In cases where you are informed of irregular signs on your automobile, you are right to be preoccupied, because a car represents a massive annual budget and unexpected breakdowns don’t reduce the expenses. So what if you sense that you have a leaking injector on your Opel Agila? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can bring on more serious engine trouble on your car, we decided to write this article to help you validate the failure of a leaking injector and treat it correctly. To accomplish this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Opel Agila.
Leaking injector on my petrol Opel Agila
It is essential to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two types of engines makes the injection distinct. The key 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 Opel Agila: The different leaks
It should be noted that injector leaks on a Opel Agila equipped with a petrol engine are pretty infrequent. This is because of 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 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 suffer 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 sooner.
Leaking injector on my diesel Opel Agila
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 Opel Agila: The different leaks
In the circumstance of leaking diesel injectors on your Opel Agila, there are three different types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform in the long run, 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 Opel Agila will be caused by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most troublesome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should experience an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we encourage you to consult this article on the presence of oil leaking on your Opel Agila.
Leaking injector on my Opel Agila, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is connected, as we have seen prior to this, to a worn seal because of the pressures endured. 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 carried out…
- 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 very often be limited to swapping the seals that have failed:
- Find 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 situations, these interventions are not inevitably difficult, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Opel Agila, we encourage you to get closer to your repair shop to avoid any bad manipulation that could severely harm the condition of your Opel Agila.
If you need more tutorials on the Opel Agila, go to our Opel Agila category.
