In cases where you are alert of abnormal signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unexpected breakdowns don’t lower the costs. So what if you think that you have a leaking injector on your Volkswagen Golf 6? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three signs of illness are the main signals of a leaking injector. As this troubles can cause more severe engine complications on your car, we decided to prepare this content to help you verify the failure of a leaking injector and deal with it properly. To do this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Golf 6.

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Leaking injector on my petrol Volkswagen Golf 6

It is essential to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two kind of engines makes the injection different. 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 Golf 6: The different leaks

It should be said that injector leaks on a Volkswagen Golf 6 equipped with a petrol engine are rather 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 possible that you have a leak from the top of the injector, this is the portion that is linked 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 appear from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Volkswagen Golf 6

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Golf 6: The different leaks

In the case of leaking diesel injectors on your Volkswagen Golf 6, there are three different kind of leaks:

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform along with time, in most cases 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 Volkswagen Golf 6 will be brought on by 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 experience an air noise and a compression loss.
  • If after verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this content on the existence of oil leaking on your Volkswagen Golf 6.

Leaking injector on my Volkswagen Golf 6, how to fix the leak

And finally, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is connected, 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, specifically on diesel engines. So you will have to take some safety measures:

  • Lower the pressure before any work is carried out…
  • Covering 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 oftentimes be limited to replacing the seals that have failed:

  • Find 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 cases, these interventions are not inevitably complicated, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Volkswagen Golf 6, we encourage you to get closer to your mechanic to avoid any bad manipulation that could severely harm the condition of your Volkswagen Golf 6.

To discover more tips on the Volkswagen Golf 6, take a look at the Volkswagen Golf 6 category.