In the event you are alert of abnormal symptoms on your car, you are right to be concerned, because a car represents a big annual budget and sudden malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Lexus NX? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or uncommon black smoke. These three symptoms are the main indicators of a leaking injector. As this troubles can bring about more serious engine problems on your car, we chose to produce this article content to help you confirm the failure of a leaking injector and deal with it correctly. To do this, we will initially look into the circumstance of gasoline injectors and then at those of diesel injectors Lexus NX.
Leaking injector on my petrol Lexus NX
It is vital to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two types 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 Lexus NX: The different leaks
It should be known that injector leaks on a Lexus NX equipped with a petrol engine are pretty rare. This is as a result of 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 conceivable that you have a leak from the top of the injector, this is the portion that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may encounter 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 Lexus NX
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 Lexus NX: The different leaks
In the circumstance of leaking diesel injectors on your Lexus NX, there are three different types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform as time passes, usually the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Lexus NX 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 experience an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we suggest you to consult this article content on the existence of oil leaking on your Lexus NX.
Leaking injector on my Lexus NX, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is achieved…
- 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 oftentimes be restricted to replacing the seals that have failed:
- Discover the source of the leak
- Dismantle the injector in question
- Replace the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not specifically complex, but if you have the slightest doubt in the treatment of your injector that leaks on your Lexus NX, we suggest you to get closer to your mechanic to avoid any bad manipulation that could significantly harm the condition of your Lexus NX.
If you want more guides on the Lexus NX, go to our Lexus NX category.
