In the event you are alert of abnormal symptoms on your car, you are right to be concerned, because a car represents a huge annual budget and unforeseen malfunctions don’t reduce the expenses. So what if you think that you have a leaking injector on your Audi A1? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unusual black smoke. These three symptoms are the main signs of a leaking injector. As this problem can lead to more serious engine problems on your car, we thought we would produce this article to help you ensure the failure of a leaking injector and treat it correctly. To do this, we will initially take a look at the circumstance of gasoline injectors and then at those of diesel injectors Audi A1.
Leaking injector on my petrol Audi A1
It is crucial to know that the injectors on petrol and diesel engines are different, the truth is, 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 Audi A1: The different leaks
It should be said that injector leaks on a Audi A1 equipped with a petrol engine are pretty rare. This is as a result 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 plausible that you have a leak from the top of the injector, this is the part 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 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 Audi A1
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Audi A1: The different leaks
In the circumstance of leaking diesel injectors on your Audi A1, there are three different types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform after a while, 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 Audi A1 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 annoying, 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 examining you have oil leaking but it does not come from your injectors, we advise you to consult this article on the presence of oil leaking on your Audi A1.
Leaking injector on my Audi A1, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is gigantic, especially 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.
Relating to the repair part of your leak, it will regularly be restricted to replacing the seals that have failed:
- Identify 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not necessarily complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Audi A1, we advise you to get closer to your repair shop to avoid any bad manipulation that could severely harm the condition of your Audi A1.
If you wish more tutorials on the Audi A1, go to our Audi A1 category.
