not-front-rule

1999 E300D Injector Pump

Welcome to the Mercedes-Benz Club of America Forums
Here, you'll find members en masse who can talk, guide, answer or listen to your Mercedes-Benz related questions and comments. Participation in the forums is free to Club members. If you're a guest of this site, you'll have access to our read-only discussions. Like what you see? Join the Club to get full Q&A privileges. If this is your first visit, be sure to check out our FAQ page.  To start viewing messages, select the forum that you want to visit from the selection below.

Forum Jump

14 replies [Last post]
System Admin
monarchd's picture
Offline

Posts:
9305

I need to replace (or have rebuilt) the injector pump on my 1999 E300D. Where can I find a new injector pump or a reliable rebuilder?

Share this
Former Member
Sokoloff's picture
Ocean Isle Beach, NC
Offline
Joined: March 29th, 1995

Posts:
2553

Vehicles
2003 SLK320
1983 240D

Please tell us what makes you think you need a new pump? Those of us with the same car are curious.

__________________

Len

'59 220S cabriolet

'83 240D 348,500 miles original owner

'99 E300D 170,000 miles

'03 SLK320 27,500 miles

Member
jtripp's picture
Babylon, NY
Offline
Joined: September 15th, 1976

Posts:
1289

Vehicles
1996 S420 LWB
1995 S350
Bad diagnosis

I'll bet that this is another E300 with fuel and air leaks in the hands of the wrong mechanic.

__________________

New York club member since 1976.

Continuous Mercedes ownership since 1964.

1993 300SD with '99 606 engine. 111,040 miles.
1994 S350   75,238 miles
1995 S350 148,124 miles.
1996 S420 with '99 606 engine  Sold
1999 S600  one of 14 imported  Sold 
1989 Bentley 8  Sold at 40,000 miles.

Former Member
Sokoloff's picture
Ocean Isle Beach, NC
Offline
Joined: March 29th, 1995

Posts:
2553

Vehicles
2003 SLK320
1983 240D

That's why I asked the question.

__________________

Len

'59 220S cabriolet

'83 240D 348,500 miles original owner

'99 E300D 170,000 miles

'03 SLK320 27,500 miles

Member
jtripp's picture
Babylon, NY
Offline
Joined: September 15th, 1976

Posts:
1289

Vehicles
1996 S420 LWB
1995 S350

I'm also interested as I have 3 of these engines. The injection pumps on models prior to the '98-'99 will outlast the rest of the car. The jury may still be out on the longevity of the fully computerized "drive by wire" pump on the '98-'99 engine.

So, Mr. Richter please keep us informed.

__________________

New York club member since 1976.

Continuous Mercedes ownership since 1964.

1993 300SD with '99 606 engine. 111,040 miles.
1994 S350   75,238 miles
1995 S350 148,124 miles.
1996 S420 with '99 606 engine  Sold
1999 S600  one of 14 imported  Sold 
1989 Bentley 8  Sold at 40,000 miles.

Anonymous
Guest
Anonymous's picture
Replacement of E300DT Injection Pump really necessary?

richter wrote:
I need to replace (or have rebuilt) the injector pump on my 1999 E300D. Where can I find a new injector pump or a reliable rebuilder?

It has been my experience that most M-B dealerships recommend either complete replacement or the rebuilding of these diesel Injection Pumps - unnecessarily! In most cases, they simply leak diesel fuel at either the Delivery Valves (where the Injection Lines connect to the Injection Pump) and/or at the Fuel Shutoff Valve. Replacing the six small O-ring seals (one at each Delivery Valve) and one O-ring at the Pump’s Fuel Shutoff Valve usually fixes this problem. I would also recommend that you have the Delivery Valves properly double-torqued with a good quality and accurate Torque Wrench as well - as you do NOT want to distort the Injection Pump housing. If you do the job yourself, you’ll need a special 1/2” Drive Splined Socket (HAZET #4556 or M-B Special Tool #617 589 01 09 00). I believe that the Nm double-torquing values are 32 & 35 respectively. While under there, it may be a good opportunity for you to also replace all the fuel lines and the two Prefilter O-rings as well – especially if they’re original to your car.

I’ve recently been reading about Viton (Fluorocarbon Elastomer) as an alternative to the OEM rubber seals (that usually last six years or so). Although originally developed for scientific and military applications, where high temperature resistance and memory compression resilience are needed, this newer material is showing promise for solvent-based environments such as diesel Injection Pump seals, etc. - especially with the newer ULSD fuel now is use.

Good luck!

Anonymous
Guest
Anonymous's picture
Re: 1999 E300D Injector Pump

I have a ’96 E300 Diesel, (150K) and it appears that fuel is intermittently seeping out of the top of the injection pump to the copper injection fuel lines. The mechanic suggested replacing the entire injection pump as well. Are the seals on these pumps difficult to replace or something? Perhaps the injection pump on the ’96 is different (no O-Rings?) than on the '98/'99 models?

This may be helpful for others with this vehicle…
I have recently replaced all of the short fuel lines near the fuel filter. (I think there are about 6 of them?) Also I had a flexible (black, about 2ft long) fuel line replaced near the firewall that was cracked and the car was getting air. This caused all kinds of intermittent start problems.

nhdoc (not verified)
Guest
Anonymous's picture
Re: 1999 E300D Injector Pump

dan_e;105018 wrote:
I have a ’96 E300 Diesel, (150K) and it appears that fuel is intermittently seeping out of the top of the injection pump to the copper injection fuel lines. The mechanic suggested replacing the entire injection pump as well. Are the seals on these pumps difficult to replace or something? Perhaps the injection pump on the ’96 is different (no O-Rings?) than on the '98/'99 models?

This may be helpful for others with this vehicle…
I have recently replaced all of the short fuel lines near the fuel filter. (I think there are about 6 of them?) Also I had a flexible (black, about 2ft long) fuel line replaced near the firewall that was cracked and the car was getting air. This caused all kinds of intermittent start problems.

Read the post above yours. The problem you describe is leaking delivery valve seals. It is not necessary to replace the pump to fix this. The parts cost about $15 and it takes a couple of hours for a knowledgable tech to accomplish it. Find a tech who knows what they are doing and you'll get it fixed.

I did mine in December after they started leaking. I had to buy a special socket for the valves. If you are an advanced DIYer it is doable but unless you feel comfortable taking it apart I would suggest leaving it to a pro.

Anonymous
Guest
Anonymous's picture
Re: 1999 E300D Injector Pump

nhdoc;105098 wrote:
Read the post above yours. The problem you describe is leaking delivery valve seals. It is not necessary to replace the pump to fix this. The parts cost about $15 and it takes a couple of hours for a knowledgable tech to accomplish it. Find a tech who knows what they are doing and you'll get it fixed.

I did mine in December after they started leaking. I had to buy a special socket for the valves. If you are an advanced DIYer it is doable but unless you feel comfortable taking it apart I would suggest leaving it to a pro.

Thank you for your response!! I think I'll try it providing I get the right tool. Also, do we know that my '96 Fuel Injection Pump is the same as the '99? (I believe '96/'97 only non-turbo manufactured then, '98/'99 Turbo Diesel only?) Interesting enough, it is not presently leaking. Temperature change maybe? Thanks again for your response!

Member
jtripp's picture
Babylon, NY
Offline
Joined: September 15th, 1976

Posts:
1289

Vehicles
1996 S420 LWB
1995 S350
Re: 1999 E300D Injector Pump

The '95-'97 injection pumps are vastly different from the '98-'99. However they use the same delivery valve seals.

The earlier pump is more mechanical using manual levers and vacuum controls and an external cruise control mechanism (Tempomat). The '98-'99 pump is completely computer controlled. There are no mechanical linkages and no vacuum lines connected. There is only a 5 pin plug going to the injection pump. Every function inside the pump is controlled by the computer electronically including cruise control. It is a drive by wire item.

__________________

New York club member since 1976.

Continuous Mercedes ownership since 1964.

1993 300SD with '99 606 engine. 111,040 miles.
1994 S350   75,238 miles
1995 S350 148,124 miles.
1996 S420 with '99 606 engine  Sold
1999 S600  one of 14 imported  Sold 
1989 Bentley 8  Sold at 40,000 miles.

Anonymous
Guest
Anonymous's picture
Re: 1999 E300D Injector Pump

Just purchased a 99 E300D to replace my 87 300D which is going to my son . car was picked up in MD. and driven to mass , a 6 hour drive with no problems ,lots of power at all speeds now 2 weeks later it has started to flame out ( sudden loss of power) during hard acceleration, getting on highway passing etc. some light blue smoke visable in rear view I or l see no wetness or fuel leaks on or neer injection pump. seller clamed complete MB service done on car filters etc. what could this be air?water? bad in tank filter or pump . never had this problem my 87 or ether of my 85 BMW 524tds , Vdubs, not even my 4.3 liter V6 diesel Buick power was never a problem with that car it had none:confused:

Member
jwreames's picture
Ruxton, MD
Offline
Joined: January 23rd, 2007

Posts:
14

Vehicles
1999 E300 Turbo Diesel
1999 E300
1985 300DT
Re: 1999 E300D Injector Pump

Check the prefilter; it is right in the fuel filter housing where the clear plastic tube goes into it to the passenger side of the main filter. It is secured by one 10mm hex head machine screw. When you buy a new prefilter, you will also need to buy the o-ring for it. You probably want to change the main filter as well; it comes with a bag that has an o-ring or two for the hollow bolt that goes through the housing; be sure to replace those.

B-service does NOT include fuel filters. They are a separate item @60k intervals.

Of course a bad batch of fuel can plug filters... I keep spares in my trunk.

-j.

__________________

Guest
ceraxton's picture
Offline

Posts:
3
wrote:I’ve recently been

wrote:
I’ve recently been reading about Viton (Fluorocarbon Elastomer) as an alternative to the OEM rubber seals (that usually last six years or so). Although originally developed for scientific and military applications, where high temperature resistance and memory compression resilience are needed, this newer material is showing promise for solvent-based environments such as diesel Injection Pump seals, etc. - especially with the newer ULSD fuel now is use. Good luck!

Can someone tell me where I can find the specific Viton O rings for a MB 1999 E300 Turbo Diesel?  Everyone seems to recommend these type of O'Rings in my research, but I can't seem to locate them.  I have Bing'd and found this...

http://www.bing.com/shopping/search?q=Viton+(Fluorocarbon+Elastomer)&mkt=en-US&FORM=BPFD#x0y0

but I'm too much of a novice to know what I am looking for here.  I am doing the Internet research and forwarding this over to my professional mechanic.

BTW: I am having problems starting my MB when its cold and I can see air in my lines.  Fuel is also leaking out the top where the lines come into the engine.  We think we have the problem diagnosed, I just can't seem to find where to purchase the parts. 

Any help would be greatly appreciated!

 

__________________

1999 - 300 Turbo Diesel

Former Member
Sokoloff's picture
Ocean Isle Beach, NC
Offline
Joined: March 29th, 1995

Posts:
2553

Vehicles
2003 SLK320
1983 240D
Contact Jim at

Contact Jim at http://www.fryerpower.com/store/index.html.  He used to sell complete viton O-ring kits for the 606 engine, but I don't see it listed separately on his page anymore.  He is very helpful and I'm sure can fix you up with what you need.  I've dealt with him and recommend him.

__________________

Len

'59 220S cabriolet

'83 240D 348,500 miles original owner

'99 E300D 170,000 miles

'03 SLK320 27,500 miles

Guest
Stygimoloch's picture
Offline

Posts:
533
Viton is a specific brand of

Viton is a specific brand of o-ring, not a type of o-ring. Any modern o-ring will work just as well.

__________________

AKA, ForcedInduction. ASE certified master technician.
1982 300D Holset HE221W turbo, 7mm M-Pump, A/W intercooler, W/M injection
1980 240D 3.0T OM617a, 4-speed manual, 3.07 diff

Forum Jump

Share this