In the event you are informed of irregular symptoms on your automobile, you are right to be intrigued, because a car represents a big annual budget and unpredicted breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Fiat Doblo Cargo? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three symptoms are the main indicators of a leaking injector. As this problem can end up in more critical engine complications on your car, we thought we would write this article content to help you ensure the failure of a leaking injector and treat it properly. To achieve this, we will first of all take a look at the circumstance of gasoline injectors and then at those of diesel injectors Fiat Doblo Cargo.


Leaking injector on my petrol Fiat Doblo Cargo

It is crucial to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two sort of engines makes the injection distinct. The main 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 Cargo: The different leaks

It should be said that injector leaks on a Fiat Doblo Cargo equipped with a petrol engine are rather infrequent. 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 plausible that you have a leak from the top of the injector, this is the portion that is connected 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 Fiat Doblo Cargo

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 Cargo: The different leaks

In the circumstance of leaking diesel injectors on your Fiat Doblo Cargo, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform with time, usually the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Fiat Doblo Cargo 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 encounter 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 content on the existence of oil leaking on your Fiat Doblo Cargo.

Leaking injector on my Fiat Doblo Cargo, how to fix the leak

And at last, 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 suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some safety measures:

  • Lower the pressure before any work is carried out…
  • Covering 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 oftentimes be limited to changing the seals that have failed:

  • Identify 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 respect with the manufacturer’s standards.

In all cases, these interventions are not necessarily complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Fiat Doblo Cargo, we suggest you to get closer to your auto mechanic to avoid any bad handling that could seriously harm the condition of your Fiat Doblo Cargo.

If you wish more guides on the Fiat Doblo Cargo, go to our Fiat Doblo Cargo category.