ML 270 Cdi Black Death of Injectors

[spraydizzy]

How much metal did you remove when you recut the seats, you are only meant to clean the carbon off and and stop as soon as you see the first signs of alloy. If you have removed too much you will probably find that you would need 2 to washers as the clamp would not be able to pull the injector down tight enough to stop it leaking.
If there are signs of coolant then you might have pierced the water way under the bolts. Fitting 2 washers will not cause it to smoke, i have had to do that before as a stop gap while waiting for a new head and it didn't cause any smoking or make any difference to how the engine ran, you are only talking of raising the injector by a few thou. I would tend more towards it been some crap stuck in one of the injectors from when you removed them.

Martin

Hi Martin

Now you mention it I don't think i used the seating tool enough as i didn't want to remove too much material, I just removed the carbon and stopped.
I had all the injectors professorially cleaned and checked prior to fitting can the extra washers be causing the smoke by the now incorrect positioning ?
is the water jacket the head gasket? and if its now damaged what problem dose it cause?

Panason1c has said the injectors should not have two washers

 

[spraydizzy]

The excess smoke/poor running is due to the injectors not in the correct position due to using 2 washers.

Hope the new maf was a genuine item and not from ebay, ebay mafs are reported to be a bit dodgy as some of them are Chinese copies and dont always work as they should.

Hi Panason1c

Yes the MAF is new from eBay seems to be working correctly ?
I think it was a Euro part jobby
what is the walk throu for getting these injectors in with one washer and not leaking ?

 

[walsi]

Hi ya, you should only fit one washer under the injectors but the increase in height with 2 is minimal so shouldn't make any difference. There is a water way below where the stretch bolts go and you have to be careful that you don't pierce it by using too longer a bolt or when you drill and fit helicoils if you have a stripped thread.
If you have had the injectors re-conned or serviced i would go back to them and point out it is smoking, it might be to do what they have done, you wouldn't be the first to have problems with serviced injectors.
If you didn't recut the seats good enough (its difficult to know what is enough) this might explain them leaking when you replaced them and needing two washers, i would think it was diesel you had leak and not water.

Martin

 

[panason1c]

I believe that fitting two washers would cause problems, the injection design tolerances are very fine and any deviation, such as altering the height of the injectors, will have an effect on the spray pattern which would cause an incorrect burn imo.


If the seats hadnt been cleaned properly and if it was diesel fuel leaking past the seals then it would have been accompanied by a very, very noticable 'chuffing' sound, and the diesel fuel would be pushed/sprayed out of the injector/head recess the cylinder pressure..

 

[walsi]

If the seats hadnt been cleaned properly and if it was diesel fuel leaking past the seals then it would have been accompanied by a very, very noticable 'chuffing' sound, and the diesel fuel would be pushed/sprayed out of the injector/head recess the cylinder pressure..[/QUOTE]

They dont spray fuel out with leaking seals, i have seen it just bubble around the seat on many occasions with no chuffing sound. They can be real bad and chuff and spit a bit but most of the time it is just a small bubbling around the base.
Fitting 2 washers won't alter the spray pattern because the injector doesn't sit flush with the head, it protudes into the head. All it will do is lower the compression by a miniscule amount.

Martin

 

[dav007]

hi there i have the same problem as his were is the best place to get the copper washers and o rings from

and whats the best staff to get rid of the black volcanic like resin

 

[walsi]

Washers come from merc, only a few pence. There are all sorts of things suggested for carbon removal with the main one been plenty of time. I have tried various things over the year but i like using oven cleaner, others prefer anything from petrol to thinners and even WD40.
Just go steady and most of all be careful especially with any wiring because it will be brital and it is easy to break the inner wiring.
Allways warm the engine to full operating temp before trying to remove the injectors. Keep the area spotless, i use a an industrial hoover with a small home made nozzle to keep the work area clean. Clean the stretch bolt holes before refitting the bolts and you must recut the injector seats otherwise there is no point in doing the job. New stretch bolts come from merc aswell.

Martin

 

[Mercsys]

hi there i have the same problem as his were is the best place to get the copper washers and o rings from

and whats the best staff to get rid of the black volcanic like resin

Hi acetone will dissolve this goop and most other things to, paint finish included, it is highly flammable and a low boiling point so only use on a stone cold engine. Use with extreme caution, no open containers, metal containers (static discharge)...

Start by chipping the lumps away with hard plastic chisel like tool, vacuum the debris away, then use the solvent to finish.

Never vacuum the solvent away, it could cause the vacuum system to explode and then catch fire!

J

 

[walsi]

Not picking an argument but the flammable part would have evaporated before you get a hoover near it, thats why they use extraction systems in spray booths and any where else where it is used which are giant hoovers and they don't explode

Martin

 

[Mercsys]

... industrial fume cabinets and spray booths have the motors separate form the vented load and would also have Ex rated explosion proof motors, this is not the case with small portable vacuum units where the filtrate air is commonly used to cool the brushed motor.

I thought I would mention this as they make a big mess when they do go up, and I have no way of knowing the users familiarity with flammable solvents, also a vacuum was mentioned earlier in this thread.

J

 

[walsi]

Ours hasn't got a separate motor, the motor is mounted right on top of the main fan in the extraction line and the small spray booth is exactly the same. I have often wondered about it been a fire hazard with all the fumes being dragged through the motor but we have never had a problem. Maybe design has changed a bit in newer gear

Martin

 

[dav007]

hi martin and j thanks for the info what will i use to cut the seats

 

[walsi]

You can buy or hire the seat cutting tool online or see if a local garage or diesel specialist will loan you one. It not the sort of thing you would probably need again if they are done right but if you plan on owning mercs for the rest of your days then it will be a good investment.

Martin

 

[dav007]

hi is there a tool i need to get the injectors out

 

[AR Merc]

Red coolent water leaking from the injector clamping bolt area

Hi All,
please help!!!!

I had my rocker cover/tappet broken form the top,after buying this car recently from a seller but the Man advertised like the following:

the car has just had one new injector fitted as
well as 4 new injector seals,
Two new rear springs
and one new shock absorber
the only down points are if you put your foot
hard to the floor it sometimes cuts out this does not happen if
driven normaly,I have been told it needs the new injector
programed in by a garage,
Please note the car drives perfectly even if driven hard.​

on the motor way when i was driving car was cutting off and EPC came up on the dash bord,happend several times then smoke start coming,and when i checked the oil have flashed all over due to rocker cover broken from above the timing chain,so i have to get the car towed home.
Fixing bit: i still dont know what is the cause from the sellers info and my bad experience on the mottor way.
Anyhow ordered Rocker cover + gasket+copper washer from the dealer £230 after fixing them all now the coolent water(Red)coming out from the Fuel injector clamping bolt near to the timing chain(first from me the fifth from the windscreen).
Is it worth to go for a new ENGINE or should i guys still find a cheap way to fix this problem and how please input your Advices i am sure most of guys here are Much experienced and better machanical mined.

Please Help!!!!!!
Cheers​

 

[panason1c]

Hi All,
please help!!!!

I had my rocker cover/tappet broken form the top,after buying this car recently from a seller but the Man advertised like the following:

the car has just had one new injector fitted as
well as 4 new injector seals,
Two new rear springs
and one new shock absorber
the only down points are if you put your foot
hard to the floor it sometimes cuts out this does not happen if
driven normaly,I have been told it needs the new injector
programed in by a garage,
Please note the car drives perfectly even if driven hard.​

on the motor way when i was driving car was cutting off and EPC came up on the dash bord,happend several times then smoke start coming,and when i checked the oil have flashed all over due to rocker cover broken from above the timing chain,so i have to get the car towed home.
Fixing bit: i still dont know what is the cause from the sellers info and my bad experience on the mottor way.
Anyhow ordered Rocker cover + gasket+copper washer from the dealer £230 after fixing them all now the coolent water(Red)coming out from the Fuel injector clamping bolt near to the timing chain(first from me the fifth from the windscreen).
Is it worth to go for a new ENGINE or should i guys still find a cheap way to fix this problem and how please input your Advices i am sure most of guys here are Much experienced and better machanical mined.

Please Help!!!!!!
Cheers​

What area are you in?........you need to visit an indie near to you.

 

[AR Merc]

Hi ......In Leicester
Any advice ...pls.

 

[panason1c]

It sounds to me that the car needs to be seen to determine the faults, hopefully, someone will come on who can recommend an indie close to where you live who can have a look for you.

 

[AR Merc]

Thank You,,,Hope its not a long wait...Thanks for prompt reply.

 

[panason1c]

Just seen this post (below) on another thread........might be worth contacting 'Star motors' as the prices quoted seem reasonable.


just booked the c220 in for a service B next week. just wanted to know if the prices ive been quoted are decent.

service B - £170 + vat

Autobox fluid and filter replace - + £140 + vat

aircon regas £35 + vat

provided by a company called star motors in little Leicester who specialise in mercedes only.