If you are alert of unusual signs on your vehicle, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Kia Sedona? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unusual black smoke. These three signs of illness are the main indicators of a leaking injector. As this problem can cause more serious engine problems on your car, we thought we would prepare this article to help you confirm the failure of a leaking injector and treat it properly. To achieve this, we will initially look into the circumstance of gasoline injectors and then at those of diesel injectors Kia Sedona.
Leaking injector on my petrol Kia Sedona
It is essential to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two sort of engines makes the injection different. 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 Kia Sedona: The different leaks
It should be known that injector leaks on a Kia Sedona equipped with a petrol engine are rather rare. This is due to the much lower pressure in the petrol intake systems. Nevertheless, there are two sort 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 portion 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 occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Kia Sedona
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 Kia Sedona: The different leaks
In the circumstance of leaking diesel injectors on your Kia Sedona, there are three several sort of leaks:
- Leakage from the injector inlet:
In this case, 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 Kia Sedona 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 consult this article on the presence of oil leaking on your Kia Sedona.
Leaking injector on my Kia Sedona, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Very often a leak is connected, as we have seen previously, 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 achieved…
- 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 very often be limited to replacing the seals that have failed:
- Identify 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 complex, but if you have the slightest doubt in the treatment of your injector that leaks on your Kia Sedona, we suggest you to get closer to your repair shop to avoid any bad handling that could critically harm the condition of your Kia Sedona.
If you wish more guides on the Kia Sedona, go to our Kia Sedona category.
