Whenever you are aware of abnormal signs on your vehicle, you are right to be preoccupied, because a car represents a huge annual budget and unpredicted breakdowns don’t lower the expenses. So what if you feel like you have a leaking injector on your Mercedes Classe E? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unusual black smoke. These three manifestations are the main symptoms of a leaking injector. As this problem can produce more serious engine problems on your car, we made a decision to prepare this content page to help you ensure the failure of a leaking injector and treat it properly. To accomplish this, we will first check out the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Classe E.
Leaking injector on my petrol Mercedes Classe E
It is crucial to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two sort of engines makes the injection different. 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 E: The different leaks
It should be said that injector leaks on a Mercedes Classe E equipped with a petrol engine are pretty rare. This is due to the much lower pressure in the petrol intake systems. Even so, there are two sort 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 portion that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may suffer a leak coming from the lower part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Mercedes Classe E
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 E: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Classe E, there are three different sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform after a while, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Classe E 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 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 recommend you to browse this content page on the presence of oil leaking on your Mercedes Classe E.
Leaking injector on my Mercedes Classe E, how to fix the leak
And to finish, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen previously, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is conducted…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Concerning the repair part of your leak, it will frequently be limited 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 set up and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all cases, these interventions are not automatically very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Mercedes Classe E, we recommend you to get closer to your mechanic to avoid any bad manipulation that could seriously harm the condition of your Mercedes Classe E.
To find more tips on the Mercedes Classe E, take a look at the Mercedes Classe E category.
