Whenever you are alert of unusual symptoms on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unpredicted malfunctions don’t lower the expenses. So what if you sense that you have a leaking injector on your Nissan Maxima? You most likely 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 signals of a leaking injector. As this failure can bring about more significant engine concerns on your car, we chose to publish this content page to help you verify the failure of a leaking injector and treat it properly. To do so, we will first take a look at the circumstance of gasoline injectors and then at those of diesel injectors Nissan Maxima.
Leaking injector on my petrol Nissan Maxima
It is vital to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two types of engines makes the injection different. The biggest 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 Maxima: The different leaks
It should be said that injector leaks on a Nissan Maxima equipped with a petrol engine are pretty rare. This is as a result of the much lower pressure in the petrol intake systems. However, 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 attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may experience 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 before.
Leaking injector on my diesel Nissan Maxima
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 Maxima: The different leaks
In the circumstance of leaking diesel injectors on your Nissan Maxima, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, generally the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Nissan Maxima 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 experience an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the existence of oil leaking on your Nissan Maxima.
Leaking injector on my Nissan Maxima, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen previously, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is achieved…
- Masking 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 frequently 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 inevitably very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Nissan Maxima, we encourage you to get closer to your motor mechanic to avoid any bad handling that could critically harm the condition of your Nissan Maxima.
If you want more tutorials on the Nissan Maxima, go to our Nissan Maxima category.
