Whenever you are alert of unusual symptoms on your automobile, you are right to be preoccupied, because a car represents a huge annual budget and unpredicted malfunctions don’t reduce the costs. So what if you think that you have a leaking injector on your Volvo Xc40? You likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unusual black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can lead to more serious engine complications on your car, we decided to publish this article to help you ensure the failure of a leaking injector and deal with it correctly. To accomplish this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Volvo Xc40.

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Leaking injector on my petrol Volvo Xc40

It is vital to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two sort 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 Volvo Xc40: The different leaks

It should be known that injector leaks on a Volvo Xc40 equipped with a petrol engine are pretty infrequent. This is because of the much lower pressure in the petrol intake systems. Even so, there are two sort 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 attached to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    At last, you may encounter 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 previously.

Leaking injector on my diesel Volvo Xc40

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 Volvo Xc40: The different leaks

In the case of leaking diesel injectors on your Volvo Xc40, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform after a while, generally 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 Volvo Xc40 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 feel an air noise and a compression loss.
  • If after checking you have oil leaking but it does not come from your injectors, we recommend you to read this article on the existence of oil leaking on your Volvo Xc40.

Leaking injector on my Volvo Xc40, how to fix the leak

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

  • Lower the pressure before any work is conducted…
  • 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 regularly be limited to swapping the seals that have failed:

  • Situate 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 very hard, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Volvo Xc40, we recommend you to get closer to your mechanic to avoid any bad handling that could seriously harm the condition of your Volvo Xc40.

Whenever you have any further questions about the Volvo Xc40, do not hesitate to consult our Volvo Xc40 category.