On the Compression issue He might have some sticking Piston Rings. Running the Engine may cure that but if not soaking the Piston/Cylinders in something like Marvel Mystery Oil might free them up.

Some People say using Synthetic Oil would also in time do the same.

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84 300D, 82 Volvo 244Gl Diesel

Granted, it's not cold outside yet, but if you hooked up your block heater, you will nbe giving the cylinders a real advantage in case you have glow plug relay or glow plus heat issues.

Having a warm block makes life much easier.

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

Another day, another try.

I tried to start it in the morning, with a full battery and everything. Didn't work. Despite letting it glow for a while.

Ok, i thought to myself. Maybe it just needs some more cranking, just load up the battery and try again in 2 hours...

During those to hours my cousin called if she could come by to see the 200D run. "uuuhhmmm yeah. It doesnt run. But you can stop by and we can pull-start it."

1 hour later - 1pm my cousin arrives, and we hook the 200D up to the W124. After 200 meters of pulling it starts, ok let it settle in a bit before we stop and i drive it home by itself I think to myself.
That's when the engine starts to go TACKATACKATACKATACKATACKA-BUMM.




F**K.



I wildly honk at my cousin and gesture to stop, while forgetting to shut the engine down. Smoke pours out of the engine compartment. When we are at a standstill, i shut the engine down too.
A quick look into the engine compartment reviels the problem: Cylinder number two had blown out his glowplug ...

Keep in mind, the engine kept running on 3 cylinders until i shut it off, no problem whatsoever. Well, apart from the huge cloud of smoke and the weird noise and... but im getting distracted here.

So i tell my cousin to drive to the next village where we can turn round.
Off we go, everythings fine, until on the last turn after which the road goes back to my home, we cut the corner too tightly, and the rope snaps

You're thinking now, that this might not be my day? Continue reading.


So now i get a ****storm from somebody who lives in the neighbourhood, of what in hell am I thinking, what if an accident had happened, and how do i plan to get that piece of ***** home? Calm down, i live 2 km down the road nothing will happen, we won't do it again. So he drives off, and we are right in business again, just reattach the cars, and then head home.

Just as we're about to do that, another man comes by foot with his family. He seems to be nice, at first he semms to smile at this whole mess I'm in. I greet him, and he asks me what we did there. So i tell him the story minus the part where the glowplug shot out of the engine block. He then asks me if I am aware of how illegal what I'm doing is. I tell him no, (Hell yes I am aware of it, i just didnt think it would go THAT wrong) He then proceeds to tell me why exactly it is illegal, and then he casually throws in there that he's A EFFING COP My brain goes all like WTF...

Luckily he let us go without any form of punishment, wich i'm very grateful for and i told him that.
But part of the "no punishment" deal was to not pull it back home like this, even if it was just 2 km.
So i call somebody I know who has access to a trailer and ask him if he can tow it back. Thankfully he agreed, (I'm also very grateful for that, since I only know him casually, mostly because he is into old benzes too )

So there we are. Car back in the driveway, bit more broken than before.
And i learned that a lot can go wrong, but if you're lucky about the people you encounter and know, it won't be so bad

Oh and here's a pic of the glowplug:

So i sourced another glowplug, but i would appreciate input on what could have been wrong there, and if it maybe had anything to do with the rough black smoke?

Obviously the main problem was a faulty glowplug, but I don't want to take any risks

What could have been Wrong? Re-read Post #10. Maybe that previous owner overtightend the Glow Plugs.

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84 300D, 82 Volvo 244Gl Diesel

I had something similar once when I tried to remove an old glow plug from a friend's car me and my friend were working on. The top part with the loop remained in the engine, whilst the rest came out. My friend made a tool from a left-threader extractor: a ring was welded to it, so we could remove the remaining glow plug with a large fork. See the pictures below:





Now I realise we could have just started the engine (or rather, let the engine rotate on the starter engine).

These old glowers are prone to coming apart. Best to replace them all or upgrade to pencil type.

them big ole nuts, sure are easy to crank tight... someone must have reefed on it, and broken it loose in the center.

I LOVE the pencil plugs, but you've got to be GENTLE with the electrical nuts.

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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!

I really like them too, otherwise it would've probably been wise to just upgrade

Luckily the same guy who trailered me home has a lot of parts, and he gave me another glowplug, which, after some contact problems now works fine.

But working on an old benz is always a neverending story as many of you surely know

Now it's the starter, but luckily the problem seems to only be worn down brushes, which I will buy and install tomorrow, so it will hopefully live to die another day

Govert:

I don't understand how your glowplug broke off in that spot in the first place o_O

What would have also worked for you and your friend is one of those teleskope magnets, wich are really useful if you drop a nut or washer into something. Especially if it's dropped into the engine. Don't ask me how I know.

ugh, you must be in Germany

How do you know?

This makes a good case for Reaming or otherwise cleaning out the Carbon from the Glow plug Holes.

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84 300D, 82 Volvo 244Gl Diesel

It made a good case for not using Bosch loop glowers.

Also reaming out the glow plug hole still wouldn't help with an old glow plug which has been in there for years.

Magnets don't really worked, because the part of the glow plug was stuck into the engine. We removed the injector and tried to push the thing out, but that didn't work either.

I rebuilt the starter today, the most difficult part was soldering the brushes onto the old wires since i never soldered before, but it worked quite well.

Now the starter spins a lot faster, and it is possible to start the engine on one battery

Next problem to fix: Huge cloud of black smoke out back.

It most likely is the diaphragm in the injection pump since i have the most common symptom of diaphragm failure, that is oil in the vacuum line towards the intake.

Not an easy job, but what choice do i have /:

It is not impossible, but watch out for all the small parts inside the governor. If you can get hold of the axle bearings of the auxiliary mechanical governor, replace them too.

You need a dial measurement device to set the compensation path:





And here in reality, slightly improvised:



Read about replacing the membrane in the FSM/WIS and follow all the steps:

07.1 Diesel Injection System - OM616

there 07-215

Attaching the membrane to the control rod is the most complicated, certainly with the diesel pump still on the engine (and the engine in the car).

Thanks for the link, a lot of useful stuff in there


Oh and I forgot to mention something: glow plugs # 3 & 4 are bubbling when the engine runs... looks like they wanna be like their brother # 2

I'm probably gonna end up replacing them all anyways during the restauration.