ML270CDI Diesel pump is leaking

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Neo
Posts: 4
Joined: Sun 01 May, 2016 8:47 am
Model you own: w163

ML270CDI Diesel pump is leaking

Post by Neo » Fri 28 Apr, 2017 3:38 pm

Hi all,

My Diesel pump is leaking on the right side (Air filter side). When put my head down in the engine bay I can see the drips (1 every 3 seconds) falling behind the pump. I have checked the fuel lines but my guess is it's coming from the lower left cover plate which is part of the pump. I guess I'm lucky it's on the low pressure side but if I remove the pump is it possible for me (or someone) to remove that cover plate and reseal it?

Thanks for your help.
Neo

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Bartman4800
300 SLR
Posts: 1727
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: ML270CDI Diesel pump is leaking

Post by Bartman4800 » Tue 02 May, 2017 5:25 pm

Not trying to be pedantic but a few words of warning:

Common rail diesels run at a very high fuel pressure (up to 2000 bar/29,000 psi)

If you get fuel injected in your finger or other body protrusion make sure the ambulance is present.
Fluid injection under the skin is fatal if not addressed immediately!
If you can get medical help you might get away with some nasty scars running up your arm where the surgeon had to cut the skin to flush the fuel out.

To be honest, I think this is a job for the BOSCH diesel specialist

Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "missus car"
2002 VW Passat V6 30V Station Wagon (my new commuter bus)

Neo
Posts: 4
Joined: Sun 01 May, 2016 8:47 am
Model you own: w163

Re: ML270CDI Diesel pump is leaking

Post by Neo » Tue 02 May, 2017 5:39 pm

Thanks Bart,

I'm going to be removing the pump to fit a seal kit but I was already concerned about the high pressure and was wondering how long it takes to die down. Your point is very valid so I'll double up on the nitrle groves and make sure that only a long spanner is touching that HP rail when I losen that pump nut. Will also wear googles too.

Thanks again for the "heads up" on this ;-)

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