In cases where you are aware of unusual symptoms on your vehicle, you are right to be worried, because a car represents a massive annual budget and sudden breakdowns don’t lower the expenses. So what if you feel like you have a leaking injector on your Volkswagen Fox? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or uncommon black smoke. These three signs of illness are the main symptoms of a leaking injector. As this failure can produce more significant engine trouble on your car, we chose to prepare this content to help you ensure the failure of a leaking injector and handle it correctly. To achieve this, we will first of all check out the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen Fox.
Leaking injector on my petrol Volkswagen Fox
It is crucial 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 biggest 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 Volkswagen Fox: The different leaks
It should be said that injector leaks on a Volkswagen Fox equipped with a petrol engine are rather infrequent. This is resulting from 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 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 Fox
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 Volkswagen Fox: The different leaks
In the circumstance of leaking diesel injectors on your Volkswagen Fox, there are three different 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 reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Fox 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we encourage you to browse this content on the presence of oil leaking on your Volkswagen Fox.
Leaking injector on my Volkswagen Fox, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Very often a leak is associated, as we have seen previously, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- Covering 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 oftentimes be limited to swapping the seals that have failed:
- Find the source of the leak
- Dismantle the injector in question
- Change the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not inevitably complicated, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Volkswagen Fox, we encourage you to get closer to your mechanic to avoid any bad handling that could critically harm the condition of your Volkswagen Fox.
To find more tips on the Volkswagen Fox, take a look at the Volkswagen Fox category.
