In cases where you are alert of abnormal signs on your car, you are right to be worried, because a car represents a massive annual budget and sudden malfunctions don’t reduce the costs. So what if you find that you have a leaking injector on your Citroen C4 Picasso 2? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three symptoms are the main signals of a leaking injector. As this troubles can bring on more significant engine problems on your car, we made a decision to compose this content to help you confirm the failure of a leaking injector and deal with it correctly. To do so, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Citroen C4 Picasso 2.
Leaking injector on my petrol Citroen C4 Picasso 2
It is essential to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two kind of engines makes the injection different. The main 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 Citroen C4 Picasso 2: The different leaks
It should be mentioned that injector leaks on a Citroen C4 Picasso 2 equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. Nevertheless, 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 linked 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 occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Citroen C4 Picasso 2
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 Citroen C4 Picasso 2: The different leaks
In the case of leaking diesel injectors on your Citroen C4 Picasso 2, there are three different kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform along with time, in most cases 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 Citroen C4 Picasso 2 will be caused by 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 feel 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 content on the presence of oil leaking on your Citroen C4 Picasso 2.
Leaking injector on my Citroen C4 Picasso 2, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen sooner, to a worn seal because of the pressures suffered. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is done…
- 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 frequently be limited to replacing the seals that have failed:
- Identify the source of the leak
- Dismantle 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 cases, these interventions are not inevitably very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Citroen C4 Picasso 2, we encourage you to get closer to your auto mechanic to avoid any bad handling that could severely harm the condition of your Citroen C4 Picasso 2.
If you have any additional questions about the Citroen C4 Picasso 2, do not hesitate to consult our Citroen C4 Picasso 2 category.
