Whenever you are alert of unusual symptoms on your car, you are right to be intrigued, because a car represents a big annual budget and unexpected breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Nissan Qashqai 2? You probably figured it out thanks to black/oily drips along your engine, or a troubled idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can cause more serious engine complications on your car, we chose to write this article content to help you verify the failure of a leaking injector and treat it properly. To achieve this, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Nissan Qashqai 2.
Leaking injector on my petrol Nissan Qashqai 2
It is crucial to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two sort of engines makes the injection different. The biggest 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 Qashqai 2: The different leaks
It should be known that injector leaks on a Nissan Qashqai 2 equipped with a petrol engine are rather rare. This is resulting from 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 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:
Finally, you may experience a leak coming from the lower part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Nissan Qashqai 2
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 Qashqai 2: The different leaks
In the case of leaking diesel injectors on your Nissan Qashqai 2, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, 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 suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Nissan Qashqai 2 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 annoying, 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 advise you to consult this article content on the presence of oil leaking on your Nissan Qashqai 2.
Leaking injector on my Nissan Qashqai 2, 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 linked, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some safety 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.
Concerning the repair part of your leak, it will very often be limited to changing the seals that have failed:
- Locate the source of the leak
- Take apart 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 very hard, but if you have the smallest doubt in the treatment of your injector that leaks on your Nissan Qashqai 2, we advise you to get closer to your auto mechanic to avoid any bad manipulation that could severely harm the condition of your Nissan Qashqai 2.
Whenever you have any further questions about the Nissan Qashqai 2, do not hesitate to consult our Nissan Qashqai 2 category.
