In the event that you are informed of irregular symptoms on your car, you are right to be intrigued, because a car represents a big annual budget and surprising breakdowns don’t lower the expenses. So what if you feel like you have a leaking injector on your volvo v90? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three manifestations are the main signals of a leaking injector. As this problem can produce more significant engine problems on your car, we chose to publish this content to help you verify 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 v90.


Leaking injector on my petrol volvo v90

It is fundamental to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two sort of engines makes the injection different. The essential difference lies in the pressure experienced 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 v90: The different leaks

It should be mentioned that injector leaks on a volvo v90 equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. However, there are two sort 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 portion that is linked to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, you may experience 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 volvo v90

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 volvo v90: The different leaks

In the case of leaking diesel injectors on your volvo v90, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform in the long run, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your volvo v90 will be a consequence of 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 encounter an air noise and a compression loss.
  • If after examining 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 volvo v90.

Leaking injector on my volvo v90, 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 caused by 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…
  • Covering 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 frequently be restricted to replacing the seals that have failed:

  • Locate 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 respect with the manufacturer’s standards.

In all situations, these interventions are not automatically complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your volvo v90, we advise you to get closer to your repair shop to avoid any bad manipulation that could significantly harm the condition of your volvo v90.

In the event that you have any further questions about the volvo v90, do not hesitate to consult our volvo v90 category.