In the event you are informed of abnormal symptoms on your automobile, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the bill. So what if you feel like you have a leaking injector on your Ds Ds 3? You most 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 signs of a leaking injector. As this failure can cause more significant engine problems on your car, we made a decision to publish this article to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Ds Ds 3.


Leaking injector on my petrol Ds Ds 3

It is fundamental 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 Ds Ds 3: The different leaks

It should be mentioned that injector leaks on a Ds Ds 3 equipped with a petrol engine are rather rare. This is resulting from 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 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:
    At last, you may encounter a leak coming from the lower part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Ds Ds 3

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 Ds Ds 3: The different leaks

In the circumstance of leaking diesel injectors on your Ds Ds 3, there are three several kind of leaks:

  • Leakage from the injector inlet:
    In this case, 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 implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Ds Ds 3 will be caused by 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 encounter 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 browse this article on the presence of oil leaking on your Ds Ds 3.

Leaking injector on my Ds Ds 3, how to fix the leak

And at last, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen previously, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some measures:

  • Lower the pressure before any work is achieved…
  • Masking 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 very often be limited to swapping the seals that have failed:

  • Discover the source of the leak
  • Dismantle the injector in question
  • Change the corresponding seal kit
  • Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.

In all situations, these interventions are not necessarily very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Ds Ds 3, we suggest you to get closer to your auto mechanic to avoid any bad handling that could significantly harm the condition of your Ds Ds 3.

Whenever you have any additional questions about the Ds Ds 3, do not hesitate to consult our Ds Ds 3 category.