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Old 09-26-2002, 12:04 PM
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BlueBabyBenz BlueBabyBenz is offline
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Join Date: Aug 2002
Location: Vancouver, BC
Posts: 151
Leaking Vacuum Pump

I am about to embark on a 8000 mile journey in my 190D.

I have been aware of an oil leak that until yesterday I thought was the oil pan gasket. It was minor enough (1 litre every 2 months or so...) that I wasn't in a rush to address it. Last week I had the engine shampooed so I could see exactly the source of the leak.

My mechanic says it's coming from two sources-

1. The vacuum pump gasket (where its connected to the crankcase.)

2. Somewhere on the vacuum pump itself.

He says if the diaphram goes, it will allow oil into my vacuum system. Sounds to me like disaster would ensue.

According to him, there is no rebuild kit available.

Cost of a new vacuum pump installed- $1000 Canadian.

Is he just scaring me? Is this really an imminent disaster? I asked him about a used one, and he says that any used pump is probably about to go too. Does this mean all vacuum pumps are on the verge?

I am looking at what it would take to install it myself, but can anyone shed any light? This leak has been present through 3 months of my ownership and 6000 miles.


MB 1986 190D in my past
MB 1987 300E on the street
MB 1994 'Smoke Silver' E420 in my driveway
1999 Mazda Miata in the fun stable
1964 E-Type Jaguar Coupe- Sold
1970 E-Type Jaguar Coupe- Sold
1968 Corvair Monza Conv. with Turbo Transplant- Sold
1986 Merkur Xr4ti- abandoned
various mundane American autos

If I'd known then what I know now...

Hell, I'd probably still have done it anyways.
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