In the event that you are informed of abnormal symptoms on your vehicle, you are right to be preoccupied, because a car represents a huge annual budget and unforeseen malfunctions don’t reduce the bill. So what if you find that you have a leaking injector on your Volkswagen Atlas? You likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main symptoms of a leaking injector. As this troubles can cause more serious engine trouble on your car, we chose to compose this content page to help you confirm the failure of a leaking injector and deal with it properly. To accomplish this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Volkswagen Atlas.

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Leaking injector on my petrol Volkswagen Atlas

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 kind of engines makes the injection distinct. The biggest 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 Volkswagen Atlas: The different leaks

It should be noted that injector leaks on a Volkswagen Atlas equipped with a petrol engine are rather infrequent. This is due to 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 appear from the junction with the engine and not with the rail as seen sooner.

Leaking injector on my diesel Volkswagen Atlas

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 Volkswagen Atlas: The different leaks

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

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform along with time, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Atlas will be caused 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 checking you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the existence of oil leaking on your Volkswagen Atlas.

Leaking injector on my Volkswagen Atlas, how to fix the leak

And to finish, we’re going to check out how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen previously, 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 precautions:

  • Lower the pressure before any work is carried out…
  • 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 very often be limited to replacing the seals that have failed:

  • Situate the source of the leak
  • Take apart the injector in question
  • Change the corresponding seal kit
  • Reassemble the assembly and tighten with a torque wrench in accordance with the manufacturer’s standards.

In all situations, these interventions are not necessarily complex, but if you have the tiniest doubt in the treatment of your injector that leaks on your Volkswagen Atlas, we encourage you to get closer to your motor mechanic to avoid any bad handling that could significantly harm the condition of your Volkswagen Atlas.

Whenever you have any further questions about the Volkswagen Atlas, do not hesitate to consult our Volkswagen Atlas category.