In cases where you are aware of unusual signs on your automobile, you are right to be worried, because a car represents a big annual budget and unpredicted malfunctions don’t lower the costs. So what if you sense that you have a leaking injector on your Porsche Macan? You likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three manifestations are the main indicators of a leaking injector. As this failure can produce more serious engine problems on your car, we thought we would prepare this content page to help you verify the failure of a leaking injector and deal with it correctly. To achieve this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Porsche Macan.

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Leaking injector on my petrol Porsche Macan

It is fundamental to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two kind of engines makes the injection distinct. The key 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 Porsche Macan: The different leaks

It should be mentioned that injector leaks on a Porsche Macan 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 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 component 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 part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.

Leaking injector on my diesel Porsche Macan

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 Porsche Macan: The different leaks

In the case of leaking diesel injectors on your Porsche Macan, there are three several kind of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform after a while, commonly 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 Porsche Macan 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 checking you have oil leaking but it does not come from your injectors, we recommend you to read this content page on the presence of oil leaking on your Porsche Macan.

Leaking injector on my Porsche Macan, how to fix the leak

And to finish, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen sooner, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some precautions:

  • 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.

Regarding the repair part of your leak, it will oftentimes be restricted to swapping 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 accordance with the manufacturer’s standards.

In all cases, these interventions are not necessarily complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Porsche Macan, we recommend you to get closer to your auto mechanic to avoid any bad handling that could significantly harm the condition of your Porsche Macan.

To find more tips on the Porsche Macan, take a look at the Porsche Macan category.