Thanks for posting this Larrybible. Your info was extremely helpful.

I used it in doing the change out myself on a 83 300d. Good grief the space was tight. I had to snake the valve around the backside of the oil filter housing to get it to go into place.

I also had to use some electrical tape to hold the gaskets in place until the valve was seated as they kept spinning on me and I couldn't get them to line up. After I had it seated I carefully removed the electical tape and bolted it in.

I had to make my own mini wrench by cutting my 10mm in half to have enough room to turn the bolts.

After getting it all together before I bolted it in I pulled on it a couple of times to see that it was hooked. After I bolted it in I tried the tests you recommended with the mighty vac. I couldn't get it to move any linkage or feel air when I pushed the stop lever... so I was really worried about trying it. I had read here that another forum member experienced the same thing so I got the air cleaner off had my girlfriend in blocking position and I was ready with the 17mm but the valve worked perfectly.

I'm not sure that the linkage will move when vacuum is applied or that air can be felt from the valve when the stop lever is pressed. At least it wasn't the case in my model.

rturtle,

I'm glad yours worked out okay. I remember the vac check of the stop lever being posted earlier in this thread and you're the second person that said this was not a valid test.

The main thing is to be ready for emergency shut down. I was not. It makes me sick every time I think about this episode.

Enjoy,

Yes the feeling is horrible. I had just put a rebuilt pump on a IH 856 tractor, had a friend start it up, ran away immedlaely, pulled the stop cable too hard and it broke.

Used a pair of bolt cutters to cut the injector lines. I got drenched in diesel fuel, but saved the engine. The rebuilder did reimburse for the injector lines, but it was one experience I never, never want to live trhough again.

When reassembling a pump to an engine, I always have a CO2 extinguisher, bolt cutters and a wood block to put over the intake.

__________________
71 220D 169K wrecked
83 240D 118K sweet 4 speed
91 350SDL (one of the 60% good engines) 156K
84 300d (loaner to my sister) 189K
79 300SD (partswagen)
86 420SEL partswagen
70 220d (partswagen)
68 280s GASSER!!! under construction now
85 300sd 310K miles winter beater car retired
93 300d 2.5 turbo 168K wife's car
83 280SL euro 5 speed 155K
69 250S newest project 54K

I'm sorry to hear about ur car.

There r 2 things in life money cannot buy - love and good health.

U seem to have both. With that u can put this episode behind u and move on to bigger and better things.

Take some time out and then jump into ur next project. It will help u take ur mind off ur loss.

It is healthy to grieve. The old adage "Time heals all wounds" is true.

Hang in there.

I had the same response with my linkage, the actuator did not move the external linkage, but does engage and move the "control rod" internal to the IP. Thanks to Larry's post, I was prepared with my 17mm wrench just in case. One interesting thing I've noticed about the throttle linkage - if I pull UP on the accelerator petal, the linkage moves into the stop position.

How about simply cutting the feed line to the IP from the main filter. I doubt the motor could keep running without the reserve from the mail filter for as long as it would take to cut the injector lines to all 5 injectors (or 4 or 6). And of course this allassumes the specific runaway is not oil fed. Yes the motor will run a good long while if you simply pinch or open the prefilter.


And Larry, I do feel for you. All that work, time and money up in smoke.

__________________
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

boneheaddoctor,

We've been ALL through that before. There is absolutely no need to cut or destroy anything if you are just prepared to loosen the lines at the injectors. I was NOT prepared to do that and in that moment I thought that I would risk a fire. I know much more now.

After doing any IP work, have the air filter off and be ready to block the intake with something flat and strong, not your hand, and/or be ready with a 17MM open end in your hand.

There is enough fuel in the pump to ruin the engine regardless of what line you cut. Just be prepared.

Good luck,

Yes, you are right. Always be prepared for the worst......also I should have said crack open rather that cut the feed line to IP. IP does hold fuel but not nearly as much as the main filter holds and I know we are talking several minutes of fuel in that. Stuffing a balled up shirt into the intake would be far faster. Assuming is open and accessible at the time.

__________________
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

NO! DON'T USE A BALLED UP SHIRT! It will suck it in there and hang valves open and who knows what all. Use a block of wood or something flat and strong. It has to go over the intake with the air cleaner removed. I tried covering the air cleaner snout, and it lost RPM, but enough air leaked to keep it running.

With air cleaner off, a 2 X 4 block would probably be good enough to seal it off.

Good luck,

When I did my IP shut-off valve, i removed the air cleaner housing down to the turbo. Our first attempt failed and the engine ran away. I immediatly slapped a dvd case over the turbo opening and it completely sealed, killing the engine almost instantly. I also had my bro with a 17mm wrench trying to undo injector lines, but the dvd case stopped the engine before he could get even one undone.

Once again here is a guy who, through his own trials and tribulations, comes back and tells us all how to save ours from the same fate.

I know you're a fast typist Larry, but it still takes your time and willingness to share info with us all.

Thank you Mr. Bible........once again. Are you to 8000 posts yet?? Didn't notice with this new format. Not a complaint--I kinda like the new format.

Cheers,

Bill

Actually shuting off the fuel on a tired diesel engine is a bad idea, it could run off the crankcase oil! Your better off doing what Larry sudgested or discharging a co2 fire extinguisher into the intake.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

There is more than enough fuel in the IP to wreck the engine, it won't use much without any load on it.

Loosening injector lines, CO2 extinguisher (which you should have anyway) or blocking the intake are sure bets -- the latter is the least likely to work due to air leaks.

Don't use a dry chemical extingisher....

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Before I went out on my own as a contract mechanic, I worked in a small independent shop. One of the other mechanics made a mistake on setting the rack on a turbo'd Detroit and it ran away. He tried putting his hand over the intake side of the turbo and it was pulling such a vacuum that it pulled blood through the skin. He almost lost his hand, and it took skin grafts to finally make things right again.
I have also seen a N/A Detroit that was running away suck a 1.5" paperback service manual through the intake and spit it out the exhaust as burning confetti.
Best bet is to have a piece of wood that will fit over the intake to shut off the air.

__________________
1971 R600 Mack toterhome (SuperDawg)
99 NU-WA Snowbird 34+2 SE 102 5er
If it's not diesel, it's not in my stable!
53 F100 617.951/auto
95 Dodge 3500 Cummins/5 speed service truck

I know what it must have felt like watching a diesel you built turn into a pile of scrap...and I am glad I read this because I am getting ready to rebuild my IP Pump..I dont think everything happens for a reason, but sometimes misfortune turns into opportunity also...when my first 240D siezed after I bought it from a someone who swore it was great ( it had bad rings) I decided to learn about diesels and Mercedes...that was 5 years ago , and thats when I came upon diesels, Mercedes and you in a Mercedes Shop Post that you answered..if I hadn't I'd probably be tuning cars instead today.....