In the event you are aware of unusual signs on your car, you are right to be concerned, because a car represents a huge annual budget and sudden malfunctions don’t reduce the costs. So what if you think that you have a leaking injector on your Mercedes Classe B 3? You most likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three manifestations are the main signals of a leaking injector. As this failure can produce more critical engine trouble on your car, we made a decision to write this article content to help you confirm the failure of a leaking injector and handle it correctly. To do so, we will first check out the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Classe B 3.
Leaking injector on my petrol Mercedes Classe B 3
It is crucial to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two types of engines makes the injection distinct. The main difference lies in the pressure experienced 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 3: The different leaks
It should be mentioned that injector leaks on a Mercedes Classe B 3 equipped with a petrol engine are rather infrequent. This is because of 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 conceivable that you have a leak from the top of the injector, this is the portion that is connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may experience a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mercedes Classe B 3
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 3: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Classe B 3, there are three different types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, generally the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Classe B 3 will be brought on by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most annoying, 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 checking you have oil leaking but it does not come from your injectors, we encourage you to browse this article content on the existence of oil leaking on your Mercedes Classe B 3.
Leaking injector on my Mercedes Classe B 3, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is completed…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will regularly be limited to changing the seals that have failed:
- Identify the source of the leak
- Dismantle 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 situations, these interventions are not necessarily difficult, but if you have the slightest doubt in the treatment of your injector that leaks on your Mercedes Classe B 3, we encourage you to get closer to your auto mechanic to avoid any bad handling that could critically harm the condition of your Mercedes Classe B 3.
To get more tips on the Mercedes Classe B 3, take a look at the Mercedes Classe B 3 category.
