I just assembled my new India injector pop tester and want to test my OM617's injectors *but* ~ whenever I have the steel lines off the IP fuel continually seeps out and makes a mess as well as wetting my new engine mounts etc. with Diesel fuel .

I tried pinching off both rubber hoses but the dribbling of fuel persists ~

My question : is this normal or is something amiss in my IP ? .

TIA ,

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

That doesn't sound right to me, I can see a little bit weeping out but it should not be a steady leak unless fuel is getting past the delivery valves. Maybe time to rebuild the delivery vavles? New copper washers required.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC

Delivery valves have all been replaced .

I actually get a dribble of fuel running out from under the car , I too thought this wrong but figured to ask before replacing the injection pump , I have a spare one from a nice '85 that was side swiped and junked , NO exhaust smoot on the back of the junked car whatsoever .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

remove any source of pressure from the fuel supply, see if it stops. (open the fuel tank)


as long as it idles and runs fine, it isnt a problem.


But that certainly is not 'typical' behavior at all.


Where did you get the DVs from?

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This might be a good time for a diesel moly purge. Just don't hook the hose back up to the lift pump when you're finished with the purge.

If you'd rather not go through the purge perhaps you can disconnect the fuel lines and plug them up to stop the fuel flow.

I know exactly how you feel about diesel or oil on the engine mounts and shocks. Shock mounts cost an arm and leg now.

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84 300SD
85 380SE
83 528e
95 318ic

Thanx Guys .

I got the delivery valves from a rebuilt injection pump , they're branded but not BOSCH , I've forgotten what brand mark they have .

I hope to get back to it this week .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Like jt20 said, it could be pressure in the fuel tank due to thermal expansion. Still, I have never experienced a continuous flow of fuel when the DVs are installed.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

Thanx ;

Pressurized fuel tanks usually give an audible " WHOOSH " whenever you remove the filler cap , this one doesn't .

I also made sure the rubber venting valve underneath the car is in good shape and not clogged a while ago .

I will remove the cap to see what's what .

I hope to get up there to - morrow and yank all the injectors , do a warm engine compression test (did the valve adjust last week) and then replace all five injectors with some a buddy recently pop tested , none drool and all have perfect spray patterns .(tested a large bag full of injectors & gave him the off spec ones to play with)

My new made in India pop tester shows them all popping @ 125 BAR , my Buddy's pop tester showed them all popping @ 135 BAR so I'm betting the liquid filled gauge on my new tester is off spec. ~ as soon as I figure out where to take it for proper testing , I'll know but for now I want to stop the smoking and spitting of oil out the exhaust , why I'm also doing a compression test .

I have this engine rebuilt and I'm beginning to think they didn't do suck a great job ~ they installed the IP several degrees late timed , stole a few small things (magnetic drain plug etc.) .

Who knows what else they did poorly .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

It could be that your IP timing is so far off, it is causing the smoking and possibly the fuel dripping from the IP. They probably got the IP off a few teeth during the reinstall. Oil coming from the exhaust is more than likely a bad turbo seal. Also make sure it is oil and not moisture mixing with carbon build up and getting blown out.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

The lift pump is not a flow through pump which means it needs to be mechanically actuated to move fuel through it, when stationary, it should act as a check valve. Is the tank full (more pressure)? Maybe the lift pump is bad?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

This was my initial thought when a fellow DieselHead here tried to show me how to properly time it .

In the end , we lined up the factory external scratch marks and it was *much* better .

He said he doubted it'd run at all if the IP was even one spline off , when I suggested that .

-Nate

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

How do I test it ? .

I REALLY appreciate all the suggestions here as you alls have way more Diesel experience than I do .

I have an entire spare IP and plan to try it after I've done as many other things as I can first....

-Nate

If I remember correctly there is a Vacuum test where you "T" into the Fuel Inlet Hose before the Fuel Supply/Lift Pump. That would be the easiest to do. You can get a free rental combination fuel pump/vacuum gauge from some place like AutoZone. Note the AutoZone fuel pressure gauge is not suitable for the other tests.


There is a couple of tests you do on the pressure side. But, that requires you to make some adaption for a pressure Gauge to be installed and even a liquid filled (dampened) gauge has the gauge needle moving quite a bit.

I a at the library and cannot look up the specs from the Mercedes Service Manual.
It take some sort of restriction in the gauge line to dampen out the needle movement completely. See if you can find one of funola's threads. He used the typical Oil Pressure Gauge nylon tubing that is about 1/8" and apparently the small diameter of the tubing dampened.

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84 300D, 82 Volvo 244Gl Diesel

Thanx ~

I have a vintage vacuum/pressure gauge designed to fuel pump testing .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

For a 617.952 the idle vacuum is 0.1 bar

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84 300D, 82 Volvo 244Gl Diesel