rebuildable for relatively cheap ($25
> > for two diaphram kits), whereas the kits for the piston type are over
> > $100 and were not available last time I checked (in October).
> >
> > It was in October that I submitted a rather comprehensive (and,
> > admittedly, lengthy) post on my findings on these pumps. 'Guess
> > nobody read it.... (Insert pity party here.)
> >
> > Mark in
> >
> > ------------------------------------------------------------------------
> > To:
> > From: vwnate1@yahoo.com
> > Date: Mon, 7 Feb 2011 04:52:19 +0000
> > Subject: [diesel_mercedes] Re: Vacuum pump 101
> >
> >
> > Good question ! .
> >
> > Maybe one is a NA and t'other is from a turbo equipped engine ? .
> >
> > -Nate
> > Ben wrote:
> > >
> > > Both cars built in 1979 but two totally different vacuump pumps. Why
> > for?
> > >
> > > https://picasaweb.google.com/116318077355015592300/OM617VacuumPumps#
> > >
> > > Ben near
> > >
> >
> >
> >
>
>
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