In cases where you are informed of abnormal signs on your automobile, you are right to be intrigued, because a car represents a massive annual budget and sudden breakdowns don’t reduce the bill. So what if you feel like you have a leaking injector on your saab 9 3? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three manifestations are the main symptoms of a leaking injector. As this problem can produce more significant engine complications on your car, we chose to write this content to help you verify the failure of a leaking injector and treat it properly. To achieve this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors saab 9 3.

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Leaking injector on my petrol saab 9 3

It is essential to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two kind 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 saab 9 3: The different leaks

It should be noted that injector leaks on a saab 9 3 equipped with a petrol engine are rather infrequent. This is due to 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 conceivable 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:
    Finally, you may encounter 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 saab 9 3

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure generates 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 saab 9 3: The different leaks

In the case of leaking diesel injectors on your saab 9 3, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform over time, usually 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 saab 9 3 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 find an air noise and a compression loss.
  • If after checking you have oil leaking but it does not come from your injectors, we encourage you to browse this content on the presence of oil leaking on your saab 9 3.

Leaking injector on my saab 9 3, 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 linked, as we have seen prior to this, 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 achieved…
  • 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 regularly be restricted to replacing the seals that have failed:

  • Identify the source of the leak
  • Take apart the injector in question
  • Change the corresponding seal kit
  • Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.

In all situations, these interventions are not necessarily very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your saab 9 3, we encourage you to get closer to your auto mechanic to avoid any bad handling that could seriously harm the condition of your saab 9 3.

If you need more guides on the saab 9 3, go to our saab 9 3 category.