In the event that you are alert of irregular signs on your vehicle, you are right to be concerned, because a car represents a massive annual budget and unexpected malfunctions don’t reduce the bill. So what if you find that you have a leaking injector on your Nissan Altima? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can bring on more severe engine trouble on your car, we thought we would produce this content page to help you confirm the failure of a leaking injector and handle it properly. To do this, we will initially look into the case of gasoline injectors and then at those of diesel injectors Nissan Altima.
Leaking injector on my petrol Nissan Altima
It is important to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two sort of engines makes the injection different. The key 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 Altima: The different leaks
It should be noted that injector leaks on a Nissan Altima equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Nevertheless, there are two sort 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 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 experience 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 Altima
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Nissan Altima: The different leaks
In the case of leaking diesel injectors on your Nissan Altima, there are three several sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform in the long run, 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 Altima 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 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 browse this content page on the presence of oil leaking on your Nissan Altima.
Leaking injector on my Nissan Altima, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen sooner, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some measures:
- 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.
Concerning the repair part of your leak, it will oftentimes be limited to replacing the seals that have failed:
- Discover the source of the leak
- Take apart 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 cases, these interventions are not specifically difficult, but if you have the slightest doubt in the treatment of your injector that leaks on your Nissan Altima, we encourage you to get closer to your mechanic to avoid any bad handling that could critically harm the condition of your Nissan Altima.
If you want more tutorials on the Nissan Altima, go to our Nissan Altima category.
