In the event that you are informed of unusual signs on your car, you are right to be worried, because a car represents a big annual budget and unpredicted malfunctions don’t reduce the costs. So what if you feel like you have a leaking injector on your Volkswagen T-roc? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or unusual black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can lead to more severe engine concerns on your car, we chose to write this content to help you validate the failure of a leaking injector and handle it correctly. To achieve this, we will initially look into the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen T-roc.
Leaking injector on my petrol Volkswagen T-roc
It is vital to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two kind of engines makes the injection distinct. 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 T-roc: The different leaks
It should be mentioned that injector leaks on a Volkswagen T-roc equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. Even so, there are two kind 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 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 appear from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Volkswagen T-roc
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Volkswagen T-roc: The different leaks
In the circumstance of leaking diesel injectors on your Volkswagen T-roc, there are three different kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, generally 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 Volkswagen T-roc 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 troublesome, 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 advise you to browse this content on the existence of oil leaking on your Volkswagen T-roc.
Leaking injector on my Volkswagen T-roc, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen previously, to a worn seal because of the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is achieved…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Regarding the repair part of your leak, it will oftentimes be restricted to swapping the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Replace the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not specifically very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Volkswagen T-roc, we advise you to get closer to your mechanic to avoid any bad manipulation that could critically harm the condition of your Volkswagen T-roc.
If you want more guides on the Volkswagen T-roc, go to our Volkswagen T-roc category.
