Whenever you are informed of irregular signs on your automobile, you are right to be concerned, because a car represents a massive annual budget and unpredicted breakdowns don’t reduce the expenses. So what if you feel as if you have a leaking injector on your Citroen C4 Aircross? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three manifestations are the main signals of a leaking injector. As this problem can cause more serious engine trouble on your car, we thought we would compose this article content to help you verify the failure of a leaking injector and treat it properly. To achieve this, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Citroen C4 Aircross.
Leaking injector on my petrol Citroen C4 Aircross
It is crucial to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two kind of engines makes the injection distinct. 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 Citroen C4 Aircross: The different leaks
It should be noted that injector leaks on a Citroen C4 Aircross equipped with a petrol engine are rather rare. This is as a result of 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 plausible that you have a leak from the top of the injector, this is the portion that is connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may suffer 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 previously.
Leaking injector on my diesel Citroen C4 Aircross
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system generates 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 Aircross: The different leaks
In the case of leaking diesel injectors on your Citroen C4 Aircross, there are three several kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, usually the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Citroen C4 Aircross 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 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 consult this article content on the presence of oil leaking on your Citroen C4 Aircross.
Leaking injector on my Citroen C4 Aircross, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some precautions:
- 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.
Regarding the repair part of your leak, it will regularly be limited to changing the seals that have failed:
- Identify 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 respect with the manufacturer’s standards.
In all situations, these interventions are not inevitably difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Citroen C4 Aircross, we recommend you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Citroen C4 Aircross.
Whenever you have any further questions about the Citroen C4 Aircross, do not hesitate to consult our Citroen C4 Aircross category.
