In the event you are informed of irregular signs on your car, you are right to be intrigued, because a car represents a big annual budget and unpredicted breakdowns don’t lower the bill. So what if you sense that you have a leaking injector on your Audi A8? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three manifestations are the main symptoms of a leaking injector. As this problem can bring about more severe engine trouble on your car, we decided to publish this content to help you ensure the failure of a leaking injector and treat it correctly. To accomplish this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Audi A8.
Leaking injector on my petrol Audi A8
It is crucial to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two types 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 Audi A8: The different leaks
It should be noted that injector leaks on a Audi A8 equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Nevertheless, 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 component that is linked 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 come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Audi A8
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure generates 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 Audi A8: The different leaks
In the case of leaking diesel injectors on your Audi A8, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform with time, commonly 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 Audi A8 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 verifying you have oil leaking but it does not come from your injectors, we advise you to browse this content on the existence of oil leaking on your Audi A8.
Leaking injector on my Audi A8, how to fix the leak
And at last, we’re going to take a look at how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, especially 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 limited to swapping the seals that have failed:
- Discover 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 respect with the manufacturer’s standards.
In all situations, these interventions are not automatically complex, but if you have the smallest doubt in the treatment of your injector that leaks on your Audi A8, we advise you to get closer to your repair shop to avoid any bad handling that could severely harm the condition of your Audi A8.
To discover more tips on the Audi A8, take a look at the Audi A8 category.
