In the event you are aware of irregular symptoms on your car, you are right to be intrigued, because a car represents a massive annual budget and surprising malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Citroen C4? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or strange black smoke. These three manifestations are the main signs of a leaking injector. As this troubles can end up in more critical engine trouble on your car, we thought we would prepare this content to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first look into the case of gasoline injectors and then at those of diesel injectors Citroen C4.
Leaking injector on my petrol Citroen C4
It is crucial to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two sort 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: The different leaks
It should be mentioned that injector leaks on a Citroen C4 equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. However, 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 component that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may suffer 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 Citroen C4
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: The different leaks
In the case of leaking diesel injectors on your Citroen C4, there are three several sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform as time passes, generally the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Citroen C4 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 checking you have oil leaking but it does not come from your injectors, we encourage you to browse this content on the existence of oil leaking on your Citroen C4.
Leaking injector on my Citroen C4, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is conducted…
- 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 very often be limited to changing the seals that have failed:
- Locate 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 cases, these interventions are not specifically very hard, but if you have the slightest hesitation in the treatment of your injector that leaks on your Citroen C4, we encourage you to get closer to your repair shop to avoid any bad manipulation that could critically harm the condition of your Citroen C4.
If you wish more guides on the Citroen C4, go to our Citroen C4 category.
