If you are informed of abnormal signs on your car, you are right to be preoccupied, because a car represents a big annual budget and surprising breakdowns don’t lower the bill. So what if you find that you have a leaking injector on your Ford Focus? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this failure can cause more critical engine problems on your car, we chose to write this content to help you validate the failure of a leaking injector and deal with it properly. To achieve this, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Ford Focus.

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Leaking injector on my petrol Ford Focus

It is vital to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two kind 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 Ford Focus: The different leaks

It should be noted that injector leaks on a Ford Focus equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, 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 part 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 come from the junction with the engine and not with the rail as seen sooner.

Leaking injector on my diesel Ford Focus

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure generates 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 Ford Focus: The different leaks

In the circumstance of leaking diesel injectors on your Ford Focus, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform over time, in most cases the leak will be at the clamping point.
  • Injector return leakage:
    As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Ford Focus 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 suggest you to browse this content on the presence of oil leaking on your Ford Focus.

Leaking injector on my Ford Focus, how to fix the leak

And at last, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is linked, 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 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 frequently be limited to changing the seals that have failed:

  • Find 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 situations, these interventions are not automatically complex, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Ford Focus, we suggest you to get closer to your mechanic to avoid any bad handling that could significantly harm the condition of your Ford Focus.

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