If you are informed of unusual symptoms on your car, you are right to be worried, because a car represents a massive annual budget and unforeseen malfunctions don’t reduce the bill. So what if you think that you have a leaking injector on your Nissan Micra 5? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three symptoms are the main symptoms of a leaking injector. As this failure can bring on more critical engine concerns on your car, we decided to compose this article to help you validate the failure of a leaking injector and deal with it properly. To achieve this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Nissan Micra 5.
Leaking injector on my petrol Nissan Micra 5
It is important to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two types of engines makes the injection different. The essential 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 5: The different leaks
It should be said that injector leaks on a Nissan Micra 5 equipped with a petrol engine are rather infrequent. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, there are two types of leaks:
- Leakage from the top of the injector:
It is plausible that you have a leak from the top of the injector, this is the part 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 part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Nissan Micra 5
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure creates 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 5: The different leaks
In the case of leaking diesel injectors on your Nissan Micra 5, there are three different types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform after a while, generally 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 Micra 5 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 read this article on the presence of oil leaking on your Nissan Micra 5.
Leaking injector on my Nissan Micra 5, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Oftentimes 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 tremendous, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is completed…
- 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:
- Situate 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 situations, these interventions are not necessarily difficult, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Nissan Micra 5, we encourage you to get closer to your auto technician to avoid any bad manipulation that could significantly harm the condition of your Nissan Micra 5.
Whenever you have any further questions about the Nissan Micra 5, do not hesitate to consult our Nissan Micra 5 category.
