In the event you are informed of abnormal signs on your car, you are right to be preoccupied, because a car represents a massive annual budget and unpredicted malfunctions don’t lower the expenses. So what if you find that you have a leaking injector on your Mercedes Classe E 5? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three manifestations are the main signs of a leaking injector. As this failure can end up in more critical engine trouble on your car, we thought we would prepare this content to help you validate the failure of a leaking injector and deal with it correctly. To achieve this, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Mercedes Classe E 5.
Leaking injector on my petrol Mercedes Classe E 5
It is vital to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two kind of engines makes the injection different. The key 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 E 5: The different leaks
It should be known that injector leaks on a Mercedes Classe E 5 equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. However, there are two kind of leaks:
- Leakage from the top of the injector:
It is plausible that you have a leak from the top of the injector, this is the component that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may suffer 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 before.
Leaking injector on my diesel Mercedes Classe E 5
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure produces 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 E 5: The different leaks
In the case of leaking diesel injectors on your Mercedes Classe E 5, there are three several kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform in the long run, commonly the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Classe E 5 will be caused 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 feel an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this content on the existence of oil leaking on your Mercedes Classe E 5.
Leaking injector on my Mercedes Classe E 5, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen sooner, to a worn seal caused by the pressures endured. 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 achieved…
- 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 frequently be restricted to swapping the seals that have failed:
- Find out the source of the leak
- Take apart the injector in question
- Replace 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 complicated, but if you have the slightest hesitation in the treatment of your injector that leaks on your Mercedes Classe E 5, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could seriously harm the condition of your Mercedes Classe E 5.
If you want more tutorials on the Mercedes Classe E 5, go to our Mercedes Classe E 5 category.
