In the event you are informed of abnormal signs on your vehicle, you are right to be preoccupied, because a car represents a big annual budget and unexpected malfunctions don’t lower the costs. So what if you feel as if you have a leaking injector on your Audi A5? You most likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or abnormal black smoke. These three manifestations are the main signals of a leaking injector. As this problem can produce more serious engine concerns on your car, we made a decision to publish this article content to help you confirm the failure of a leaking injector and handle it correctly. To accomplish this, we will first check out the circumstance of gasoline injectors and then at those of diesel injectors Audi A5.
Leaking injector on my petrol Audi A5
It is essential to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two sort of engines makes the injection different. The key 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 A5: The different leaks
It should be said that injector leaks on a Audi A5 equipped with a petrol engine are rather rare. This is as a result of 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 portion that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may experience a leak coming from the lower part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Audi A5
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Audi A5: The different leaks
In the circumstance of leaking diesel injectors on your Audi A5, there are three several sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform in the long run, generally the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Audi A5 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 encounter an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we recommend you to read this article content on the existence of oil leaking on your Audi A5.
Leaking injector on my Audi A5, how to fix the leak
And to finish, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is connected, as we have seen previously, 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 precautions:
- 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:
- Discover the source of the leak
- Dismantle the injector in question
- Replace 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 specifically complicated, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Audi A5, we recommend you to get closer to your mechanic to avoid any bad handling that could critically harm the condition of your Audi A5.
If you wish more guides on the Audi A5, go to our Audi A5 category.
