In the event that you are informed of abnormal symptoms on your car, you are right to be concerned, because a car represents a massive annual budget and unforeseen breakdowns don’t lower the expenses. So what if you find that you have a leaking injector on your Nissan Armada? You most likely figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three manifestations are the main symptoms of a leaking injector. As this troubles can end up in more significant engine concerns on your car, we thought we would produce this content page to help you validate the failure of a leaking injector and deal with it correctly. To accomplish this, we will first look at the case of gasoline injectors and then at those of diesel injectors Nissan Armada.

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Leaking injector on my petrol Nissan Armada

It is fundamental to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two types of engines makes the injection different. The biggest 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 Nissan Armada: The different leaks

It should be noted that injector leaks on a Nissan Armada equipped with a petrol engine are pretty infrequent. This is caused by the much lower pressure in the petrol intake systems. Even so, there are two types 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 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 part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Nissan Armada

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 Nissan Armada: The different leaks

In the case of leaking diesel injectors on your Nissan Armada, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform over time, in most cases 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 Nissan Armada will be caused by an O-ring or its plastic tip that leaks.
  • Injector base leak:
    This injection leak is one of the most bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should encounter an air noise and a compression loss.
  • If after examining you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the presence of oil leaking on your Nissan Armada.

Leaking injector on my Nissan Armada, how to fix the leak

And at last, we’re going to look at how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen previously, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some safety 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.

Regarding the repair part of your leak, it will oftentimes be limited to replacing 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 necessarily complex, but if you have the smallest doubt in the treatment of your injector that leaks on your Nissan Armada, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could severely harm the condition of your Nissan Armada.

If you want more tutorials on the Nissan Armada, go to our Nissan Armada category.