In the yard last week ,noticed a different looking pump on a 79 300d ,made in Holland was stickered on the housing .Is this a euro spec pump ?

That could be the elusive M Pump. I'd grab it.

__________________
1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition

M pumps are easy to spot. The delivery valve holders are splined shafts rather than flanged and held down with 2 bolts each.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Which yard was it?

__________________
'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

What is so special about an M pump?

__________________
Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles

From what I have read on this Forum what makes the M Pump special is that it can be modified with Different Elements to put out more Fuel quanity then is available in the MW Pump.

Otherwise for regular usage I have not read that there is any special benefit to having one.
In fact since it has the Splined Delivery Valve Holders and needs O-ring seals I am thinking that the MW Pump that does not have the O-ring seals would be more durable in normal use.
But, I would like to know more about the M Pumps also as my info is 2nd hand.

__________________
84 300D, 82 Volvo 244Gl Diesel

I don't think the pump itself would be worth a whole lot more than a normal one.....since it is a relatively small part of the $$ in having one modified.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

easier adjustment, smoother running and better design.

now, why would MB put the 'smoother running' pumps in the cars that never received cigar hoses???

better design.... ? how so?


your one-liners leave much to be desired; we're a curious bunch.

__________________

It provides a little more fuel with some adjustments - be careful about idle and run-away. If you add more air, then more power, if you are not adding more air, i.e. bigger turbo, supercharger+turbo, or other means then it is no use to you.

I have one and I am having 7.5mm elements installed and tuned. I will let let you know the results when I get it back.

Isn't the M-series pump simply the OM60x IP?

__________________

Gone to the dark side

- Jeff

Yes, but for a 5cyl.

I haven't noticed anything "special" about my "M" pump except its more difficult to do the delivery valve seals, and as far as modifieing it ..I could send it to Finland and for a bunch of $, make my 240 go faster, yah It doesn't run any "smoother" than the US version....

easier adjustment???? What adjustment would that be?

__________________


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"

better car design?

post-WWII, simpler governor, lighter, quieter and cheaper to build.

Is the M pump the pump that MB put on the 616 and 617 van motors?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13