WTB: NEED asap euro, m-pump, primary fuel pump for euro diesel w123 om617 - PeachParts Mercedes-Benz Forum

NCfriend · #1 02-03-2014, 01:36 PM

Hey members,
I am not sure all the different ways to describe fuel pump I need to fix a failing one on my 1984 grey market/ euro NA om617 m-style injection pump.
I may have miss named it in one way or another, but there is enough here to help me figure out if:

anyone has a known good fuel pump
off a european tuned diesel IP

Have not found any part source besides limping my wallet to the dealer

Any help?

I like to do trades, but have paypal ready

thanks!

cooljjay · #2 02-03-2014, 02:23 PM

Are you talking about the injection pump its self? Or the small lift pump on the side?

The lift pump can come off any model w123, there are no differences....I am running one from a turbo sd in my 300d

NCfriend · #3 02-03-2014, 03:02 PM

Yes, the complete lift pump or fuel pump.

Not just a primer, and fortunately not the IP.
I don't have the car in front me me, but the indy shop says it is unique to fit the euro style injection pump?
Correct me if we are wrong please.

All other models are very interchangable

cooljjay · #4 02-03-2014, 10:33 PM

Quote:

Originally Posted by NCfriend

Yes, the complete lift pump or fuel pump.

Not just a primer, and fortunately not the IP.
I don't have the car in front me me, but the indy shop says it is unique to fit the euro style injection pump?
Correct me if we are wrong please.

All other models are very interchangable

They don't know what they are talking about.....they are all the same across the board....it is to dark to go out tonight, but I can go get the part number off my euro to show you they are the same....He just wants your money...you can either rebuild the one you have or buy a new one for about 120$....

Why does he say you need a new one? What is his diagnosis....the lift pump rarely just goes out...

winmutt · #5 02-04-2014, 08:20 AM

Sure its not a leaking manual pump? There is a rebuild kit available for $20 or so. Finding a replacement might not be so easy. I agree with the questions, what was the diagnosis leading to failed lift pump?

SurfRodder · #6 02-04-2014, 10:47 AM

Quote:

Originally Posted by cooljjay

They don't know what they are talking about.....they are all the same across the board...

Why does he say you need a new one? What is his diagnosis....the lift pump rarely just goes out...

The euro m-pump I have for my 617 has a 2-bolt flange like the pumps for the 60x... The MW pumps on US 617s have a 3 bolt flange. I have one of the lift pumps he is talking about, but I am rebuilding it using a kit like winmutt mentioned and will install it on my 603. These manual lift pumps are fairly rare here, i did find one on ebay.de a while back and almost bought it, then remembered I had the same one on my project m-pump.

I agree though, the lift pumps are fairly robust... Id rebuilt it first if it seemed like it really needed it. anoher option of course if you dont mind losing the hand pumping capability (gotta keep cranking to fill the injector lines if they ever go dry) is to use one from a 60x engine.

NCfriend · #7 02-04-2014, 10:49 AM

Air bubbling in the (clear) fuel line and weakening the engine.

This is the diagnosis that i have been given so far.
The shop is a good distance away, but Gary's Automotive in Candler, NC is reviewed by tons of locals as the best MB shop around. Though anyone could make a mistake.

The filters were clogging after sitting almost a year for body work.
Shop dropped the take and had it boiled, cleaned the sender, flushed all hard lines, and replaced screen, filters, and rubber lines at the tank.

Same shop redid all seals to the IP a couple years back.
Now AIR is bubbling in one of the lines between lift pump and IP.
No fuel leaking that I know of or heard any claims of this, just air in the lines.

For this model, the mechanic claims that the mounting bolt arrangement for the lift pump is totally different than other w123s??
I can't say from experience, but I thought this IP was totally different size and shape than other w123 diesels?

They are trying a new gasket though first.

Happy to have all your feedback folks!

NCfriend · #8 02-04-2014, 10:53 AM

Thanks SurfRodder, just saw your comment.

So there is a difference that makes them rare
BUT they can be more easily rebuilt than replaced. Excellent advice

I will ask at the shop today

Does the AIR leak make sense for the need to rebuild a lift pump???

SurfRodder · #9 02-04-2014, 12:05 PM

I would start by replacing the hand primer pump, especially if its an older one that has the hard white/yellow plastic plunger that unscrews to allow the pump to stroke. I had one on my MW pump 617 that had a leak giving those same symptoms. The replacement version primer pump with the black plunger are about $20 and will include the new o-ring seal between the primer and lift pump which could very well solve your issue. Re-reading that is likely what winmutt was referring to. There is a thread here(I think, may have been bw...) I saw a while back that showed a rebuild of the main lift pump. It may help to get the bosch part number from the lift pump itself as I think the thread contained it.

Edit: also with that part number a good Bosch shop should be able to source the rebuild kit (cheap) or a replacement pump, it just may take a week or so to get as i think they were pretty rare.

Edit2: found the thread I was thinking about: http://www.peachparts.com/shopforum/diesel-discussion/294499-refreshing-fuel-pump-om617-european-spec-%96-non-turbo.html

so I mentioned above that the newer om60x lift pumps would probably work, I think the only issue is the roller that contacts the IP cam may have different diameter so that part may have to be swapped if you go that route. At any rate, that thread shows how simple/robust these lift pumps are and you could lkkely follow Stretch's lead and replace orings and crush washers from a generic metric kit.

cooljjay · #10 02-04-2014, 02:44 PM

Well learned something new today, I thought they were the same.

I also vote for the primer pump being the issue....the gasket can be made with gasket maker....I used that on my american one...no leaks so far..