In the event that you are aware of irregular signs on your car, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Volkswagen Lupo? You most likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or abnormal black smoke. These three manifestations are the main indicators of a leaking injector. As this problem can bring about more serious engine problems on your car, we chose to publish this content to help you verify the failure of a leaking injector and handle it properly. To do so, we will first check out the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen Lupo.

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Leaking injector on my petrol Volkswagen Lupo

It is fundamental to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two types 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 Lupo: The different leaks

It should be known that injector leaks on a Volkswagen Lupo equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. Even so, there are two types 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 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 come from the junction with the engine and not with the rail as seen before.

Leaking injector on my diesel Volkswagen Lupo

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 Lupo: The different leaks

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

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform in the long run, 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 Lupo 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 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 examining you have oil leaking but it does not come from your injectors, we advise you to browse this content on the existence of oil leaking on your Volkswagen Lupo.

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

And finally, we’re going to check out how to fix a leaking injector on your car. Very often a leak is linked, as we have seen previously, to a worn seal because of the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some safety measures:

  • Lower the pressure before any work is achieved…
  • 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 regularly be restricted to replacing the seals that have failed:

  • Identify 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 accordance with the manufacturer’s standards.

In all cases, these interventions are not inevitably complex, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Volkswagen Lupo, we advise you to get closer to your repair shop to avoid any bad manipulation that could significantly harm the condition of your Volkswagen Lupo.

To get more tips on the Volkswagen Lupo, take a look at the Volkswagen Lupo category.