Whenever you are informed of abnormal symptoms on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unexpected breakdowns don’t lower the expenses. So what if you feel like you have a leaking injector on your Ford Expedition? 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 indicators of a leaking injector. As this problem can end up in more significant engine problems on your car, we decided to prepare this content page to help you validate the failure of a leaking injector and treat it properly. To do so, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Ford Expedition.


Leaking injector on my petrol Ford Expedition

It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two types of engines makes the injection distinct. The biggest 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 Ford Expedition: The different leaks

It should be noted that injector leaks on a Ford Expedition equipped with a petrol engine are rather infrequent. This is because of the much lower pressure in the petrol intake systems. Even so, there are two types 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 linked to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, you may encounter 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 sooner.

Leaking injector on my diesel Ford Expedition

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 Ford Expedition: The different leaks

In the circumstance of leaking diesel injectors on your Ford Expedition, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform along with time, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Ford Expedition 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 troublesome, 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 suggest you to browse this content page on the presence of oil leaking on your Ford Expedition.

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

And finally, we’re going to 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 as a result of the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some safety 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 regularly be limited to replacing the seals that have failed:

  • Discover the source of the leak
  • Dismantle 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 situations, these interventions are not inevitably complicated, but if you have the slightest doubt in the treatment of your injector that leaks on your Ford Expedition, we suggest you to get closer to your repair shop to avoid any bad manipulation that could critically harm the condition of your Ford Expedition.

In the event that you have any further questions about the Ford Expedition, do not hesitate to consult our Ford Expedition category.