I have an '82 300sd, om617.951 with the usual MW pump. I may be able to get an M pump from another forum member. What are the advantages of the M vs MW? Is it worth changing the pump with no other upgrades?

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1982 300sd, new project car to restore

It doesn't matter if you know what you're doing, as long as you look like you know what you're doing.

I have had cars with both pumps for the last 10 years and I see nothing that would induce me to go to all that work of changing IPs. The delivery valve seals of the MW are easier to do. If you want a pump to modify so you can go faster the M pump can be send to Finland. Big bucks, tho.

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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"

There is no benefit to replacing an MW pump with an stock M pump. The reason people like them is because you can mod the M pump and get a whole lot more power. The MW pumps can't be modified the way the M pumps can. Don't bother switching unless you plan on modifying the pump.

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And that modification with the current exchange rate....is VERY expensive. Shipping is an arm and a leg too.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Dumb question

how do you tell the difference between the two?

Sorry, I've only recently been thinking about getting more power from a 617.

If I do in fact put a OM617 in a Jeep Cherokee, I would want 200hp. Will a MW pump do that?

All my performance reading has been on 603's.

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D

It would cost somewhere between 2 and 3 thousand dollars with the current exchange rate to have an M pump modified and shipped both ways. (maybe even more). 200HP would need that among a LOT of other things.. bigger turbo, inter-cooler etc....and you are going to lose low end drivability (slower spool time) to gain high end power. Not sure that's what you want to trade off in a Jeep where bottom end torque means more that top end power.

Easy identification....look where the plates that lock each element in place on top where the fuel lines attach to the delivery valves. MW has two nuts on each and each valve has its own plate. The M runs diagonal and the plates share a nut. But in all honesty there are MANY other differences...they share nothing in common to my knowledge with each other.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Here is a pic of an M-pump

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of course, that's a pic of the engine side of the pump... useless unless you have the pump in your hand.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

That's actually the left side of the pump.....fender side in that view.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I have one sitting on my workbench in hopes the Euro will fall to at least parity with the dollar sometime soon.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

HEY, he switched the pics!!!

now the pic shows what you would see in the car.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I've got two. one in my euro 240, one in my euro 300 both manuals... kewl!

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

AH.......I didn't see the other one.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I did.
I realized the engine side pic is kind of useless.


Did the M pumps come on the automatics?

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Maybe I should be thinking about putting a 603 in a Jeep instead of the 617. Problem is the 603's tend to come with cars attached. 617's can be had all day long. A $100 606 would be nice to find

I don't even have to go look.. I gotta MW.

__________________
08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D