In the event that you are aware of abnormal symptoms on your car, you are right to be intrigued, because a car represents a massive annual budget and sudden breakdowns don’t reduce the bill. So what if you feel like you have a leaking injector on your Mercedes Sprinter? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or uncommon black smoke. These three symptoms are the main signals of a leaking injector. As this troubles can produce more significant engine problems on your car, we decided to produce this content page to help you verify the failure of a leaking injector and handle it properly. To do this, we will first take a look at the circumstance of gasoline injectors and then at those of diesel injectors Mercedes Sprinter.
Leaking injector on my petrol Mercedes Sprinter
It is important to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two types of engines makes the injection distinct. 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 Sprinter: The different leaks
It should be noted that injector leaks on a Mercedes Sprinter equipped with a petrol engine are rather rare. This is caused by 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 plausible that you have a leak from the top of the injector, this is the part that is attached 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 occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Mercedes Sprinter
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes Sprinter, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform in the long run, usually the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Mercedes Sprinter 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 find an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we advise you to consult this content page on the existence of oil leaking on your Mercedes Sprinter.
Leaking injector on my Mercedes Sprinter, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen sooner, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some precautions:
- 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.
Concerning the repair part of your leak, it will oftentimes be limited to changing the seals that have failed:
- Identify 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not inevitably complicated, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Mercedes Sprinter, we advise you to get closer to your auto mechanic to avoid any bad handling that could severely harm the condition of your Mercedes Sprinter.
If perhaps you have any additional questions about the Mercedes Sprinter, do not hesitate to consult our Mercedes Sprinter category.
