In cases where you are aware of irregular signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unpredicted malfunctions don’t reduce the costs. So what if you think that you have a leaking injector on your Peugeot 4008? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or strange black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can cause more severe engine problems on your car, we thought we would produce this article to help you verify the failure of a leaking injector and deal with it correctly. To do so, we will initially look at the case of gasoline injectors and then at those of diesel injectors Peugeot 4008.
Leaking injector on my petrol Peugeot 4008
It is essential to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two kind of engines makes the injection distinct. 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 Peugeot 4008: The different leaks
It should be noted that injector leaks on a Peugeot 4008 equipped with a petrol engine are rather rare. This is because of the much lower pressure in the petrol intake systems. However, there are two kind 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 attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may experience a leak coming from the lower portion of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Peugeot 4008
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 Peugeot 4008: The different leaks
In the case of leaking diesel injectors on your Peugeot 4008, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform with time, commonly 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 Peugeot 4008 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 annoying, 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this article on the existence of oil leaking on your Peugeot 4008.
Leaking injector on my Peugeot 4008, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Very often a leak is linked, as we have seen sooner, to a worn seal because of 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 done…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will regularly be restricted to changing the seals that have failed:
- Find out 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 situations, these interventions are not automatically very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Peugeot 4008, we encourage you to get closer to your mechanic to avoid any bad manipulation that could severely harm the condition of your Peugeot 4008.
If you wish more tutorials on the Peugeot 4008, go to our Peugeot 4008 category.
