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#1
12-23-2003, 03:29 AM
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Injection pump leak
My injection pump on my 1983 240D has developed a leak right around the number one pump element. Fuel seeps out of the bottom of the #1 pump element. I took the element out and cleaned it, and i could not see any evidence of an O-ring. Should there be one? The others dont leak, and I don't know if they have rings or not.
Thanks guys
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Nick ***** 2002 Sprinter 2500 140" High Roof  :
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#2
12-23-2003, 11:23 AM
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Yup, there is an 0-ring on there, but you have to look for it. It is squashed flat and rock hard, easy to miss. Take a pick of some sort and prod around part way up where the pressure valve holder fits into the hole, you will find it.
Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#3
12-23-2003, 01:04 PM
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Peter
Isn't there also a small crush washer underneath the pressure valve carrier that can be replaced?
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'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique
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#4
12-23-2003, 01:42 PM
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fisherman..."washer underneath the pressure valve" I think thats the copper one down at the bottem of the hole. I made a little hook on the end of a small welding rod to be able to get those little washers out, they were really stuck in there.
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 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#5
12-23-2003, 05:19 PM
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Yep, that's the one.
On my MW pump on the 300 I don't believe that it has an o-ring just this washer which seals the pump element.
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'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique
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#6
12-23-2003, 05:31 PM
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sealing ring...
I tried to look this up in my parts catalog and all I get is the o-ring type of sealing ring.
Is this an m pump with pneumatic governor? If so it is the same pump as the one I am working on right now and yes, virginia it does use an o-ring... Could be yours ripped apart or never got installed after the last timing project. Does your delivery valve have a smooth area about 1/2 inch long right above the threads? if so this is where the o-ring fits.
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'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique
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