In the event that you are informed of unusual signs on your car, you are right to be preoccupied, because a car represents a huge annual budget and sudden malfunctions don’t lower the bill. So what if you feel like you have a leaking injector on your Nissan Juke? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three symptoms are the main indicators of a leaking injector. As this troubles can bring on more critical engine problems on your car, we made a decision to prepare this article to help you confirm the failure of a leaking injector and handle it correctly. To do so, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Nissan Juke.
Leaking injector on my petrol Nissan Juke
It is fundamental to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two sort of engines makes the injection distinct. 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 Juke: The different leaks
It should be mentioned that injector leaks on a Nissan Juke 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 portion that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may suffer a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Nissan Juke
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Juke: The different leaks
In the case of leaking diesel injectors on your Nissan Juke, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with time, generally 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 Juke 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 checking you have oil leaking but it does not come from your injectors, we recommend you to consult this article on the presence of oil leaking on your Nissan Juke.
Leaking injector on my Nissan Juke, 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. Regularly a leak is connected, as we have seen previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is enormous, 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.
Concerning the repair part of your leak, it will very often be limited to swapping the seals that have failed:
- Find 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not specifically difficult, but if you have the slightest hesitation in the treatment of your injector that leaks on your Nissan Juke, we recommend you to get closer to your mechanic to avoid any bad manipulation that could severely harm the condition of your Nissan Juke.
If perhaps you have any further questions about the Nissan Juke, do not hesitate to consult our Nissan Juke category.