In cases where you are informed of unusual symptoms on your vehicle, you are right to be preoccupied, because a car represents a massive annual budget and unforeseen breakdowns don’t reduce the costs. So what if you feel like you have a leaking injector on your Bmw Serie 6? You most likely figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can produce more significant engine concerns on your car, we chose to prepare this article to help you verify the failure of a leaking injector and handle it properly. To do this, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Bmw Serie 6.
Leaking injector on my petrol Bmw Serie 6
It is crucial to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two kind 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 Bmw Serie 6: The different leaks
It should be noted that injector leaks on a Bmw Serie 6 equipped with a petrol engine are rather infrequent. This is because of the much lower pressure in the petrol intake systems. Even so, there are two kind 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 portion that is linked 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 part of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Bmw Serie 6
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 Bmw Serie 6: The different leaks
In the circumstance of leaking diesel injectors on your Bmw Serie 6, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform as time passes, generally the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Bmw Serie 6 will be brought on by 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 feel 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 article on the presence of oil leaking on your Bmw Serie 6.
Leaking injector on my Bmw Serie 6, 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 sooner, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some precautions:
- 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 oftentimes be limited to changing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not necessarily complex, but if you have the smallest doubt in the treatment of your injector that leaks on your Bmw Serie 6, we encourage you to get closer to your auto technician to avoid any bad handling that could seriously harm the condition of your Bmw Serie 6.
If you have any additional questions about the Bmw Serie 6, do not hesitate to consult our Bmw Serie 6 category.
