In cases where you are aware of irregular signs on your car, you are right to be worried, because a car represents a huge annual budget and unpredicted malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Renault Clio 4? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unusual black smoke. These three symptoms are the main signals of a leaking injector. As this troubles can cause more serious engine concerns on your car, we thought we would prepare this content page to help you validate the failure of a leaking injector and treat it correctly. To do so, we will first of all take a look at the circumstance of gasoline injectors and then at those of diesel injectors Renault Clio 4.

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Leaking injector on my petrol Renault Clio 4

It is essential to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two types of engines makes the injection different. The main 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 Renault Clio 4: The different leaks

It should be noted that injector leaks on a Renault Clio 4 equipped with a petrol engine are rather rare. 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 possible that you have a leak from the top of the injector, this is the component 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 suffer a leak coming from the lower part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Renault Clio 4

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 Renault Clio 4: The different leaks

In the circumstance of leaking diesel injectors on your Renault Clio 4, there are three different types of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform as time passes, usually the leak will be at the clamping point.
  • Injector return leakage:
    As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Renault Clio 4 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 bothersome, 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 checking you have oil leaking but it does not come from your injectors, we advise you to read this content page on the existence of oil leaking on your Renault Clio 4.

Leaking injector on my Renault Clio 4, how to fix the leak

And finally, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is completed…
  • 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 swapping the seals that have failed:

  • Find out the source of the leak
  • Take apart the injector in question
  • Replace 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 automatically very hard, but if you have the slightest hesitation in the treatment of your injector that leaks on your Renault Clio 4, we advise you to get closer to your auto mechanic to avoid any bad manipulation that could critically harm the condition of your Renault Clio 4.

To discover more tips on the Renault Clio 4, take a look at the Renault Clio 4 category.