In the event you are aware of abnormal signs on your vehicle, you are right to be concerned, because a car represents a big annual budget and sudden malfunctions don’t reduce the bill. So what if you think that you have a leaking injector on your Land Rover Discovery? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three manifestations are the main symptoms of a leaking injector. As this problem can lead to more severe engine concerns on your car, we decided to compose this article to help you ensure the failure of a leaking injector and deal with it properly. To accomplish this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Land Rover Discovery.


Leaking injector on my petrol Land Rover Discovery

It is essential to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two kind 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 Land Rover Discovery: The different leaks

It should be noted that injector leaks on a Land Rover Discovery equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. Even so, there are two kind 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 linked to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, you may suffer 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 previously.

Leaking injector on my diesel Land Rover Discovery

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Land Rover Discovery: The different leaks

In the case of leaking diesel injectors on your Land Rover Discovery, there are three several kind of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform as time passes, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Land Rover Discovery 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss.
  • If after verifying you have oil leaking but it does not come from your injectors, we advise you to read this article on the existence of oil leaking on your Land Rover Discovery.

Leaking injector on my Land Rover Discovery, how to fix the leak

And to finish, 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 gigantic, 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.

Relating to the repair part of your leak, it will very often 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 accordance with the manufacturer’s standards.

In all cases, these interventions are not specifically difficult, but if you have the slightest doubt in the treatment of your injector that leaks on your Land Rover Discovery, we advise you to get closer to your mechanic to avoid any bad manipulation that could seriously harm the condition of your Land Rover Discovery.

If you want more guides on the Land Rover Discovery, go to our Land Rover Discovery category.