Whenever you are informed of abnormal symptoms on your car, you are right to be intrigued, because a car represents a huge annual budget and unpredicted breakdowns don’t reduce the costs. So what if you feel as if you have a leaking injector on your Mercedes Classe V? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main symptoms of a leaking injector. As this problem can end up in more severe engine complications on your car, we decided to prepare this content page to help you confirm the failure of a leaking injector and deal with it properly. To do so, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Mercedes Classe V.
Leaking injector on my petrol Mercedes Classe V
It is vital to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two sort of engines makes the injection distinct. The essential 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 V: The different leaks
It should be known that injector leaks on a Mercedes Classe V 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 sort 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 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 part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mercedes Classe V
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 V: The different leaks
In the case of leaking diesel injectors on your Mercedes Classe V, there are three different sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, 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 V 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 experience 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 read this content page on the presence of oil leaking on your Mercedes Classe V.
Leaking injector on my Mercedes Classe V, how to fix the leak
And at last, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is linked, 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 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 changing the seals that have failed:
- Situate 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 accordance with the manufacturer’s standards.
In all cases, these interventions are not automatically difficult, but if you have the tiniest doubt in the treatment of your injector that leaks on your Mercedes Classe V, we encourage you to get closer to your repair shop to avoid any bad handling that could significantly harm the condition of your Mercedes Classe V.
To get more tips on the Mercedes Classe V, take a look at the Mercedes Classe V category.
