In the event you are informed of abnormal signs on your car, you are right to be concerned, because a car represents a big annual budget and unexpected malfunctions don’t reduce the bill. So what if you find that you have a leaking injector on your Kia Niro? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three signs of illness are the main indicators of a leaking injector. As this failure can bring about more critical engine concerns on your car, we thought we would publish this article content to help you verify the failure of a leaking injector and treat it properly. To do this, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Kia Niro.

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Leaking injector on my petrol Kia Niro

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 types of engines makes the injection distinct. 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 Niro: The different leaks

It should be said that injector leaks on a Kia Niro equipped with a petrol engine are pretty rare. This is because of 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 conceivable that you have a leak from the top of the injector, this is the portion that is attached 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 portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Kia Niro

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

In the circumstance of leaking diesel injectors on your Kia Niro, there are three different types of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform in the long run, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Kia Niro 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss.
  • If after examining you have oil leaking but it does not come from your injectors, we recommend you to read this article content on the presence of oil leaking on your Kia Niro.

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

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

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

  • Find out the source of the leak
  • Take apart 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 necessarily complex, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Kia Niro, we recommend you to get closer to your auto technician to avoid any bad manipulation that could critically harm the condition of your Kia Niro.

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