In the event you are aware of irregular signs on your vehicle, you are right to be preoccupied, because a car represents a big annual budget and unforeseen breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Mini Countryman? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unusual black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can end up in more severe engine trouble on your car, we decided to publish this article to help you validate the failure of a leaking injector and treat it correctly. To do so, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Mini Countryman.


Leaking injector on my petrol Mini Countryman

It is important to know that the injectors on petrol and diesel engines are distinct, in fact, 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 Mini Countryman: The different leaks

It should be noted that injector leaks on a Mini Countryman equipped with a petrol engine are rather infrequent. This is caused by the much lower pressure in the petrol intake systems. However, 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 part 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 part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.

Leaking injector on my diesel Mini Countryman

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 Mini Countryman: The different leaks

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

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform after a while, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mini Countryman will be a consequence of 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 recommend you to browse this article on the existence of oil leaking on your Mini Countryman.

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

And at last, we’re going to look at how to fix a leaking injector on your car. Very often a leak is associated, as we have seen prior to this, 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 measures:

  • Lower the pressure before any work is completed…
  • 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 oftentimes be limited to replacing the seals that have failed:

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

In all cases, these interventions are not specifically complicated, but if you have the slightest hesitation in the treatment of your injector that leaks on your Mini Countryman, we recommend you to get closer to your auto technician to avoid any bad handling that could significantly harm the condition of your Mini Countryman.

To discover more tips on the Mini Countryman, take a look at the Mini Countryman category.