In cases where you are informed of abnormal symptoms on your car, you are right to be worried, because a car represents a big annual budget and unpredicted breakdowns don’t reduce the expenses. So what if you feel like you have a leaking injector on your Volkswagen Rabbit? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unusual black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can end up in more critical engine problems on your car, we made a decision to write this content to help you confirm the failure of a leaking injector and handle it properly. To do so, we will first of all take a look at the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen Rabbit.

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Leaking injector on my petrol Volkswagen Rabbit

It is crucial 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 main 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 Volkswagen Rabbit: The different leaks

It should be mentioned that injector leaks on a Volkswagen Rabbit equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, there are two types of leaks:

  • Leakage from the top of the injector:
    It is conceivable 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 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 sooner.

Leaking injector on my diesel Volkswagen Rabbit

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 Volkswagen Rabbit: The different leaks

In the circumstance of leaking diesel injectors on your Volkswagen Rabbit, there are three different types of leaks:

  • Leakage from the injector inlet:
    In this case, 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 reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Rabbit 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 feel 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 on the presence of oil leaking on your Volkswagen Rabbit.

Leaking injector on my Volkswagen Rabbit, how to fix the leak

And finally, we’re going to take a look at how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen sooner, to a worn seal due to 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 carried out…
  • 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 frequently be restricted to swapping the seals that have failed:

  • Find 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 smallest hesitation in the treatment of your injector that leaks on your Volkswagen Rabbit, we recommend you to get closer to your mechanic to avoid any bad manipulation that could seriously harm the condition of your Volkswagen Rabbit.

Whenever you have any further questions about the Volkswagen Rabbit, do not hesitate to consult our Volkswagen Rabbit category.