In cases where you are informed of unusual signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and surprising breakdowns don’t lower the expenses. So what if you sense that you have a leaking injector on your Kia E Niro? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can end up in more severe engine concerns on your car, we made a decision to write this content page to help you ensure the failure of a leaking injector and treat it correctly. To do so, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Kia E Niro.

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Leaking injector on my petrol Kia E Niro

It is vital to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two kind of engines makes the injection different. The main 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 Kia E Niro: The different leaks

It should be said that injector leaks on a Kia E Niro equipped with a petrol engine are rather rare. This is as a result of the much lower pressure in the petrol intake systems. Nevertheless, there are two kind of leaks:

  • Leakage from the top of the injector:
    It is plausible that you have a leak from the top of the injector, this is the part 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 appear from the junction with the engine and not with the rail as seen previously.

Leaking injector on my diesel Kia E Niro

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Kia E Niro: The different leaks

In the case of leaking diesel injectors on your Kia E Niro, there are three different kind 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 suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Kia E Niro will be caused 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 feel an air noise and a compression loss.
  • If after checking you have oil leaking but it does not come from your injectors, we advise you to consult this content page on the existence of oil leaking on your Kia E Niro.

Leaking injector on my Kia E Niro, how to fix the leak

And finally, we’re going to take a look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is carried out…
  • Masking 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 frequently be restricted to replacing the seals that have failed:

  • Find out 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 respect with the manufacturer’s standards.

In all cases, these interventions are not automatically difficult, but if you have the smallest doubt in the treatment of your injector that leaks on your Kia E Niro, we advise you to get closer to your repair shop to avoid any bad manipulation that could critically harm the condition of your Kia E Niro.

In the event that you have any additional questions about the Kia E Niro, do not hesitate to consult our Kia E Niro category.