Whenever you are informed of unusual signs on your car, you are right to be concerned, because a car represents a huge annual budget and unforeseen malfunctions don’t lower the costs. So what if you feel like you have a leaking injector on your Nissan Frontier? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main signs of a leaking injector. As this troubles can cause more critical engine concerns on your car, we thought we would prepare this article to help you validate the failure of a leaking injector and treat it correctly. To accomplish this, we will first look into the case of gasoline injectors and then at those of diesel injectors Nissan Frontier.
Leaking injector on my petrol Nissan Frontier
It is crucial to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two sort of engines makes the injection different. The main 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 Frontier: The different leaks
It should be noted that injector leaks on a Nissan Frontier equipped with a petrol engine are pretty rare. This is resulting from 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 possible that you have a leak from the top of the injector, this is the component that is connected 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 before.
Leaking injector on my diesel Nissan Frontier
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 Frontier: The different leaks
In the case of leaking diesel injectors on your Nissan Frontier, there are three different sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, usually the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Nissan Frontier 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 annoying, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel 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 consult this article on the existence of oil leaking on your Nissan Frontier.
Leaking injector on my Nissan Frontier, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Regularly 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 tremendous, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is achieved…
- 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 very often be limited to swapping the seals that have failed:
- Identify the source of the leak
- Dismantle the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all cases, these interventions are not automatically difficult, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Nissan Frontier, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could severely harm the condition of your Nissan Frontier.
If you have any additional questions about the Nissan Frontier, do not hesitate to consult our Nissan Frontier category.
