In the event you are informed of abnormal symptoms on your automobile, you are right to be concerned, because a car represents a big annual budget and surprising breakdowns don’t reduce the bill. So what if you find that you have a leaking injector on your Mercedes A class? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can bring about more severe engine concerns on your car, we made a decision to compose this content to help you validate the failure of a leaking injector and treat it correctly. To achieve this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Mercedes A class.
Leaking injector on my petrol Mercedes A class
It is essential to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two sort of engines makes the injection different. The main 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 A class: The different leaks
It should be known that injector leaks on a Mercedes A class equipped with a petrol engine are rather infrequent. This is resulting from the much lower pressure in the petrol intake systems. However, there are two sort of leaks:
- Leakage from the top of the injector:
It is conceivable 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 encounter a leak coming from the lower portion 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 A class
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 A class: The different leaks
In the circumstance of leaking diesel injectors on your Mercedes A class, there are three several sort 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 relates to the management of the fuel return in the injector, this time the injector that leaks on your Mercedes A 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 troublesome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should encounter 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 content on the existence of oil leaking on your Mercedes A class.
Leaking injector on my Mercedes A class, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen previously, to a worn seal because of the pressures endured. 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 limited to changing the seals that have failed:
- Find out the source of the leak
- Dismantle the injector in question
- Replace the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not inevitably complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Mercedes A class, we encourage you to get closer to your auto technician to avoid any bad manipulation that could critically harm the condition of your Mercedes A class.
To find more tips on the Mercedes A class, take a look at the Mercedes A class category.
