Whenever you are alert of irregular signs on your car, you are right to be intrigued, because a car represents a big annual budget and unexpected breakdowns don’t reduce the costs. So what if you feel as if you have a leaking injector on your Audi Q5? You most likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unusual black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can produce more severe engine concerns on your car, we chose to compose this content page to help you ensure the failure of a leaking injector and deal with it correctly. To do this, we will first check out the case of gasoline injectors and then at those of diesel injectors Audi Q5.

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Leaking injector on my petrol Audi Q5

It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two kind of engines makes the injection distinct. The key 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 Q5: The different leaks

It should be said that injector leaks on a Audi Q5 equipped with a petrol engine are pretty rare. This is because of the much lower pressure in the petrol intake systems. Nevertheless, there are two kind 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 portion 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 portion 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 Audi Q5

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 Audi Q5: The different leaks

In the case of leaking diesel injectors on your Audi Q5, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In cases like this, 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 implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Audi Q5 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 annoying, 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 checking you have oil leaking but it does not come from your injectors, we advise you to consult this content page on the presence of oil leaking on your Audi Q5.

Leaking injector on my Audi Q5, how to fix the leak

And at last, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen sooner, to a worn seal caused by the pressures suffered. 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 done…
  • Masking 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 oftentimes be limited to changing 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 specifically complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Audi Q5, we advise you to get closer to your repair shop to avoid any bad handling that could severely harm the condition of your Audi Q5.

To get more tips on the Audi Q5, take a look at the Audi Q5 category.