In the event you are alert of unusual signs on your car, you are right to be intrigued, because a car represents a huge annual budget and unexpected malfunctions don’t reduce the expenses. So what if you sense that you have a leaking injector on your Mercedes Gla? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or uncommon black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can produce more severe engine concerns on your car, we decided to produce this content to help you validate the failure of a leaking injector and deal with it properly. To achieve this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Mercedes Gla.
Leaking injector on my petrol Mercedes Gla
It is fundamental to know that the injectors on petrol and diesel engines are different, in reality, 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 Mercedes Gla: The different leaks
It should be noted that injector leaks on a Mercedes Gla equipped with a petrol engine are rather rare. This is due to the much lower pressure in the petrol intake systems. Even so, there are two types 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 part 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 portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Mercedes Gla
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Mercedes Gla: The different leaks
In the case of leaking diesel injectors on your Mercedes Gla, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform after a while, commonly the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Gla 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 find an air noise and a compression loss. - If after checking 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 Mercedes Gla.
Leaking injector on my Mercedes Gla, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen prior to this, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- Masking 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 swapping the seals that have failed:
- Situate 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 cases, these interventions are not necessarily difficult, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Mercedes Gla, we advise you to get closer to your mechanic to avoid any bad manipulation that could significantly harm the condition of your Mercedes Gla.
If you have any additional questions about the Mercedes Gla, do not hesitate to consult our Mercedes Gla category.
