In the event you are informed of unusual signs on your car, you are right to be intrigued, because a car represents a massive annual budget and sudden breakdowns don’t lower the expenses. So what if you feel like you have a leaking injector on your Scion xB? You probably figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unconventional black smoke. These three manifestations are the main indicators of a leaking injector. As this problem can bring about more critical engine trouble on your car, we decided to produce this content page to help you ensure the failure of a leaking injector and treat it properly. To achieve this, we will first of all take a look at the circumstance of gasoline injectors and then at those of diesel injectors Scion xB.
Leaking injector on my petrol Scion xB
It is crucial to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two types 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 Scion xB: The different leaks
It should be noted that injector leaks on a Scion xB equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. However, there are two types 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 component that is connected 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 occur from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Scion xB
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 Scion xB: The different leaks
In the circumstance of leaking diesel injectors on your Scion xB, there are three several types 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 indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Scion xB 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 bothersome, 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to consult this content page on the presence of oil leaking on your Scion xB.
Leaking injector on my Scion xB, how to fix the leak
And at last, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is connected, 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 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.
Regarding the repair part of your leak, it will regularly be limited to replacing the seals that have failed:
- Discover the source of the leak
- Dismantle 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 cases, these interventions are not necessarily complex, but if you have the slightest doubt in the treatment of your injector that leaks on your Scion xB, we recommend you to get closer to your motor mechanic to avoid any bad handling that could seriously harm the condition of your Scion xB.
To find more tips on the Scion xB, take a look at the Scion xB category.
