If you are informed of irregular signs on your car, you are right to be worried, because a car represents a massive annual budget and unpredicted breakdowns don’t reduce the bill. So what if you find that you have a leaking injector on your Skoda Karoq? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three signs of illness are the main signals of a leaking injector. As this troubles can bring about more significant engine concerns on your car, we thought we would prepare this article to help you ensure the failure of a leaking injector and deal with it properly. To accomplish this, we will first look into the case of gasoline injectors and then at those of diesel injectors Skoda Karoq.


Leaking injector on my petrol Skoda Karoq

It is crucial to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two types of engines makes the injection distinct. The essential 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 Skoda Karoq: The different leaks

It should be said that injector leaks on a Skoda Karoq equipped with a petrol engine are rather infrequent. This is due to the much lower pressure in the petrol intake systems. Nevertheless, 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 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 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 Skoda Karoq

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Skoda Karoq: The different leaks

In the case of leaking diesel injectors on your Skoda Karoq, there are three several types of leaks:

  • Leakage from the injector inlet:
    In this instance, 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 implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Skoda Karoq will be caused by 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 find 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 consult this article on the existence of oil leaking on your Skoda Karoq.

Leaking injector on my Skoda Karoq, how to fix the leak

And to finish, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some precautions:

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

  • Locate the source of the leak
  • Take apart 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 cases, these interventions are not inevitably complex, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Skoda Karoq, we advise you to get closer to your repair shop to avoid any bad handling that could severely harm the condition of your Skoda Karoq.

If you wish more tutorials on the Skoda Karoq, go to our Skoda Karoq category.