Whenever you are aware of unusual symptoms on your vehicle, you are right to be worried, because a car represents a big annual budget and unexpected malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Volkswagen Transporter? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unusual black smoke. These three manifestations are the main signals of a leaking injector. As this failure can end up in more severe engine trouble on your car, we made a decision to produce this content page to help you verify the failure of a leaking injector and deal with it properly. To accomplish this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Transporter.

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Leaking injector on my petrol Volkswagen Transporter

It is important to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two sort of engines makes the injection distinct. 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 Volkswagen Transporter: The different leaks

It should be known that injector leaks on a Volkswagen Transporter equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. Even so, there are two sort 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 portion of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen sooner.

Leaking injector on my diesel Volkswagen Transporter

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 Volkswagen Transporter: The different leaks

In the case of leaking diesel injectors on your Volkswagen Transporter, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform with time, usually the leak will be at the clamping point.
  • Injector return leakage:
    As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Transporter 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 checking you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the presence of oil leaking on your Volkswagen Transporter.

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

And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen sooner, to a worn seal because of the pressures suffered. 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 done…
  • 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 changing the seals that have failed:

  • Discover 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 slightest hesitation in the treatment of your injector that leaks on your Volkswagen Transporter, we encourage you to get closer to your auto mechanic to avoid any bad manipulation that could severely harm the condition of your Volkswagen Transporter.

If perhaps you have any additional questions about the Volkswagen Transporter, do not hesitate to consult our Volkswagen Transporter category.