If you are alert of abnormal symptoms on your car, you are right to be worried, because a car represents a big annual budget and sudden breakdowns don’t reduce the expenses. So what if you find that you have a leaking injector on your Mercedes Actros? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can bring on more serious engine complications on your car, we decided to compose this content to help you confirm the failure of a leaking injector and treat it properly. To achieve this, we will first of all take a look at the case of gasoline injectors and then at those of diesel injectors Mercedes Actros.
Leaking injector on my petrol Mercedes Actros
It is fundamental 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 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 Actros: The different leaks
It should be said that injector leaks on a Mercedes Actros equipped with a petrol engine are rather rare. This is because of 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 plausible that you have a leak from the top of the injector, this is the portion that is linked 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 portion 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 Actros
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 Actros: The different leaks
In the case of leaking diesel injectors on your Mercedes Actros, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform over time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Actros 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 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 consult this content on the existence of oil leaking on your Mercedes Actros.
Leaking injector on my Mercedes Actros, how to fix the leak
And at last, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is conducted…
- Masking 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 very often be limited to replacing the seals that have failed:
- Find out the source of the leak
- Dismantle the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not specifically complicated, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Mercedes Actros, we advise you to get closer to your mechanic to avoid any bad handling that could seriously harm the condition of your Mercedes Actros.
If you wish more guides on the Mercedes Actros, go to our Mercedes Actros category.
