If you are alert of unusual symptoms on your vehicle, you are right to be concerned, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the costs. So what if you feel like you have a leaking injector on your Mercedes Benz GL Class? You probably figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or uncommon black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can end up in more significant engine concerns on your car, we thought we would publish this article to help you validate the failure of a leaking injector and treat it properly. To accomplish this, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Benz GL Class.
Leaking injector on my petrol Mercedes Benz GL Class
It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two kind of engines makes the injection distinct. 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 Benz GL Class: The different leaks
It should be said that injector leaks on a Mercedes Benz GL Class equipped with a petrol engine are rather rare. This is as a result of 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:
At last, 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 Benz GL Class
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Mercedes Benz GL Class: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Benz GL Class, 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, generally 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 Mercedes Benz GL Class 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 browse this article on the existence of oil leaking on your Mercedes Benz GL Class.
Leaking injector on my Mercedes Benz GL Class, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Frequently 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 enormous, specifically on diesel engines. So you will have to take some precautions:
- 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.
Regarding the repair part of your leak, it will very often be restricted to swapping the seals that have failed:
- Locate 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 accordance with the manufacturer’s standards.
In all cases, these interventions are not automatically very hard, but if you have the slightest doubt in the treatment of your injector that leaks on your Mercedes Benz GL Class, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Mercedes Benz GL Class.
If you need more guides on the Mercedes Benz GL Class, go to our Mercedes Benz GL Class category.
