In the event you are aware of unusual symptoms on your vehicle, you are right to be preoccupied, because a car represents a massive annual budget and sudden malfunctions don’t reduce the expenses. So what if you sense that you have a leaking injector on your Nissan Qashqai? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three manifestations are the main indicators of a leaking injector. As this failure can bring about more serious engine concerns on your car, we made a decision to prepare this content page 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 circumstance of gasoline injectors and then at those of diesel injectors Nissan Qashqai.

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Leaking injector on my petrol Nissan Qashqai

It is fundamental to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two sort of engines makes the injection distinct. The main 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 Qashqai: The different leaks

It should be known that injector leaks on a Nissan Qashqai equipped with a petrol engine are rather infrequent. This is because of 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 possible that you have a leak from the top of the injector, this is the component that is linked to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, you may encounter 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 Qashqai

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 Qashqai: The different leaks

In the circumstance of leaking diesel injectors on your Nissan Qashqai, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform with time, 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 Nissan Qashqai 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 feel an air noise and a compression loss.
  • If after checking you have oil leaking but it does not come from your injectors, we suggest you to browse this content page on the existence of oil leaking on your Nissan Qashqai.

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

And at last, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen sooner, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is carried out…
  • 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 oftentimes be limited to swapping the seals that have failed:

  • Discover the source of the leak
  • Dismantle 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 inevitably difficult, but if you have the slightest doubt in the treatment of your injector that leaks on your Nissan Qashqai, we suggest you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Nissan Qashqai.

To find more tips on the Nissan Qashqai, take a look at the Nissan Qashqai category.