In the event that you are aware of unusual symptoms on your vehicle, you are right to be intrigued, because a car represents a big annual budget and sudden malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Audi Rs5? You probably figured it out thanks to black/oily drips along your engine, or a troubled idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this troubles can bring on more significant engine trouble on your car, we decided to publish this content to help you confirm the failure of a leaking injector and deal with it correctly. To achieve this, we will first of all take a look at the case of gasoline injectors and then at those of diesel injectors Audi Rs5.
Leaking injector on my petrol Audi Rs5
It is crucial 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 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 Audi Rs5: The different leaks
It should be known that injector leaks on a Audi Rs5 equipped with a petrol engine are pretty infrequent. This is due to 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 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:
At last, you may experience a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Audi Rs5
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 Rs5: The different leaks
In the case of leaking diesel injectors on your Audi Rs5, there are three different types of leaks:
- Leakage from the injector inlet:
In cases like this, 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 reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Audi Rs5 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 experience an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we suggest you to read this content on the presence of oil leaking on your Audi Rs5.
Leaking injector on my Audi Rs5, 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. Very often a leak is connected, as we have seen prior to this, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is done…
- Masking 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 frequently be restricted to swapping the seals that have failed:
- Find out the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not automatically difficult, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Audi Rs5, we suggest you to get closer to your repair shop to avoid any bad handling that could critically harm the condition of your Audi Rs5.
To get more tips on the Audi Rs5, take a look at the Audi Rs5 category.
