Whenever you are alert of abnormal signs on your automobile, you are right to be preoccupied, because a car represents a huge annual budget and unpredicted breakdowns don’t lower the costs. So what if you feel like you have a leaking injector on your Fiat Punto? You likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three symptoms are the main symptoms of a leaking injector. As this problem can cause more severe engine complications on your car, we thought we would publish this article content to help you confirm the failure of a leaking injector and handle it properly. To do so, we will first look at the case of gasoline injectors and then at those of diesel injectors Fiat Punto.
Leaking injector on my petrol Fiat Punto
It is essential 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 biggest difference lies in the pressure experienced 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 Punto: The different leaks
It should be known that injector leaks on a Fiat Punto equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. However, there are two kind of leaks:
- Leakage from the top of the injector:
It is possible that you have a leak from the top of the injector, this is the portion that is linked 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 part 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 Fiat Punto
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure produces 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 Punto: The different leaks
In the case of leaking diesel injectors on your Fiat Punto, there are three several kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with time, usually 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 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 encounter an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we encourage you to browse this article content on the existence of oil leaking on your Fiat Punto.
Leaking injector on my Fiat Punto, how to fix the leak
And finally, we’re going to look at 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 suffered. 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 completed…
- Masking 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 very often be restricted to replacing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not inevitably very hard, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Fiat Punto, we encourage you to get closer to your repair shop to avoid any bad manipulation that could severely harm the condition of your Fiat Punto.
If you need more guides on the Fiat Punto, go to our Fiat Punto category.
