In the event that you are alert of abnormal signs on your automobile, you are right to be concerned, because a car represents a huge annual budget and surprising malfunctions don’t lower the costs. So what if you feel like you have a leaking injector on your Mercedes Vito? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can lead to more significant engine trouble on your car, we thought we would compose this content to help you confirm the failure of a leaking injector and treat it properly. To accomplish this, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Mercedes Vito.

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Leaking injector on my petrol Mercedes Vito

It is essential to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two kind of engines makes the injection distinct. The biggest 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 Vito: The different leaks

It should be said that injector leaks on a Mercedes Vito equipped with a petrol engine are pretty rare. This is as a result of the much lower pressure in the petrol intake systems. Even so, there are two kind 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 part 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 previously.

Leaking injector on my diesel Mercedes Vito

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 Vito: The different leaks

In the case of leaking diesel injectors on your Mercedes Vito, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform as time passes, generally 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 Vito will be the result 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 feel 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 content on the existence of oil leaking on your Mercedes Vito.

Leaking injector on my Mercedes Vito, how to fix the leak

And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is linked, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some measures:

  • Lower the pressure before any work is achieved…
  • 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 restricted to swapping the seals that have failed:

  • Find the source of the leak
  • Take apart the injector in question
  • Change 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 inevitably very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Mercedes Vito, we encourage you to get closer to your mechanic to avoid any bad manipulation that could seriously harm the condition of your Mercedes Vito.

If you have any additional questions about the Mercedes Vito, do not hesitate to consult our Mercedes Vito category.