In cases where you are alert of irregular signs on your car, you are right to be preoccupied, because a car represents a massive annual budget and surprising breakdowns don’t reduce the costs. So what if you find that you have a leaking injector on your Buick Envision? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three signs of illness are the main symptoms of a leaking injector. As this troubles can lead to more critical engine concerns on your car, we thought we would publish this content page to help you ensure the failure of a leaking injector and deal with it properly. To accomplish this, we will first take a look at the circumstance of gasoline injectors and then at those of diesel injectors Buick Envision.

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Leaking injector on my petrol Buick Envision

It is crucial to know that the injectors on petrol and diesel engines are different, in fact, 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 Buick Envision: The different leaks

It should be known that injector leaks on a Buick Envision equipped with a petrol engine are pretty rare. This is as a result of the much lower pressure in the petrol intake systems. Even so, 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 occur from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Buick Envision

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Buick Envision: The different leaks

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

  • Leakage from the injector inlet:
    In this instance, 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 implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Buick Envision 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 troublesome, 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 read this content page on the presence of oil leaking on your Buick Envision.

Leaking injector on my Buick Envision, how to fix the leak

And at last, we’re going to take a look at how to fix a leaking injector on your car. Very often a leak is linked, as we have seen previously, to a worn seal because of the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is achieved…
  • 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 oftentimes be restricted 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 respect with the manufacturer’s standards.

In all situations, these interventions are not inevitably complex, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Buick Envision, we encourage you to get closer to your auto technician to avoid any bad manipulation that could seriously harm the condition of your Buick Envision.

Whenever you have any additional questions about the Buick Envision, do not hesitate to consult our Buick Envision category.