Black death ? Possible tool to clean

[Bigbossmonty]

Hi,
Have vito diesel and wondering about black death. Fisrt of all I am disabled so will be a real pain to work on it. Vito runs well pulls like a train, problem being getting fumes in cab.
I am getting ready to look under the bonnet and see if theres any BD. Have watched 100,s of videos on BD. Regards oven cleaner it was mentioned they had no problems with Mr Muscle as its only on for a period of time.
I have new bolts , picks etc but I have a nice multi tool and have small 12 mm wide blades and was thinking being very carefull this could help cut away the crap.
Any thoughts would be appreciated, 140K miles.
Many thanks in advance
BBM

 

[StMarks]

Hi,
Have vito diesel and wondering about black death. Fisrt of all I am disabled so will be a real pain to work on it. Vito runs well pulls like a train, problem being getting fumes in cab.
I am getting ready to look under the bonnet and see if theres any BD. Have watched 100,s of videos on BD. Regards oven cleaner it was mentioned they had no problems with Mr Muscle as its only on for a period of time.
I have new bolts , picks etc but I have a nice multi tool and have small 12 mm wide blades and was thinking being very carefull this could help cut away the crap.
Any thoughts would be appreciated, 140K miles.
Many thanks in advance
BBM

Fwiw I did mine at around the same mileage, for precisely the same reason. I personally didn't use a dremmel or multitool. I carefully used a selection of chisels and scrapers, together with a vacuum cleaner adapted to suck through an 8mm piece of pipe.
I read too many instances of disasterous diy failures, when removing the injectors. So when it was all clear I took mine to the Mercedes dealers to remove and re-seat. Yes: "expensive", but less so than some of the consequences I had read about.
Hth, and best of luck.

 

[Bigbossmonty]

Fwiw I did mine at around the same mileage, for precisely the same reason. I personally didn't use a dremmel or multitool. I carefully used a selection of chisels and scrapers, together with a vacuum cleaner adapted to suck through an 8mm piece of pipe. I read too many instances of disasterous diy failures, when removing the injectors. So when it was all clear I took mine to the Mercedes dealers to remove and re-seat. Yes: "expensive", but less so than some of the consequences I had read about. Hth, and best of luck.

 

[Bigbossmonty]

Hi
Thanks for the responce much appreciated.
Will need to get to it as its wasting my enjoyment of the van. Just passed 12 months in march no advisories . Not worried about doing the work trained as Mech engineer. Just will take me a lot longer than I was capable off before disability - spinal.
Had a quote to replace the injector seals from merc specialist £120 +vat each. So getting out there in price. I will persevere doing it as van is not used daily except when wifes car breaks down (this week) .
Thanks again
Bbm

 

[KeithDee]

I had BD on a Vauxhall Movano (Renault Master 2.5) number 1 injector seal. I got the engine hot which softened the BD then used carb throttle body cleaner which melts the BD. Using various size screw divers ect keeping the engine hot, carb cleaner and perseverance it wasnt a bad job to do.

 

[KeithDee]

Few vid screenshots, first pic is the glow plug connector

 

[Bigbossmonty]

 

[Petrol Pete]

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[ChipChop]

Makes you wonder why Mercedes did not stick to the threaded screw in fitment injectors they used in all the pre CDI OM engines.

 

[Petrol Pete]

Makes you wonder why Mercedes did not stick to the threaded screw in fitment injectors they used in all the pre CDI OM engines.

Lot's of things MB do make me wonder too !

 

[chic0821]

Excuse my ignorance, looks horrendous, what causes that. Just interested

 

[StMarks]

Excuse my ignorance, looks horrendous, what causes that. Just interested

Fwiw when I discovered that my engine cover was filled with what looked like solid road tar, I asked precisely the same,,,,
Apparently it's the residue that is left when diesel fuel that leaks past the injector seals evaporates due to the heat from the running engine.

Makes you wonder why Mercedes did not stick to the threaded screw in fitment injectors they used in all the pre CDI OM engines.

I also asked anyone I could why injectors aren't "threaded in like spark plugs". Best answer I recall was that apparently due to the longer maintenance period, and greater build up of deposits, they would have a tendency to be too seized to remove without destruction.
Don't know how true that was, but I suppose it sounds plausible ?

 

[ChipChop]

I also asked anyone I could why injectors aren't "threaded in like spark plugs". Best answer I recall was that apparently due to the longer maintenance period, and greater build up of deposits, they would have a tendency to be too seized to remove without destruction.
Don't know how true that was, but I suppose it sounds plausible ?

The obvious difference is pre CDI Mercedes diesels are indirect injection with a pre-chamber arrangement whereas CDi's are direct injection. maybe you are right and the injector being next to the point of explosion in CDi engines precludes a screw in fixing.
For what it is worth i know someone who removed the threaded injectors from an 190d's indirect injection OM602 diesel engine so Monarch nozzles could be fitted and they came out no problem whatsoever. Done a couple of glow plug changes over the years in my w201 diesel and no problems there either.