In the event you are alert of abnormal symptoms on your car, you are right to be worried, because a car represents a huge annual budget and unpredicted malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Toyota Corolla? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three symptoms are the main signals of a leaking injector. As this troubles can end up in more significant engine complications on your car, we made a decision to write this article content to help you validate the failure of a leaking injector and deal with it properly. To accomplish this, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Toyota Corolla.
Leaking injector on my petrol Toyota Corolla
It is fundamental to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two sort of engines makes the injection different. 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 Corolla: The different leaks
It should be said that injector leaks on a Toyota Corolla equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. Even so, there are two sort of leaks:
- Leakage from the top of the injector:
It is plausible 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 part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Toyota Corolla
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 Toyota Corolla: The different leaks
In the circumstance of leaking diesel injectors on your Toyota Corolla, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, generally the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Toyota Corolla 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 annoying, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we advise you to browse this article content on the presence of oil leaking on your Toyota Corolla.
Leaking injector on my Toyota Corolla, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen prior to this, to a worn seal due to the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is conducted…
- 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 regularly be limited 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 set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not necessarily difficult, but if you have the smallest hesitation in the treatment of your injector that leaks on your Toyota Corolla, we advise you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Toyota Corolla.
If perhaps you have any further questions about the Toyota Corolla, do not hesitate to consult our Toyota Corolla category.
