If you are informed of unusual signs on your automobile, you are right to be concerned, because a car represents a huge annual budget and unexpected breakdowns don’t lower the bill. So what if you find that you have a leaking injector on your Peugeot 508? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unusual black smoke. These three signs of illness are the main indicators of a leaking injector. As this troubles can bring on more critical engine complications on your car, we chose to write this article content to help you verify the failure of a leaking injector and treat it correctly. To do this, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Peugeot 508.
Leaking injector on my petrol Peugeot 508
It is vital to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two types of engines makes the injection different. 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 Peugeot 508: The different leaks
It should be mentioned that injector leaks on a Peugeot 508 equipped with a petrol engine are pretty infrequent. This is caused by the much lower pressure in the petrol intake systems. However, there are two types 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 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 part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Peugeot 508
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 508: The different leaks
In the case of leaking diesel injectors on your Peugeot 508, there are three several types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform along with time, generally the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Peugeot 508 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 find an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we suggest you to read this article content on the existence of oil leaking on your Peugeot 508.
Leaking injector on my Peugeot 508, how to fix the leak
And to finish, we’re going to 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 because of the pressures suffered. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is conducted…
- Masking 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 frequently be limited to replacing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not specifically complex, but if you have the tiniest doubt in the treatment of your injector that leaks on your Peugeot 508, we suggest you to get closer to your repair shop to avoid any bad manipulation that could significantly harm the condition of your Peugeot 508.
If you need more guides on the Peugeot 508, go to our Peugeot 508 category.
