In cases where you are alert of abnormal signs on your automobile, you are right to be worried, because a car represents a big annual budget and unforeseen breakdowns don’t lower the costs. So what if you find that you have a leaking injector on your Volkswagen Touran? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three signs of illness are the main indicators of a leaking injector. As this problem can produce more critical engine concerns on your car, we decided to publish this article content to help you validate the failure of a leaking injector and handle it properly. To do this, we will first look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Touran.

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Leaking injector on my petrol Volkswagen Touran

It is vital to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two kind of engines makes the injection distinct. The biggest 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 Touran: The different leaks

It should be said that injector leaks on a Volkswagen Touran equipped with a petrol engine are pretty infrequent. This is caused by 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 plausible that you have a leak from the top of the injector, this is the portion that is connected to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, 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 Volkswagen Touran

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure creates 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 Touran: The different leaks

In the case of leaking diesel injectors on your Volkswagen Touran, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform after a while, in most cases 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 Volkswagen Touran 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 troublesome, 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to consult this article content on the existence of oil leaking on your Volkswagen Touran.

Leaking injector on my Volkswagen Touran, 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 previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is monumental, specifically 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 frequently be restricted to replacing the seals that have failed:

  • Identify 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 slightest doubt in the treatment of your injector that leaks on your Volkswagen Touran, we recommend you to get closer to your auto technician to avoid any bad manipulation that could seriously harm the condition of your Volkswagen Touran.

In the event that you have any further questions about the Volkswagen Touran, do not hesitate to consult our Volkswagen Touran category.