In the event that you are aware of abnormal symptoms on your automobile, you are right to be concerned, because a car represents a massive annual budget and unexpected malfunctions don’t reduce the costs. So what if you think that you have a leaking injector on your Fiat Fullback? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can produce more significant engine complications on your car, we decided to produce this article content to help you validate the failure of a leaking injector and treat it correctly. To accomplish this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Fiat Fullback.

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Leaking injector on my petrol Fiat Fullback

It is vital to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two types of engines makes the injection distinct. 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 Fullback: The different leaks

It should be mentioned that injector leaks on a Fiat Fullback equipped with a petrol engine are rather infrequent. This is caused by the much lower pressure in the petrol intake systems. However, 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 portion that is attached to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    At last, you may experience 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 Fullback

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 Fiat Fullback: The different leaks

In the circumstance of leaking diesel injectors on your Fiat Fullback, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform with time, in most cases the leak will be at the clamping point.
  • Injector return leakage:
    As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Fiat Fullback 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 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this article content on the presence of oil leaking on your Fiat Fullback.

Leaking injector on my Fiat Fullback, how to fix the leak

And at last, we’re going to look into how to fix a leaking injector on your car. Very often a leak is associated, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some precautions:

  • 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 very often be restricted to swapping the seals that have failed:

  • Identify the source of the leak
  • Take apart the injector in question
  • Change the corresponding seal kit
  • Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.

In all situations, these interventions are not specifically difficult, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Fiat Fullback, we encourage you to get closer to your repair shop to avoid any bad manipulation that could seriously harm the condition of your Fiat Fullback.

If you want more tutorials on the Fiat Fullback, go to our Fiat Fullback category.