If you are alert of unusual signs on your vehicle, you are right to be worried, because a car represents a big annual budget and unexpected breakdowns don’t reduce the costs. So what if you think that you have a leaking injector on your Fiat Tipo? You probably figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or strange black smoke. These three signs of illness are the main symptoms of a leaking injector. As this failure can lead to more severe engine trouble on your car, we decided to write this content page to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first look at the case of gasoline injectors and then at those of diesel injectors Fiat Tipo.
Leaking injector on my petrol Fiat Tipo
It is fundamental 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 main 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 Tipo: The different leaks
It should be said that injector leaks on a Fiat Tipo equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, 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 part that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may encounter 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 Fiat Tipo
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 Tipo: The different leaks
In the case of leaking diesel injectors on your Fiat Tipo, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform after a while, in most cases 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 Tipo will be brought on 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 checking you have oil leaking but it does not come from your injectors, we suggest you to browse this content page on the presence of oil leaking on your Fiat Tipo.
Leaking injector on my Fiat Tipo, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen sooner, to a worn seal due to the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is completed…
- 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 regularly be restricted 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 respect with the manufacturer’s standards.
In all cases, these interventions are not inevitably complex, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Fiat Tipo, we suggest you to get closer to your auto technician to avoid any bad manipulation that could severely harm the condition of your Fiat Tipo.
If you need more tutorials on the Fiat Tipo, go to our Fiat Tipo category.
