Whenever you are alert of irregular signs on your vehicle, you are right to be preoccupied, because a car represents a big annual budget and unforeseen breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Volkswagen Routan? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or uncommon black smoke. These three symptoms are the main indicators of a leaking injector. As this failure can cause more significant engine concerns on your car, we made a decision to produce this content page to help you validate the failure of a leaking injector and handle it properly. To do so, we will first of all check out the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen Routan.


Leaking injector on my petrol Volkswagen Routan

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

It should be known that injector leaks on a Volkswagen Routan equipped with a petrol engine are pretty infrequent. This is because of the much lower pressure in the petrol intake systems. However, 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 experience 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 before.

Leaking injector on my diesel Volkswagen Routan

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 Routan: The different leaks

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

  • Leakage from the injector inlet:
    In this case, it is an inlet pipe that will deform along with time, commonly the leak will be at the clamping point.
  • Injector return leakage:
    As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Routan 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to read this content page on the existence of oil leaking on your Volkswagen Routan.

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

And to finish, we’re going to check out how to fix a leaking injector on your car. Very often a leak is connected, as we have seen prior to this, to a worn seal as a result 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 precautions:

  • Lower the pressure before any work is conducted…
  • 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 very often 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 assembly and tighten with a torque wrench in respect with the manufacturer’s standards.

In all cases, these interventions are not automatically very hard, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Volkswagen Routan, we encourage you to get closer to your mechanic to avoid any bad handling that could significantly harm the condition of your Volkswagen Routan.

If you need more guides on the Volkswagen Routan, go to our Volkswagen Routan category.