Whenever you are informed of unusual symptoms on your automobile, you are right to be concerned, because a car represents a huge annual budget and surprising breakdowns don’t lower the costs. So what if you sense that you have a leaking injector on your Peugeot 308? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main indicators of a leaking injector. As this problem can bring about more severe engine trouble on your car, we thought we would publish this article content to help you verify the failure of a leaking injector and handle it properly. To achieve this, we will initially check out the case of gasoline injectors and then at those of diesel injectors Peugeot 308.

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Leaking injector on my petrol Peugeot 308

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 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 Peugeot 308: The different leaks

It should be known that injector leaks on a Peugeot 308 equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Even so, there are two sort of leaks:

  • Leakage from the top of the injector:
    It is conceivable 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 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 Peugeot 308

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Peugeot 308: The different leaks

In the case of leaking diesel injectors on your Peugeot 308, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform in the long run, 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 Peugeot 308 will be a consequence of 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 checking you have oil leaking but it does not come from your injectors, we advise you to consult this article content on the presence of oil leaking on your Peugeot 308.

Leaking injector on my Peugeot 308, how to fix the leak

And finally, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen sooner, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some 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 limited to changing 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 situations, these interventions are not necessarily difficult, but if you have the smallest doubt in the treatment of your injector that leaks on your Peugeot 308, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Peugeot 308.

If you need more tutorials on the Peugeot 308, go to our Peugeot 308 category.