In cases where you are aware of unusual signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unexpected breakdowns don’t reduce the costs. So what if you sense that you have a leaking injector on your Volkswagen Passat 8? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can bring about more severe engine trouble on your car, we chose to compose this article content to help you verify the failure of a leaking injector and deal with it properly. To do this, we will first look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Passat 8.
Leaking injector on my petrol Volkswagen Passat 8
It is essential to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two sort of engines makes the injection different. The key 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 Passat 8: The different leaks
It should be noted that injector leaks on a Volkswagen Passat 8 equipped with a petrol engine are rather rare. This is due to 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 plausible that you have a leak from the top of the injector, this is the portion that is connected 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 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 Volkswagen Passat 8
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 Volkswagen Passat 8: The different leaks
In the case of leaking diesel injectors on your Volkswagen Passat 8, 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, usually the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Passat 8 will be a consequence of 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 encounter an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we suggest you to consult this article content on the existence of oil leaking on your Volkswagen Passat 8.
Leaking injector on my Volkswagen Passat 8, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Very often a leak is associated, as we have seen sooner, to a worn seal because of the pressures endured. But think that the pressure in the circuit is gigantic, 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.
Relating to the repair part of your leak, it will very often be restricted to changing the seals that have failed:
- Identify 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 accordance with the manufacturer’s standards.
In all cases, these interventions are not automatically difficult, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Volkswagen Passat 8, we suggest you to get closer to your mechanic to avoid any bad handling that could severely harm the condition of your Volkswagen Passat 8.
If perhaps you have any further questions about the Volkswagen Passat 8, do not hesitate to consult our Volkswagen Passat 8 category.
