In cases where you are alert of irregular symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and unforeseen malfunctions don’t reduce the expenses. So what if you think that you have a leaking injector on your Subaru Outback? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can end up in more serious engine complications on your car, we made a decision to compose this content to help you validate the failure of a leaking injector and deal with it correctly. To accomplish this, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Subaru Outback.
Leaking injector on my petrol Subaru Outback
It is essential to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two sort of engines makes the injection distinct. The essential 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 Subaru Outback: The different leaks
It should be noted that injector leaks on a Subaru Outback equipped with a petrol engine are rather rare. This is caused by 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 conceivable 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 sooner.
Leaking injector on my diesel Subaru Outback
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 Subaru Outback: The different leaks
In the case of leaking diesel injectors on your Subaru Outback, there are three different sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform along with time, in most cases 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 Subaru Outback 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 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to browse this content on the presence of oil leaking on your Subaru Outback.
Leaking injector on my Subaru Outback, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is associated, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some safety 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.
Concerning the repair part of your leak, it will frequently be limited to replacing the seals that have failed:
- Situate the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all situations, these interventions are not inevitably complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Subaru Outback, we recommend you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Subaru Outback.
If you need more tutorials on the Subaru Outback, go to our Subaru Outback category.
