Whenever you are alert of irregular signs on your vehicle, you are right to be concerned, because a car represents a big annual budget and unexpected malfunctions don’t lower the bill. So what if you think that you have a leaking injector on your Mercedes Benz CLS Class? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main indicators of a leaking injector. As this troubles can bring about more significant engine complications on your car, we thought we would compose this article content to help you confirm the failure of a leaking injector and treat it properly. To do this, we will initially take a look at the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Benz CLS Class.
Leaking injector on my petrol Mercedes Benz CLS Class
It is crucial to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two types 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 CLS Class: The different leaks
It should be said that injector leaks on a Mercedes Benz CLS Class equipped with a petrol engine are rather rare. This is because of the much lower pressure in the petrol intake systems. Nevertheless, 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 portion that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may experience a leak coming from the lower part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mercedes Benz CLS Class
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Benz CLS Class: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Benz CLS Class, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with 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 Mercedes Benz CLS 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 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 examining you have oil leaking but it does not come from your injectors, we encourage you to consult this article content on the presence of oil leaking on your Mercedes Benz CLS Class.
Leaking injector on my Mercedes Benz CLS Class, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen previously, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is done…
- 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 regularly be limited to changing the seals that have failed:
- Situate the source of the leak
- Take apart the injector in question
- Replace 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 very hard, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Mercedes Benz CLS Class, we encourage you to get closer to your repair shop to avoid any bad manipulation that could critically harm the condition of your Mercedes Benz CLS Class.
To discover more tips on the Mercedes Benz CLS Class, take a look at the Mercedes Benz CLS Class category.
