In the event you are aware of irregular symptoms on your automobile, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the bill. So what if you sense that you have a leaking injector on your Toyota Sequoia? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or abnormal black smoke. These three symptoms are the main symptoms of a leaking injector. As this problem can end up in more critical engine complications on your car, we chose to publish this article to help you confirm the failure of a leaking injector and treat it correctly. To achieve this, we will first of all take a look at the case of gasoline injectors and then at those of diesel injectors Toyota Sequoia.
Leaking injector on my petrol Toyota Sequoia
It is crucial to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two kind of engines makes the injection distinct. The essential 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 Sequoia: The different leaks
It should be noted that injector leaks on a Toyota Sequoia equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Even so, there are two kind of leaks:
- Leakage from the top of the injector:
It is possible that you have a leak from the top of the injector, this is the component that is linked 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 part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Toyota Sequoia
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Sequoia: The different leaks
In the case of leaking diesel injectors on your Toyota Sequoia, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, 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 implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Toyota Sequoia 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 experience an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we recommend you to browse this article on the presence of oil leaking on your Toyota Sequoia.
Leaking injector on my Toyota Sequoia, 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. Very often a leak is associated, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some precautions:
- 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.
Relating to the repair part of your leak, it will frequently be restricted to replacing the seals that have failed:
- Find 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 situations, these interventions are not inevitably complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Toyota Sequoia, we recommend you to get closer to your repair shop to avoid any bad manipulation that could seriously harm the condition of your Toyota Sequoia.
If you have any further questions about the Toyota Sequoia, do not hesitate to consult our Toyota Sequoia category.
