In cases where you are informed of irregular symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and unpredicted breakdowns don’t reduce the costs. So what if you feel as if you have a leaking injector on your Bmw 1 series? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or uncommon black smoke. These three symptoms are the main symptoms of a leaking injector. As this failure can end up in more significant engine concerns on your car, we made a decision to publish this content to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Bmw 1 series.

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Leaking injector on my petrol Bmw 1 series

It is fundamental to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two sort of engines makes the injection different. The key difference lies in the pressure experienced 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 1 series: The different leaks

It should be noted that injector leaks on a Bmw 1 series equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. Nevertheless, 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 connected to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    At last, you may encounter a leak coming from the lower part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Bmw 1 series

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 1 series: The different leaks

In the case of leaking diesel injectors on your Bmw 1 series, there are three different sort of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform after a while, 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 1 series will be caused by an O-ring or its plastic tip that leaks.
  • Injector base leak:
    This injection leak is one of the most bothersome, 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 checking you have oil leaking but it does not come from your injectors, we advise you to browse this content on the existence of oil leaking on your Bmw 1 series.

Leaking injector on my Bmw 1 series, how to fix the leak

And finally, 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 due to the pressures endured. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some measures:

  • 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.

Relating to the repair part of your leak, it will very often be restricted to swapping the seals that have failed:

  • Locate the source of the leak
  • Dismantle the injector in question
  • Replace the corresponding seal kit
  • Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.

In all cases, these interventions are not automatically very hard, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Bmw 1 series, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Bmw 1 series.

To get more tips on the Bmw 1 series, take a look at the Bmw 1 series category.