Whenever you are alert of irregular symptoms on your car, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Toyota Avalon? You likely figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can lead to more significant engine concerns on your car, we chose to prepare this article content to help you confirm the failure of a leaking injector and deal with it properly. To do so, we will initially look into the circumstance of gasoline injectors and then at those of diesel injectors Toyota Avalon.
Leaking injector on my petrol Toyota Avalon
It is essential to know that the injectors on petrol and diesel engines are distinct, the truth 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 Avalon: The different leaks
It should be mentioned that injector leaks on a Toyota Avalon equipped with a petrol engine are rather rare. This is due to 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 conceivable 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:
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 Toyota Avalon
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 Avalon: The different leaks
In the circumstance of leaking diesel injectors on your Toyota Avalon, there are three several sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform in the long run, generally the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Toyota Avalon 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 bothersome, 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 browse this article content on the existence of oil leaking on your Toyota Avalon.
Leaking injector on my Toyota Avalon, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Very often a leak is connected, as we have seen sooner, to a worn seal because of the pressures endured. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- 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:
- 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 automatically difficult, but if you have the smallest doubt in the treatment of your injector that leaks on your Toyota Avalon, we suggest you to get closer to your repair shop to avoid any bad manipulation that could significantly harm the condition of your Toyota Avalon.
To find more tips on the Toyota Avalon, take a look at the Toyota Avalon category.
