If you are informed of irregular symptoms on your automobile, you are right to be concerned, because a car represents a big annual budget and unforeseen malfunctions don’t reduce the costs. So what if you feel like you have a leaking injector on your Citroen C4 Picasso? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three manifestations are the main signs of a leaking injector. As this troubles can cause more significant engine concerns on your car, we decided to prepare this content to help you validate the failure of a leaking injector and treat it properly. To do this, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Citroen C4 Picasso.

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Leaking injector on my petrol Citroen C4 Picasso

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 types of engines makes the injection different. 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 Citroen C4 Picasso: The different leaks

It should be mentioned that injector leaks on a Citroen C4 Picasso equipped with a petrol engine are rather infrequent. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, there are two types of leaks:

  • Leakage from the top of the injector:
    It is conceivable 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 previously.

Leaking injector on my diesel Citroen C4 Picasso

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 Citroen C4 Picasso: The different leaks

In the case of leaking diesel injectors on your Citroen C4 Picasso, there are three several types of leaks:

  • Leakage from the injector inlet:
    In cases like this, 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 suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Citroen C4 Picasso 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 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 checking you have oil leaking but it does not come from your injectors, we encourage you to read this content on the existence of oil leaking on your Citroen C4 Picasso.

Leaking injector on my Citroen C4 Picasso, how to fix the leak

And finally, we’re going to look at how to fix a leaking injector on your car. Very often a leak is connected, as we have seen sooner, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some safety measures:

  • 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.

Regarding the repair part of your leak, it will frequently be restricted to swapping the seals that have failed:

  • Find 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 accordance with the manufacturer’s standards.

In all situations, these interventions are not specifically difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Citroen C4 Picasso, we encourage you to get closer to your auto technician to avoid any bad handling that could critically harm the condition of your Citroen C4 Picasso.

To get more tips on the Citroen C4 Picasso, take a look at the Citroen C4 Picasso category.