In the event you are aware of abnormal symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and surprising breakdowns don’t lower the bill. So what if you find that you have a leaking injector on your Hyundai Sonata? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three symptoms are the main signs of a leaking injector. As this troubles can lead to more severe engine complications on your car, we chose to produce this article to help you ensure the failure of a leaking injector and treat it properly. To do so, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Hyundai Sonata.
Leaking injector on my petrol Hyundai Sonata
It is fundamental 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 key 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 Hyundai Sonata: The different leaks
It should be mentioned that injector leaks on a Hyundai Sonata equipped with a petrol engine are rather infrequent. This is resulting from 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 linked 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 come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Hyundai Sonata
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 Hyundai Sonata: The different leaks
In the case of leaking diesel injectors on your Hyundai Sonata, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, 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 implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Hyundai Sonata 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we advise you to browse this article on the presence of oil leaking on your Hyundai Sonata.
Leaking injector on my Hyundai Sonata, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is connected, 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 gigantic, especially on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is done…
- 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 oftentimes be limited to changing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not specifically complex, but if you have the slightest hesitation in the treatment of your injector that leaks on your Hyundai Sonata, we advise you to get closer to your auto technician to avoid any bad handling that could severely harm the condition of your Hyundai Sonata.
Whenever you have any additional questions about the Hyundai Sonata, do not hesitate to consult our Hyundai Sonata category.
