Whenever you are aware of unusual symptoms on your vehicle, you are right to be intrigued, because a car represents a massive annual budget and unexpected breakdowns don’t reduce the costs. So what if you find that you have a leaking injector on your Bmw Serie 7? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can end up in more significant engine problems on your car, we thought we would write this content to help you verify the failure of a leaking injector and handle it properly. To do this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Bmw Serie 7.
Leaking injector on my petrol Bmw Serie 7
It is fundamental to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two sort of engines makes the injection distinct. The biggest 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 Bmw Serie 7: The different leaks
It should be noted that injector leaks on a Bmw Serie 7 equipped with a petrol engine are pretty rare. This is due to 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 plausible that you have a leak from the top of the injector, this is the component 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 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 7
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 7: The different leaks
In the circumstance of leaking diesel injectors on your Bmw Serie 7, there are three different sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, generally 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 Bmw Serie 7 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 feel an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we suggest you to consult this content on the presence of oil leaking on your Bmw Serie 7.
Leaking injector on my Bmw Serie 7, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is associated, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- 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 regularly 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not specifically very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Bmw Serie 7, we suggest you to get closer to your motor mechanic to avoid any bad handling that could severely harm the condition of your Bmw Serie 7.
If you have any further questions about the Bmw Serie 7, do not hesitate to consult our Bmw Serie 7 category.
