In the event that you are aware of irregular symptoms on your vehicle, you are right to be worried, because a car represents a huge annual budget and unforeseen malfunctions don’t lower the expenses. So what if you find that you have a leaking injector on your Alfa Romeo 156? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unusual black smoke. These three signs of illness are the main signs of a leaking injector. As this troubles can bring about more significant engine trouble on your car, we decided to write this article content to help you ensure the failure of a leaking injector and treat it correctly. To do this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Alfa Romeo 156.
Leaking injector on my petrol Alfa Romeo 156
It is important to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two sort of engines makes the injection different. 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 Alfa Romeo 156: The different leaks
It should be noted that injector leaks on a Alfa Romeo 156 equipped with a petrol engine are pretty rare. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, 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 part that is connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may suffer a leak coming from the lower portion of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Alfa Romeo 156
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 Alfa Romeo 156: The different leaks
In the case of leaking diesel injectors on your Alfa Romeo 156, there are three several sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Alfa Romeo 156 will be the result of an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, 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 examining you have oil leaking but it does not come from your injectors, we advise you to consult this article content on the existence of oil leaking on your Alfa Romeo 156.
Leaking injector on my Alfa Romeo 156, 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 connected, as we have seen previously, to a worn seal due to the pressures suffered. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is achieved…
- 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 oftentimes be restricted to replacing the seals that have failed:
- Discover the source of the leak
- Take apart 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 situations, these interventions are not inevitably very hard, but if you have the smallest hesitation in the treatment of your injector that leaks on your Alfa Romeo 156, we advise you to get closer to your auto technician to avoid any bad manipulation that could severely harm the condition of your Alfa Romeo 156.
To find more tips on the Alfa Romeo 156, take a look at the Alfa Romeo 156 category.
