Whenever you are aware of unusual signs on your automobile, you are right to be worried, because a car represents a big annual budget and unforeseen breakdowns don’t reduce the costs. So what if you feel like you have a leaking injector on your Bmw Serie 3 E92? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can cause more severe engine trouble on your car, we chose to write this article content to help you ensure the failure of a leaking injector and treat it correctly. To do so, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Bmw Serie 3 E92.

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Leaking injector on my petrol Bmw Serie 3 E92

It is essential to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two sort of engines makes the injection distinct. 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 Bmw Serie 3 E92: The different leaks

It should be known that injector leaks on a Bmw Serie 3 E92 equipped with a petrol engine are rather rare. This is caused by 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 plausible that you have a leak from the top of the injector, this is the component that is attached to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    At last, you may suffer 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 previously.

Leaking injector on my diesel Bmw Serie 3 E92

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 Bmw Serie 3 E92: The different leaks

In the case of leaking diesel injectors on your Bmw Serie 3 E92, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform over time, commonly 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 Bmw Serie 3 E92 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 annoying, 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 suggest you to browse this article content on the existence of oil leaking on your Bmw Serie 3 E92.

Leaking injector on my Bmw Serie 3 E92, how to fix the leak

And to finish, we’re going to look into how to fix a leaking injector on your car. Very often a leak is linked, as we have seen sooner, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some precautions:

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

Relating to the repair part of your leak, it will oftentimes be limited to changing 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 accordance with the manufacturer’s standards.

In all situations, these interventions are not necessarily difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Bmw Serie 3 E92, we suggest you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Bmw Serie 3 E92.

Whenever you have any further questions about the Bmw Serie 3 E92, do not hesitate to consult our Bmw Serie 3 E92 category.