In the event that you are informed of abnormal symptoms on your automobile, you are right to be worried, because a car represents a big annual budget and unforeseen malfunctions don’t lower the costs. So what if you feel as if you have a leaking injector on your BMW 5 Series? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three manifestations are the main signals of a leaking injector. As this troubles can cause more serious engine problems on your car, we thought we would prepare this article content to help you confirm the failure of a leaking injector and handle it correctly. To do so, we will first of all check out the case of gasoline injectors and then at those of diesel injectors BMW 5 Series.
Leaking injector on my petrol BMW 5 Series
It is essential to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two types of engines makes the injection different. The key 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 5 Series: The different leaks
It should be noted that injector leaks on a BMW 5 Series equipped with a petrol engine are pretty rare. This is because of the much lower pressure in the petrol intake systems. However, 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 part that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may suffer a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel BMW 5 Series
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system generates 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 5 Series: The different leaks
In the case of leaking diesel injectors on your BMW 5 Series, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, 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 BMW 5 Series will be caused by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should experience 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 content on the presence of oil leaking on your BMW 5 Series.
Leaking injector on my BMW 5 Series, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is conducted…
- Masking 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 frequently be restricted to changing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all cases, these interventions are not necessarily difficult, but if you have the tiniest hesitation in the treatment of your injector that leaks on your BMW 5 Series, we encourage you to get closer to your auto technician to avoid any bad manipulation that could seriously harm the condition of your BMW 5 Series.
If you wish more guides on the BMW 5 Series, go to our BMW 5 Series category.
