In the event you are aware of unusual symptoms on your automobile, you are right to be concerned, because a car represents a huge annual budget and sudden breakdowns don’t reduce the expenses. So what if you feel like you have a leaking injector on your Mercedes Classe B? You likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or strange black smoke. These three manifestations are the main signs of a leaking injector. As this problem can end up in more serious engine trouble on your car, we decided to compose this article content to help you confirm the failure of a leaking injector and treat it properly. To achieve this, we will first check out the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Classe B.
Leaking injector on my petrol Mercedes Classe B
It is fundamental to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two types of engines makes the injection distinct. The biggest difference lies in the pressure undergone by the injectors, on a petrol engine it will vary between 3.5 bars for indirect injection and 120 bars for indirect injection.
Leaking injector on a petrol Mercedes Classe B: The different leaks
It should be known that injector leaks on a Mercedes Classe B equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, there are two types of leaks:
- Leakage from the top of the injector:
It is possible that you have a leak from the top of the injector, this is the component that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may experience a leak coming from the lower portion of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Mercedes Classe B
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system generates very high pressure in the engine, as do the injectors. On these models, the pressure is more than 10 times higher than on the direct injection of car petrol engines, reaching 1800 to 2000 bars.
Leaking injector on diesel Mercedes Classe B: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Classe B, there are three several types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform as time passes, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Classe B will be a consequence of an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we recommend you to browse this article content on the presence of oil leaking on your Mercedes Classe B.
Leaking injector on my Mercedes Classe B, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen prior to this, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Regarding the repair part of your leak, it will oftentimes be limited to swapping the seals that have failed:
- Situate the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not inevitably very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Mercedes Classe B, we recommend you to get closer to your mechanic to avoid any bad manipulation that could severely harm the condition of your Mercedes Classe B.
If you want more tutorials on the Mercedes Classe B, go to our Mercedes Classe B category.
