If you are aware of irregular symptoms on your vehicle, you are right to be intrigued, because a car represents a big annual budget and sudden breakdowns don’t lower the costs. So what if you think that you have a leaking injector on your Volkswagen Scirocco? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can bring about more significant engine problems on your car, we decided to produce this article content to help you ensure the failure of a leaking injector and treat it properly. To do so, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Scirocco.
Leaking injector on my petrol Volkswagen Scirocco
It is vital to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two sort of engines makes the injection distinct. The biggest 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 Volkswagen Scirocco: The different leaks
It should be noted that injector leaks on a Volkswagen Scirocco equipped with a petrol engine are rather infrequent. This is because of the much lower pressure in the petrol intake systems. However, there are two sort of leaks:
- Leakage from the top of the injector:
It is possible that you have a leak from the top of the injector, this is the component that is connected 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 part of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Volkswagen Scirocco
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 Volkswagen Scirocco: The different leaks
In the case of leaking diesel injectors on your Volkswagen Scirocco, there are three several sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform over time, in most cases 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 Volkswagen Scirocco will be caused 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 browse this article content on the existence of oil leaking on your Volkswagen Scirocco.
Leaking injector on my Volkswagen Scirocco, 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 previously, to a worn seal because of the pressures suffered. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is completed…
- 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 limited to changing the seals that have failed:
- Find out 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 respect with the manufacturer’s standards.
In all cases, these interventions are not necessarily very hard, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Volkswagen Scirocco, we recommend you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Volkswagen Scirocco.
If you wish more guides on the Volkswagen Scirocco, go to our Volkswagen Scirocco category.
