In cases where you are informed of unusual signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unforeseen breakdowns don’t lower the expenses. So what if you find that you have a leaking injector on your Mercedes Classe G 3? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three manifestations are the main symptoms of a leaking injector. As this failure can lead to more severe engine trouble on your car, we chose to prepare this article content to help you verify the failure of a leaking injector and deal with it properly. To do so, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Classe G 3.
Leaking injector on my petrol Mercedes Classe G 3
It is crucial to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types of engines makes the injection different. The key 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 Mercedes Classe G 3: The different leaks
It should be mentioned that injector leaks on a Mercedes Classe G 3 equipped with a petrol engine are rather rare. This is resulting from 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 possible that you have a leak from the top of the injector, this is the part 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 experience 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 previously.
Leaking injector on my diesel Mercedes Classe G 3
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 Mercedes Classe G 3: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Classe G 3, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, commonly the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Classe G 3 will be brought on by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most troublesome, 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 examining you have oil leaking but it does not come from your injectors, we recommend you to browse this article content on the presence of oil leaking on your Mercedes Classe G 3.
Leaking injector on my Mercedes Classe G 3, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen previously, to a worn seal as a result of the pressures endured. 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…
- Covering 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 restricted to swapping the seals that have failed:
- Situate the source of the leak
- Dismantle 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 situations, these interventions are not automatically very hard, but if you have the slightest hesitation in the treatment of your injector that leaks on your Mercedes Classe G 3, we recommend you to get closer to your auto technician to avoid any bad handling that could significantly harm the condition of your Mercedes Classe G 3.
In the event that you have any additional questions about the Mercedes Classe G 3, do not hesitate to consult our Mercedes Classe G 3 category.
