The vent valve will need cleaning out , but if there is no change , then you will need to replace it

 

The vent valve will need cleaning out , but if there is no change , then you will need to replace it

Hi plinker17722,

thanks for the suggestion but in the scheme I can’t see the vent Valve

Thanks

Andrea

Inviato dal mio iPhone utilizzando Tapatalk

 

Has this problem been solved? I’m having the same problem!

 

Hi StofDD,

I’m working on it. Updates will follow shortly.

A.


Inviato dal mio iPhone utilizzando Tapatalk

 

Problema yra „garų magistralės valymo solenoide“

sveiki, gal gali duot daugiau info
Albertas

 

sveiki, gal gali duot daugiau info
Albertas

 

Man tai pavyko

Sveiki
pasakykite man, ką
problema

Ačiū



ačiū

 

Hi is this problem resolved?Have the same problem on my B class W246

 

Hi! I have the exact same problem, what was wrong? I haven't found the problem.. MB 180 B-class

 

The last 8 posts didn't fill in their profile..so who knows what car, what engine,..and/or what location...?...Who knows..?

 

Discussion Starter · #1 · Jul 20, 2021

Good morning,

my B180 1.8CDI BLUEFFICENCY 80KW AUTOMATIC

 

Good morning,

my B180 1.8CDI BLUEFFICENCY 80KW AUTOMATIC literally started to "throw up" diesel from the tank cap.
I was stopped waiting for a friend, car running to keep the air conditioning on, when I got out I noticed that droplets of diesel were falling from the cap. I instinctively opened the cap, to understand what had happened and as soon as I opened the cap the car literally started throwing up diesel fuel, I then closed it promptly, and I lost a few liters ... I turned off the car and waited a few minutes, so I tried again to open the cap and again the diesel started to come out. The tank was full with about 50L of diesel, and after trying to open it twice I think I will have lost at least ten (10) liters ...
It seems that there is a high pressure inside the tank that causes the diesel to escape.

Have you ever had similar experiences?
This is a video of the problem:

Thanks for your advice,

Andrea

Hi Andrea, i am having the same problem with my b200 1.8 cdi (2014). I have 165.000 km by now and i recently cleaned up one of engines beck. My car was at full stop and i noticed a leaking under my cars engine. Mercedes technicians told my that it was my 4th beck that was leaking. After searching farther while trying to depressurised the system we opened the cup and happened the same thing! Fuel came out like your video.
It would be so helpful if you share with us were did you spot the problem and how did you fix it.
Thank U in advance

 

Ok found it. (OEM A0025407097) thanks again.

 

Hello. Did you guys solve the problem? Was it the valve?

 

 

Hi I actually have the same issue too. The car is at the garage right now with them trying to identify the issue. As you state I don't think my car has the valve as such... it's throwing diesel out the filler and leaking from the front too...

looking for some help with this issue it appears to be quite common. It's quite scary to see fuel coming back out the filler hole.


----------- edit -----
Just to add to this. They have released all of the injectors so the pressure shouldn't be cycling back into the tank...

the issue however is still present and they are saying there is definitely some sort of breather or valve which is the issue? Can anyone advise , possible location? Or fix where the start? Thanks

 

This may help

 

mroliverpower



If you could do all the potential readers a favor,
Please complete your BW registration profile so members may better assist you, seeing and knowing what you drive.

Goto your ===> user CP profile====> click on your icon (top right corner of the webpage) ----> then click on "Account Settings"----> goto Account Details----> add vehicle details---->
ADD your make model YEAR (i.e. 01 ml320) into your Profile ----> (MUST) click save at the bottom of that page.
YOUR vehicle info will then show/display under your username & avatar (on the left side) once it is completed. If it doesn't display under your Avatar, it wasn't saved.

Members will then see your avatar car info & know what you drive if replying.

 

This issue didn't work fyi. Any other members able to advise. They've had the fuel tank off and the wheel arches...

They say it's some sort of breather in the engine? Anyone...

 

This issue didn't work fyi. Any other members able to advise. They've had the fuel tank off and the wheel arches...

They say it's some sort of breather in the engine? Anyone...

I got my b180 from shop back on monday. They found 2/4 leaking injectors and vorn out tips in all of the 4 injectors. I have in my odometer 178tkm. No more bubbling in the tank .

 

Salut Cride quand tu dis bouillonner tu veux dire revenir par le remplissage et fuir ?
Merci beaucoup.
[/CITATION]J ai le même problème à ma voiture bw246 de 2022 180 cdi Le problème etait une fuite au injecteurs ?

 

Cride including christophenobels Please red post 43, as per forum rules .

 

hi all, had the exact same problem, replaced the valve between the engine spreaders and replaced the injector return pipe, made no difference, it pressurised again after refueling. found this page and got the injectors checked, no 3 had a leak on the seat, no 4 was replaced, no more pressure in the tank, but since that the car ticks over fine, but revving it causes the engine to run on even when turned off with the key, since it pressurised the 2nd time fuel has gone through the exhaust and intercooler, the diesel has been drained as much as possible but still lots of smoke and the run on issue still persists. anyone have any idea why or what to do next ? the garage are stumped at the moment to why its still doing it

many thanks

 

Thanks for explaining what you did find out ..now best of luck on the remaining problem. BTW..I don't have that B or engine and can't help here.

 

salam mendede eyni problem var bu problemi hell etmisen problem nedi bilmek istedim

 

Try google translate....and please "fill in your profile"..by clicking on the blue below....hit save at the end..

Welcome to the forum !
The forum index is organized / grouped according to Mercedes chassis designation, usually one letter followed by 3 digits / numbers, and the section covers all engine / versions the chassis came with.

To find the forum section = chassis for your car, please click FIND YOUR FORUM SECTION

And Complete your Profile by adding the year???? and model????? of your car, so it will show next to every future post under your avatar.
Members are not likely to search for the one post the model of the car is mentioned.

The forum section archives have a wealth of DIY / technical information.
When researching an issue / posting, you can also Search the forum archives of your chassis section via the 'Search Community' box on top..

The stickies on top of the 'Welcome' section will help to navigate the site.

 

Problem solved..: the problem is really this: The inlet/filler neck to the diesel tank coms into the tank at the lower 1/4 of the tank - and the eir has to vent out a breather on top of the tank. this breather is closed by a floater with a membrane at the top, and a little spring also giving some lift towards closure. This closing mechanism is too strong or seals too well, and the only way the tank can breath when this is closed - is through the filler neck, which comes out of the tank at 1/4 - meaning diesel is pushed out.. How we solved this.. We took the tank down, (not too much of a job) and took the tank armature/pump out of the tank. then we could see a white plastic thing at inside end of the breather line, and we could easily remove a lid at the end of it, and get the floater with the membrane on top of it out. I choosed to throw the spring away, and I also made a small cut to the membrane - which ensures a small leakage thath prevents pressure to build up. One could also conside just to push a needle through it. This solved the problem on our car. I could also mention that we did a lot of testing on the breather when we had the tank down. And we could easily recreate the problem - breather sucked stuck and only way to breathe was through filler neck.. What a mess, and what a poor design! One have been quite remote to reality to design a fuel tank with the inlet coming in from down under.. Good luck you all! greetings from Norway - sorry about my poor English - it is not my first/main langague.

 

Hello ! Thank you such much for this ! By any change, did you take any picture of the component in question ? Is it part of the pump assembly or a separate part ? It is inside of the pump ?

 

Your English was GREAT..and many thanks for the needed details for our B CDI members here.