In the event you are alert of abnormal symptoms on your car, you are right to be worried, because a car represents a huge annual budget and unpredicted breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Renault Grand Espace? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unusual black smoke. These three manifestations are the main symptoms of a leaking injector. As this troubles can bring on more severe engine concerns on your car, we chose to write this content to help you validate the failure of a leaking injector and deal with it properly. To do so, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Renault Grand Espace.


Leaking injector on my petrol Renault Grand Espace

It is essential 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 key 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 Grand Espace: The different leaks

It should be said that injector leaks on a Renault Grand Espace equipped with a petrol engine are pretty rare. This is because of 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 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 experience a leak coming from the lower part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen sooner.

Leaking injector on my diesel Renault Grand Espace

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 Renault Grand Espace: The different leaks

In the case of leaking diesel injectors on your Renault Grand Espace, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform along with time, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Renault Grand Espace will be caused 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 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 on the existence of oil leaking on your Renault Grand Espace.

Leaking injector on my Renault Grand Espace, how to fix the leak

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

  • Lower the pressure before any work is done…
  • Covering 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 restricted to replacing the seals that have failed:

  • Situate the source of the leak
  • Dismantle 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 situations, these interventions are not inevitably complex, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Renault Grand Espace, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could seriously harm the condition of your Renault Grand Espace.

If you want more tutorials on the Renault Grand Espace, go to our Renault Grand Espace category.