Whenever you are informed of abnormal signs on your vehicle, you are right to be preoccupied, because a car represents a huge annual budget and sudden breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Nissan Micra 4? You probably 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 signals of a leaking injector. As this problem can lead to more severe engine trouble on your car, we chose to compose this article to help you ensure the failure of a leaking injector and deal with it correctly. To do so, we will first of all take a look at the case of gasoline injectors and then at those of diesel injectors Nissan Micra 4.

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Leaking injector on my petrol Nissan Micra 4

It is crucial to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two types of engines makes the injection different. The key 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 Nissan Micra 4: The different leaks

It should be noted that injector leaks on a Nissan Micra 4 equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, there are two types 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 component that is connected 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 before.

Leaking injector on my diesel Nissan Micra 4

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 Micra 4: The different leaks

In the case of leaking diesel injectors on your Nissan Micra 4, there are three several types of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform along with time, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Nissan Micra 4 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 troublesome, 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 suggest you to consult this article on the existence of oil leaking on your Nissan Micra 4.

Leaking injector on my Nissan Micra 4, 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. Frequently a leak is linked, as we have seen sooner, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some measures:

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

  • Discover 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 respect with the manufacturer’s standards.

In all cases, these interventions are not necessarily complicated, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Nissan Micra 4, we suggest you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Nissan Micra 4.

To get more tips on the Nissan Micra 4, take a look at the Nissan Micra 4 category.