Whenever you are aware of irregular signs on your automobile, you are right to be intrigued, because a car represents a big annual budget and surprising breakdowns don’t lower the bill. So what if you sense that you have a leaking injector on your Fiat Doblo? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three manifestations are the main symptoms of a leaking injector. As this problem can bring about more severe engine problems on your car, we chose to produce this content to help you validate the failure of a leaking injector and deal with it properly. To achieve this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Fiat Doblo.
Leaking injector on my petrol Fiat Doblo
It is important to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two sort of engines makes the injection different. 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 Fiat Doblo: The different leaks
It should be known that injector leaks on a Fiat Doblo 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 sort 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 connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may encounter a leak coming from the lower part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Fiat Doblo
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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: The different leaks
In the case of leaking diesel injectors on your Fiat Doblo, there are three several sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform in the long run, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Fiat Doblo will be brought on 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 encounter an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we recommend you to read this content on the presence of oil leaking on your Fiat Doblo.
Leaking injector on my Fiat Doblo, how to fix the leak
And finally, we’re going to take a 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 endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is conducted…
- 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 oftentimes be limited to swapping the seals that have failed:
- Locate the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly 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 tiniest doubt in the treatment of your injector that leaks on your Fiat Doblo, we recommend you to get closer to your mechanic to avoid any bad handling that could severely harm the condition of your Fiat Doblo.
If you have any further questions about the Fiat Doblo, do not hesitate to consult our Fiat Doblo category.
