If you are alert of unusual signs on your automobile, you are right to be intrigued, because a car represents a big annual budget and surprising breakdowns don’t reduce the expenses. So what if you feel as if you have a leaking injector on your Ford Fusion? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three symptoms are the main signs of a leaking injector. As this troubles can end up in more significant engine trouble on your car, we decided to prepare this content to help you validate the failure of a leaking injector and deal with it properly. To achieve this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Ford Fusion.
Leaking injector on my petrol Ford Fusion
It is crucial to know that the injectors on petrol and diesel engines are distinct, in fact, 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 Fusion: The different leaks
It should be mentioned that injector leaks on a Ford Fusion equipped with a petrol engine are pretty infrequent. This is as a result 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 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 encounter a leak coming from the lower part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Ford Fusion
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Fusion: The different leaks
In the case of leaking diesel injectors on your Ford Fusion, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, usually the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Ford Fusion will be the result of 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to consult this content on the existence of oil leaking on your Ford Fusion.
Leaking injector on my Ford Fusion, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen sooner, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some precautions:
- 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.
Regarding the repair part of your leak, it will frequently be restricted to replacing the seals that have failed:
- Find 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 accordance with the manufacturer’s standards.
In all cases, these interventions are not necessarily very hard, but if you have the smallest hesitation in the treatment of your injector that leaks on your Ford Fusion, we recommend you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Ford Fusion.
Whenever you have any further questions about the Ford Fusion, do not hesitate to consult our Ford Fusion category.
