If you are aware of unusual signs on your car, you are right to be concerned, because a car represents a big annual budget and surprising malfunctions don’t lower the expenses. So what if you sense that you have a leaking injector on your Citroen Grand C4 Picasso? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three symptoms are the main indicators of a leaking injector. As this troubles can bring about more critical engine trouble on your car, we decided to produce this article content to help you verify the failure of a leaking injector and treat it correctly. To do so, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Citroen Grand C4 Picasso.
Leaking injector on my petrol Citroen Grand C4 Picasso
It is essential to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two sort of engines makes the injection distinct. The main 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 Grand C4 Picasso: The different leaks
It should be said that injector leaks on a Citroen Grand C4 Picasso equipped with a petrol engine are rather infrequent. This is caused by 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 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 experience a leak coming from the lower part 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 Grand C4 Picasso
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Grand C4 Picasso: The different leaks
In the circumstance of leaking diesel injectors on your Citroen Grand C4 Picasso, 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 suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Citroen Grand C4 Picasso 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 examining you have oil leaking but it does not come from your injectors, we advise you to consult this article content on the presence of oil leaking on your Citroen Grand C4 Picasso.
Leaking injector on my Citroen Grand C4 Picasso, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen prior to this, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is completed…
- Masking 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 restricted to changing the seals that have failed:
- Situate 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 necessarily difficult, but if you have the tiniest doubt in the treatment of your injector that leaks on your Citroen Grand C4 Picasso, we advise you to get closer to your repair shop to avoid any bad handling that could significantly harm the condition of your Citroen Grand C4 Picasso.
If you have any further questions about the Citroen Grand C4 Picasso, do not hesitate to consult our Citroen Grand C4 Picasso category.
