In the event you are alert of abnormal signs on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unpredicted malfunctions don’t reduce the bill. So what if you sense that you have a leaking injector on your Fiat Grande Punto? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three manifestations are the main signs of a leaking injector. As this problem can lead to more severe engine concerns on your car, we thought we would write this article to help you ensure the failure of a leaking injector and treat it correctly. To achieve this, we will initially take a look at the circumstance of gasoline injectors and then at those of diesel injectors Fiat Grande Punto.
Leaking injector on my petrol Fiat Grande Punto
It is essential to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two types of engines makes the injection different. 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 Fiat Grande Punto: The different leaks
It should be known that injector leaks on a Fiat Grande Punto equipped with a petrol engine are pretty infrequent. This is because of the much lower pressure in the petrol intake systems. Even so, 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 attached 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 before.
Leaking injector on my diesel Fiat Grande Punto
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 Fiat Grande Punto: The different leaks
In the circumstance of leaking diesel injectors on your Fiat Grande Punto, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform with time, commonly 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 Fiat Grande Punto 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 feel 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 on the presence of oil leaking on your Fiat Grande Punto.
Leaking injector on my Fiat Grande Punto, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen previously, to a worn seal because of the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is done…
- 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 restricted to swapping the seals that have failed:
- Find out 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 smallest doubt in the treatment of your injector that leaks on your Fiat Grande Punto, we recommend you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Fiat Grande Punto.
Whenever you have any further questions about the Fiat Grande Punto, do not hesitate to consult our Fiat Grande Punto category.
