Whenever you are informed of irregular symptoms on your car, you are right to be concerned, because a car represents a huge annual budget and unexpected breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Nissan Micra? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three symptoms are the main indicators of a leaking injector. As this problem can bring about more significant engine problems on your car, we thought we would publish this content page to help you verify the failure of a leaking injector and deal with it properly. To accomplish this, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Nissan Micra.
Leaking injector on my petrol Nissan Micra
It is crucial 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 biggest 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 Micra: The different leaks
It should be said that injector leaks on a Nissan Micra equipped with a petrol engine are rather infrequent. This is because of 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 part 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 occur from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Nissan Micra
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 Micra: The different leaks
In the case of leaking diesel injectors on your Nissan Micra, there are three different sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform along with time, usually 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 Micra 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 troublesome, 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 checking you have oil leaking but it does not come from your injectors, we encourage you to read this content page on the existence of oil leaking on your Nissan Micra.
Leaking injector on my Nissan Micra, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- 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 restricted to replacing the seals that have failed:
- Find out the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all cases, these interventions are not inevitably complex, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Nissan Micra, we encourage you to get closer to your auto technician to avoid any bad handling that could significantly harm the condition of your Nissan Micra.
In the event that you have any additional questions about the Nissan Micra, do not hesitate to consult our Nissan Micra category.
