If you are aware of unusual signs on your vehicle, you are right to be intrigued, because a car represents a massive annual budget and unpredicted breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Nissan Leaf? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or abnormal black smoke. These three manifestations are the main signals of a leaking injector. As this troubles can cause more severe engine concerns on your car, we chose to write this article content to help you validate the failure of a leaking injector and treat it correctly. To achieve this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Nissan Leaf.
Leaking injector on my petrol Nissan Leaf
It is important to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two types of engines makes the injection different. 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 Leaf: The different leaks
It should be known that injector leaks on a Nissan Leaf equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. However, 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 attached 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 portion 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 Leaf
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 Leaf: The different leaks
In the case of leaking diesel injectors on your Nissan Leaf, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform over time, generally the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Nissan Leaf will be brought on by 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 experience 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 content on the presence of oil leaking on your Nissan Leaf.
Leaking injector on my Nissan Leaf, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is completed…
- 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 very often be limited to changing the seals that have failed:
- Locate 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 respect with the manufacturer’s standards.
In all cases, these interventions are not inevitably complicated, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Nissan Leaf, we recommend you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Nissan Leaf.
If you wish more guides on the Nissan Leaf, go to our Nissan Leaf category.
