In cases where you are alert of unusual signs on your car, you are right to be preoccupied, because a car represents a massive annual budget and unexpected malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Lincoln MKZ? You most likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unusual black smoke. These three signs of illness are the main indicators of a leaking injector. As this problem can bring about more significant engine concerns on your car, we decided to write this article content to help you validate the failure of a leaking injector and handle it correctly. To do this, we will first look at the circumstance of gasoline injectors and then at those of diesel injectors Lincoln MKZ.
Leaking injector on my petrol Lincoln MKZ
It is fundamental to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two kind of engines makes the injection distinct. The main 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 Lincoln MKZ: The different leaks
It should be mentioned that injector leaks on a Lincoln MKZ equipped with a petrol engine are rather rare. This is due to 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 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 portion of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Lincoln MKZ
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 Lincoln MKZ: The different leaks
In the circumstance of leaking diesel injectors on your Lincoln MKZ, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, 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 Lincoln MKZ 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 troublesome, 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 verifying you have oil leaking but it does not come from your injectors, we advise you to read this article content on the existence of oil leaking on your Lincoln MKZ.
Leaking injector on my Lincoln MKZ, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is achieved…
- Masking 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 regularly be restricted to replacing the seals that have failed:
- Find the source of the leak
- Take apart 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 automatically complicated, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Lincoln MKZ, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Lincoln MKZ.
If perhaps you have any additional questions about the Lincoln MKZ, do not hesitate to consult our Lincoln MKZ category.
