If you are informed of unusual symptoms on your car, you are right to be intrigued, because a car represents a big annual budget and surprising malfunctions don’t lower the costs. So what if you think that you have a leaking injector on your Mercedes Sprinter 2? You most likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unusual black smoke. These three signs of illness are the main signals of a leaking injector. As this troubles can produce more serious engine problems on your car, we chose to write this article to help you confirm the failure of a leaking injector and deal with it properly. To do so, we will first take a look at the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Sprinter 2.
Leaking injector on my petrol Mercedes Sprinter 2
It is essential to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two sort of engines makes the injection distinct. 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 Sprinter 2: The different leaks
It should be mentioned that injector leaks on a Mercedes Sprinter 2 equipped with a petrol engine are pretty infrequent. This is caused by the much lower pressure in the petrol intake systems. Even so, there are two sort 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 component 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 come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mercedes Sprinter 2
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 Sprinter 2: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Sprinter 2, there are three different sort 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 concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Sprinter 2 will be the result 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 checking you have oil leaking but it does not come from your injectors, we suggest you to read this article on the presence of oil leaking on your Mercedes Sprinter 2.
Leaking injector on my Mercedes Sprinter 2, 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. Oftentimes a leak is linked, as we have seen previously, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is done…
- 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 frequently be restricted to changing the seals that have failed:
- Locate the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not automatically difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Mercedes Sprinter 2, we suggest you to get closer to your motor mechanic to avoid any bad manipulation that could severely harm the condition of your Mercedes Sprinter 2.
If you need more tutorials on the Mercedes Sprinter 2, go to our Mercedes Sprinter 2 category.
