In the event you are informed of unusual signs on your automobile, you are right to be preoccupied, because a car represents a huge annual budget and unpredicted breakdowns don’t reduce the costs. So what if you think that you have a leaking injector on your Bmw Serie 3 F30? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unusual black smoke. These three manifestations are the main signals of a leaking injector. As this troubles can bring about more critical engine complications on your car, we thought we would prepare this article to help you verify the failure of a leaking injector and handle it correctly. To achieve this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Bmw Serie 3 F30.

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Leaking injector on my petrol Bmw Serie 3 F30

It is essential to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two kind of engines makes the injection different. 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 Bmw Serie 3 F30: The different leaks

It should be known that injector leaks on a Bmw Serie 3 F30 equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Even so, there are two kind 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 portion that is attached 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 sooner.

Leaking injector on my diesel Bmw Serie 3 F30

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 F30: The different leaks

In the case of leaking diesel injectors on your Bmw Serie 3 F30, 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, in most cases 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 Bmw Serie 3 F30 will be the result of 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 encounter an air noise and a compression loss.
  • If after verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this article on the existence of oil leaking on your Bmw Serie 3 F30.

Leaking injector on my Bmw Serie 3 F30, how to fix the leak

And to finish, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen sooner, to a worn seal caused by the pressures endured. 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…
  • Covering 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 replacing the seals that have failed:

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

In all cases, these interventions are not automatically complicated, but if you have the tiniest doubt in the treatment of your injector that leaks on your Bmw Serie 3 F30, we encourage you to get closer to your auto mechanic to avoid any bad handling that could significantly harm the condition of your Bmw Serie 3 F30.

If you wish more guides on the Bmw Serie 3 F30, go to our Bmw Serie 3 F30 category.