In cases where you are aware of abnormal symptoms on your vehicle, you are right to be worried, because a car represents a big annual budget and sudden breakdowns don’t reduce the bill. So what if you find that you have a leaking injector on your Toyota Yaris 3? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three manifestations are the main signals of a leaking injector. As this problem can cause more critical engine trouble on your car, we thought we would prepare this article to help you confirm the failure of a leaking injector and deal with it properly. To do this, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Toyota Yaris 3.
Leaking injector on my petrol Toyota Yaris 3
It is essential to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two sort of engines makes the injection distinct. The main 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 Toyota Yaris 3: The different leaks
It should be mentioned that injector leaks on a Toyota Yaris 3 equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. However, there are two sort 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 part that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may encounter 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 Yaris 3
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 Yaris 3: The different leaks
In the circumstance of leaking diesel injectors on your Toyota Yaris 3, there are three different sort of leaks:
- Leakage from the injector inlet:
In this instance, 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 Toyota Yaris 3 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 troublesome, 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 examining 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 Yaris 3.
Leaking injector on my Toyota Yaris 3, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Very often a leak is connected, as we have seen previously, to a worn seal caused by 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 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 limited to swapping the seals that have failed:
- Find out the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all situations, these interventions are not inevitably complex, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Toyota Yaris 3, we suggest you to get closer to your repair shop to avoid any bad handling that could seriously harm the condition of your Toyota Yaris 3.
If you need more tutorials on the Toyota Yaris 3, go to our Toyota Yaris 3 category.
