Whenever you are alert of irregular symptoms on your automobile, you are right to be worried, because a car represents a huge annual budget and surprising breakdowns don’t lower the costs. So what if you feel as if you have a leaking injector on your Mini Cooper? You likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three signs of illness are the main indicators of a leaking injector. As this failure can end up in more critical engine problems on your car, we decided to prepare this content page to help you confirm the failure of a leaking injector and deal with it correctly. To achieve this, we will first of all check out the circumstance of gasoline injectors and then at those of diesel injectors Mini Cooper.

leaking-injector-mini-cooper

Leaking injector on my petrol Mini Cooper

It is essential to know that the injectors on petrol and diesel engines are different, in reality, 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 Mini Cooper: The different leaks

It should be noted that injector leaks on a Mini Cooper equipped with a petrol engine are pretty rare. This is because of 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 conceivable 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:
    Finally, you may experience a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.

Leaking injector on my diesel Mini Cooper

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Mini Cooper: The different leaks

In the circumstance of leaking diesel injectors on your Mini Cooper, there are three several kind of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform as time passes, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mini Cooper 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 bothersome, 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to browse this content page on the presence of oil leaking on your Mini Cooper.

Leaking injector on my Mini Cooper, how to fix the leak

And at last, we’re going to check out how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen prior to this, to a worn seal due to the pressures endured. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is carried out…
  • 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 frequently be limited to changing the seals that have failed:

  • Find out 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 respect with the manufacturer’s standards.

In all situations, these interventions are not automatically difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Mini Cooper, we encourage you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Mini Cooper.

If you have any further questions about the Mini Cooper, do not hesitate to consult our Mini Cooper category.