In cases where you are aware of unusual symptoms on your vehicle, you are right to be concerned, because a car represents a massive annual budget and unpredicted malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Nissan NV? You likely figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or abnormal black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can bring on more serious engine problems on your car, we decided to publish this content page to help you validate the failure of a leaking injector and treat it correctly. To do this, we will initially look into the circumstance of gasoline injectors and then at those of diesel injectors Nissan NV.
Leaking injector on my petrol Nissan NV
It is essential to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two types of engines makes the injection distinct. The essential 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 NV: The different leaks
It should be said that injector leaks on a Nissan NV 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 possible that you have a leak from the top of the injector, this is the part that is attached 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 come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Nissan NV
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 NV: The different leaks
In the circumstance of leaking diesel injectors on your Nissan NV, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform with time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Nissan NV 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should experience an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we recommend you to read this content page on the presence of oil leaking on your Nissan NV.
Leaking injector on my Nissan NV, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen prior to this, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some safety measures:
- 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.
Concerning the repair part of your leak, it will regularly be limited to replacing the seals that have failed:
- Locate 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 respect with the manufacturer’s standards.
In all situations, these interventions are not inevitably very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Nissan NV, we recommend you to get closer to your auto technician to avoid any bad manipulation that could critically harm the condition of your Nissan NV.
Whenever you have any further questions about the Nissan NV, do not hesitate to consult our Nissan NV category.
