Whenever you are aware of abnormal symptoms on your automobile, you are right to be concerned, because a car represents a big annual budget and sudden breakdowns don’t lower the expenses. So what if you think that you have a leaking injector on your Nissan Terrano? You likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main symptoms of a leaking injector. As this failure can bring about more critical engine complications on your car, we chose to produce this article content to help you confirm the failure of a leaking injector and treat it properly. To accomplish this, we will first take a look at the circumstance of gasoline injectors and then at those of diesel injectors Nissan Terrano.
Leaking injector on my petrol Nissan Terrano
It is important to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two kind of engines makes the injection distinct. The key 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 Terrano: The different leaks
It should be said that injector leaks on a Nissan Terrano equipped with a petrol engine are pretty rare. This is due to the much lower pressure in the petrol intake systems. Nevertheless, there are two kind 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 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 experience 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 sooner.
Leaking injector on my diesel Nissan Terrano
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Terrano: The different leaks
In the circumstance of leaking diesel injectors on your Nissan Terrano, there are three several kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform with time, generally 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 Terrano 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 bothersome, 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to read this article content on the presence of oil leaking on your Nissan Terrano.
Leaking injector on my Nissan Terrano, how to fix the leak
And finally, we’re going to take a 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 due to the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is done…
- 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:
- Locate the source of the leak
- Dismantle 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 necessarily complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Nissan Terrano, we encourage you to get closer to your motor mechanic to avoid any bad handling that could critically harm the condition of your Nissan Terrano.
Whenever you have any additional questions about the Nissan Terrano, do not hesitate to consult our Nissan Terrano category.
