Whenever you are informed of irregular symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and sudden malfunctions don’t lower the expenses. So what if you sense that you have a leaking injector on your Nissan Murano? You probably figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can bring about more significant engine concerns on your car, we thought we would produce this content to help you verify the failure of a leaking injector and handle it correctly. To do so, we will first check out the case of gasoline injectors and then at those of diesel injectors Nissan Murano.


Leaking injector on my petrol Nissan Murano

It is important 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 biggest 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 Murano: The different leaks

It should be noted that injector leaks on a Nissan Murano equipped with a petrol engine are rather 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 part 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 portion 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 Nissan Murano

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 Murano: The different leaks

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

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform as time passes, 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 Nissan Murano 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 read this content on the existence of oil leaking on your Nissan Murano.

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

And finally, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen previously, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is enormous, specifically 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 frequently be restricted to changing the seals that have failed:

  • Identify the source of the leak
  • Take apart the injector in question
  • Change the corresponding seal kit
  • Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.

In all situations, these interventions are not automatically complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Nissan Murano, we encourage you to get closer to your auto mechanic to avoid any bad manipulation that could severely harm the condition of your Nissan Murano.

If you have any additional questions about the Nissan Murano, do not hesitate to consult our Nissan Murano category.