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 unpredicted malfunctions don’t lower the costs. So what if you find that you have a leaking injector on your Subaru Legacy? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or abnormal black smoke. These three manifestations are the main symptoms of a leaking injector. As this failure can cause more serious engine concerns on your car, we thought we would produce this article content to help you confirm the failure of a leaking injector and handle it properly. To accomplish this, we will first of all check out the circumstance of gasoline injectors and then at those of diesel injectors Subaru Legacy.
Leaking injector on my petrol Subaru Legacy
It is essential to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two types 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 Subaru Legacy: The different leaks
It should be noted that injector leaks on a Subaru Legacy equipped with a petrol engine are rather infrequent. This is because of the much lower pressure in the petrol intake systems. Nevertheless, there are two types 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 portion that is connected 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 come from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Subaru Legacy
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Subaru Legacy: The different leaks
In the circumstance of leaking diesel injectors on your Subaru Legacy, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform in the long run, generally 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 Subaru Legacy will be caused by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, 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 article content on the presence of oil leaking on your Subaru Legacy.
Leaking injector on my Subaru Legacy, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen previously, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is enormous, especially 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.
Concerning the repair part of your leak, it will regularly be restricted to changing 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 cases, these interventions are not automatically complex, but if you have the slightest hesitation in the treatment of your injector that leaks on your Subaru Legacy, we encourage you to get closer to your auto technician to avoid any bad handling that could significantly harm the condition of your Subaru Legacy.
To find more tips on the Subaru Legacy, take a look at the Subaru Legacy category.
