In the event that you are informed of irregular signs on your car, you are right to be preoccupied, because a car represents a huge annual budget and sudden breakdowns don’t lower the costs. So what if you think that you have a leaking injector on your Audi A6? You most likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or uncommon black smoke. These three symptoms are the main signs of a leaking injector. As this troubles can lead to more significant engine problems on your car, we chose to produce this article to help you validate the failure of a leaking injector and treat it correctly. To do so, we will first look at the circumstance of gasoline injectors and then at those of diesel injectors Audi A6.


Leaking injector on my petrol Audi A6

It is fundamental to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two sort of engines makes the injection different. The essential 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 Audi A6: The different leaks

It should be noted that injector leaks on a Audi A6 equipped with a petrol engine are pretty rare. This is because of 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 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:
    At last, you may experience a leak coming from the lower portion 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 A6

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 Audi A6: The different leaks

In the circumstance of leaking diesel injectors on your Audi A6, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform as time passes, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Audi A6 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 troublesome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss.
  • If after examining 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 Audi A6.

Leaking injector on my Audi A6, how to fix the leak

And at last, we’re going to look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen prior to this, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some safety measures:

  • Lower the pressure before any work is done…
  • Masking you to avoid the risk of fuel spillage
  • NEVER work on a running diesel engine injector.

Concerning the repair part of your leak, it will regularly be restricted to swapping the seals that have failed:

  • Find the source of the leak
  • Dismantle the injector in question
  • Change 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 specifically complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Audi A6, we recommend you to get closer to your auto technician to avoid any bad handling that could severely harm the condition of your Audi A6.

If you want more tutorials on the Audi A6, go to our Audi A6 category.