If you are alert of unusual signs on your car, you are right to be concerned, because a car represents a massive annual budget and unforeseen malfunctions don’t lower the costs. So what if you find that you have a leaking injector on your Nissan Navara? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or strange black smoke. These three symptoms are the main signals of a leaking injector. As this failure can bring about more serious engine concerns on your car, we made a decision to write this content page to help you verify the failure of a leaking injector and treat it properly. To achieve this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Nissan Navara.
Leaking injector on my petrol Nissan Navara
It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two sort 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 Navara: The different leaks
It should be mentioned that injector leaks on a Nissan Navara equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. However, 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 connected 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 Navara
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 Navara: The different leaks
In the case of leaking diesel injectors on your Nissan Navara, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Nissan Navara will be a consequence 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 find an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we recommend you to consult this content page on the presence of oil leaking on your Nissan Navara.
Leaking injector on my Nissan Navara, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Very often a leak is connected, as we have seen sooner, to a worn seal due to the pressures endured. 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 done…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will oftentimes be restricted to swapping the seals that have failed:
- Locate 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 respect with the manufacturer’s standards.
In all cases, these interventions are not automatically difficult, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Nissan Navara, we recommend you to get closer to your mechanic to avoid any bad handling that could severely harm the condition of your Nissan Navara.
To get more tips on the Nissan Navara, take a look at the Nissan Navara category.
