If you are aware of abnormal signs on your automobile, you are right to be worried, because a car represents a huge annual budget and sudden breakdowns don’t lower the bill. So what if you feel as if you have a leaking injector on your BMW X5? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or uncommon black smoke. These three symptoms are the main indicators of a leaking injector. As this failure can bring about more severe engine trouble on your car, we thought we would publish this content page to help you verify the failure of a leaking injector and treat it properly. To do this, we will first of all look at the case of gasoline injectors and then at those of diesel injectors BMW X5.
Leaking injector on my petrol BMW X5
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 kind of engines makes the injection distinct. The main 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 X5: The different leaks
It should be known that injector leaks on a BMW X5 equipped with a petrol engine are rather rare. This is as a result of the much lower pressure in the petrol intake systems. However, there are two kind 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 connected 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 part 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 BMW X5
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 X5: The different leaks
In the case of leaking diesel injectors on your BMW X5, there are three different kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform in the long run, commonly 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 X5 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 bothersome, 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 read this content page on the existence of oil leaking on your BMW X5.
Leaking injector on my BMW X5, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Very often a leak is linked, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is enormous, specifically 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.
Regarding the repair part of your leak, it will frequently be restricted to swapping 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 situations, these interventions are not specifically complicated, but if you have the smallest hesitation in the treatment of your injector that leaks on your BMW X5, we recommend you to get closer to your auto mechanic to avoid any bad handling that could severely harm the condition of your BMW X5.
If you need more guides on the BMW X5, go to our BMW X5 category.
