In the event that you are informed of irregular symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and unforeseen breakdowns don’t lower the costs. So what if you find that you have a leaking injector on your Toyota Land Cruiser Serie 120? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unusual black smoke. These three symptoms are the main signals of a leaking injector. As this failure can lead to more serious engine problems on your car, we made a decision to write this article to help you validate the failure of a leaking injector and treat it correctly. To do so, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Toyota Land Cruiser Serie 120.
Leaking injector on my petrol Toyota Land Cruiser Serie 120
It is vital to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types of engines makes the injection different. The key 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 Toyota Land Cruiser Serie 120: The different leaks
It should be mentioned that injector leaks on a Toyota Land Cruiser Serie 120 equipped with a petrol engine are rather infrequent. This is caused by the much lower pressure in the petrol intake systems. Even so, 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 part that is connected 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 portion of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Toyota Land Cruiser Serie 120
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Toyota Land Cruiser Serie 120: The different leaks
In the circumstance of leaking diesel injectors on your Toyota Land Cruiser Serie 120, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform in the long run, in most cases 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 Toyota Land Cruiser Serie 120 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should encounter 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 on the presence of oil leaking on your Toyota Land Cruiser Serie 120.
Leaking injector on my Toyota Land Cruiser Serie 120, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is connected, as we have seen previously, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some 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.
Regarding the repair part of your leak, it will frequently be restricted to swapping 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 complex, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Toyota Land Cruiser Serie 120, we suggest you to get closer to your mechanic to avoid any bad handling that could severely harm the condition of your Toyota Land Cruiser Serie 120.
If you want more tutorials on the Toyota Land Cruiser Serie 120, go to our Toyota Land Cruiser Serie 120 category.
