Whenever you are aware of abnormal signs on your automobile, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the bill. So what if you feel as if you have a leaking injector on your Mercedes Benz C Class? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three symptoms are the main signs of a leaking injector. As this problem can lead to more serious engine problems on your car, we chose to produce this article content to help you ensure the failure of a leaking injector and treat it properly. To do so, we will initially look at the case of gasoline injectors and then at those of diesel injectors Mercedes Benz C Class.


Leaking injector on my petrol Mercedes Benz C Class

It is vital 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 biggest 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 Benz C Class: The different leaks

It should be noted that injector leaks on a Mercedes Benz C Class equipped with a petrol engine are rather rare. This is caused by 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 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:
    At last, you may suffer a leak coming from the lower portion 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 Benz C Class

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 Mercedes Benz C Class: The different leaks

In the case of leaking diesel injectors on your Mercedes Benz C Class, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform over time, in most cases 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 C Class 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 troublesome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should experience an air noise and a compression loss.
  • If after verifying you have oil leaking but it does not come from your injectors, we advise you to browse this article content on the existence of oil leaking on your Mercedes Benz C Class.

Leaking injector on my Mercedes Benz C Class, how to fix the leak

And at last, we’re going to look at 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 endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some measures:

  • Lower the pressure before any work is achieved…
  • Covering 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 replacing the seals that have failed:

  • Situate 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 accordance with the manufacturer’s standards.

In all cases, these interventions are not inevitably complex, but if you have the smallest hesitation in the treatment of your injector that leaks on your Mercedes Benz C Class, we advise you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Mercedes Benz C Class.

If you need more guides on the Mercedes Benz C Class, go to our Mercedes Benz C Class category.