Hi Don,
Nope, gas engines create all the vacuum they need. Only diesels need pumps
to provide vacuum. BTW, only the '85 and newer (as far as I know) have vac
pumps with the possibility of failing and having *bits of metal* get into
the engine where damage can occur. The '85 and older - I'm referring to
W123 mostly - have belt driven pumps - and while they can fail and allow oil
to get to places where it doesn't belong, they are not designed so damaged
vac pump metal can get into the engine.
BTW, diesels *do* produce vacuum but it's so very little it's not enough to
make much use of.
HTH's
Larry T (67 MGB, 74 911, 78 240D, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
Weber Carb Info http://members.rennlist.com/webercarbs
Porsche Road Test http://members.rennlist.com/roadtest/
.
----- Original Message -----
From: "Donald Snook" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, July 26, 2006 7:30 PM
Subject: [MBZ] Vacuum pump Vacuum Schump
There has been lots of talk about vacuum pumps on here lately. I am
finally concerned. I have had 6 Mercedes in my driving career and I
have never replaced a vacuum pump and have never had one blow up on me.
Perhaps I am lucky or stupid. One question I have is do the gas
versions have vacuum pumps? I know that a gas engine does develop
vacuum whereas a diesel will not generate very much. But, does Mercedes
put vacuum pumps on gas cars because so many things run off of vacuum on
these cars?
I am sure I will reveal my ignorance, but here are the other questions I
have:
Does my car (1990 300SEL 129K) have a vacuum pump?
If so, do I need to consider replacing it according to the Dr. Booth
advice every 150-200K miles?
If gasser Mercedes do have vacuum pumps, do they last longer than the
ones on diesels?
Does anyone know how to change the light bulbs in the instrument cluster
on a Ford Explorer? (At night only about half of the gauges are
illuminated and the odometer is dark from 60-80.
Donald H. Snook
1990 300SEL 129K
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