In the event that you are informed of irregular symptoms on your car, you are right to be intrigued, because a car represents a huge annual budget and unpredicted malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Bmw Serie 4 F33? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unconventional black smoke. These three manifestations are the main signals of a leaking injector. As this problem can cause more severe engine trouble on your car, we thought we would prepare this content page to help you validate the failure of a leaking injector and deal with it correctly. To achieve this, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Bmw Serie 4 F33.
Leaking injector on my petrol Bmw Serie 4 F33
It is fundamental to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two types of engines makes the injection different. The essential 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 4 F33: The different leaks
It should be said that injector leaks on a Bmw Serie 4 F33 equipped with a petrol engine are rather infrequent. This is as a result of the much lower pressure in the petrol intake systems. Even so, there are two types 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 portion 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 appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Bmw Serie 4 F33
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 Bmw Serie 4 F33: The different leaks
In the case of leaking diesel injectors on your Bmw Serie 4 F33, there are three several types of leaks:
- Leakage from the injector inlet:
In cases like this, 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 reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Bmw Serie 4 F33 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 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 examining you have oil leaking but it does not come from your injectors, we recommend you to browse this content page on the presence of oil leaking on your Bmw Serie 4 F33.
Leaking injector on my Bmw Serie 4 F33, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is connected, 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 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.
Relating to the repair part of your leak, it will regularly be limited to replacing 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 inevitably complicated, but if you have the tiniest doubt in the treatment of your injector that leaks on your Bmw Serie 4 F33, we recommend you to get closer to your motor mechanic to avoid any bad handling that could severely harm the condition of your Bmw Serie 4 F33.
In the event that you have any further questions about the Bmw Serie 4 F33, do not hesitate to consult our Bmw Serie 4 F33 category.
