Whenever you are aware of abnormal symptoms on your car, you are right to be worried, because a car represents a massive annual budget and surprising breakdowns don’t reduce the expenses. So what if you think that you have a leaking injector on your Fiat Doblo 2? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three manifestations are the main signals of a leaking injector. As this problem can lead to more serious engine problems on your car, we decided to write this article to help you validate the failure of a leaking injector and treat it correctly. To achieve this, we will first look at the case of gasoline injectors and then at those of diesel injectors Fiat Doblo 2.
Leaking injector on my petrol Fiat Doblo 2
It is important to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two types 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 Fiat Doblo 2: The different leaks
It should be known that injector leaks on a Fiat Doblo 2 equipped with a petrol engine are pretty rare. This is caused by 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 plausible 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 appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Fiat Doblo 2
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Fiat Doblo 2: The different leaks
In the case of leaking diesel injectors on your Fiat Doblo 2, there are three different types of leaks:
- Leakage from the injector inlet:
In cases like this, 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 Fiat Doblo 2 will be caused by 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 experience an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we suggest you to read this article on the existence of oil leaking on your Fiat Doblo 2.
Leaking injector on my Fiat Doblo 2, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen previously, to a worn seal due to the pressures suffered. 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 carried out…
- Masking 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 frequently be restricted to changing the seals that have failed:
- Discover 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 cases, these interventions are not necessarily very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Fiat Doblo 2, we suggest you to get closer to your repair shop to avoid any bad handling that could significantly harm the condition of your Fiat Doblo 2.
In the event that you have any additional questions about the Fiat Doblo 2, do not hesitate to consult our Fiat Doblo 2 category.
