In the event that you are alert of irregular signs on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unpredicted breakdowns don’t lower the costs. So what if you find that you have a leaking injector on your Mercedes Benz CLA Class? You most likely 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 symptoms of a leaking injector. As this problem can bring about more serious engine problems on your car, we made a decision to prepare this article content to help you validate the failure of a leaking injector and handle it properly. To do this, we will first look at the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Benz CLA Class.
Leaking injector on my petrol Mercedes Benz CLA Class
It is vital to know that the injectors on petrol and diesel engines are distinct, in fact, 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 CLA Class: The different leaks
It should be known that injector leaks on a Mercedes Benz CLA Class equipped with a petrol engine are pretty infrequent. This is because of the much lower pressure in the petrol intake systems. However, there are two kind 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 connected 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 part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Mercedes Benz CLA Class
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 Benz CLA Class: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Benz CLA Class, there are three different kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform along with time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Benz CLA 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 annoying, 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 checking 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 CLA Class.
Leaking injector on my Mercedes Benz CLA Class, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some safety 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.
Regarding the repair part of your leak, it will regularly be restricted to changing the seals that have failed:
- Identify the source of the leak
- Dismantle the injector in question
- Change 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 necessarily difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Mercedes Benz CLA Class, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Mercedes Benz CLA Class.
In the event that you have any additional questions about the Mercedes Benz CLA Class, do not hesitate to consult our Mercedes Benz CLA Class category.
