In the event that you are informed of irregular signs on your car, you are right to be preoccupied, because a car represents a massive annual budget and unexpected malfunctions don’t reduce the bill. So what if you feel as if you have a leaking injector on your Volkswagen Golf 5? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or abnormal black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can cause more serious engine trouble on your car, we made a decision to write this article content to help you ensure the failure of a leaking injector and deal with it properly. To do so, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Volkswagen Golf 5.
Leaking injector on my petrol Volkswagen Golf 5
It is fundamental to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two kind of engines makes the injection different. The main 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 Golf 5: The different leaks
It should be said that injector leaks on a Volkswagen Golf 5 equipped with a petrol engine are rather infrequent. 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 possible 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 suffer 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 before.
Leaking injector on my diesel Volkswagen Golf 5
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 Golf 5: The different leaks
In the case of leaking diesel injectors on your Volkswagen Golf 5, there are three several kind 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 indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Golf 5 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to read this article content on the presence of oil leaking on your Volkswagen Golf 5.
Leaking injector on my Volkswagen Golf 5, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen sooner, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is enormous, 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 regularly be restricted to replacing the seals that have failed:
- Locate 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 accordance with the manufacturer’s standards.
In all cases, these interventions are not inevitably very hard, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Volkswagen Golf 5, we recommend you to get closer to your auto mechanic to avoid any bad manipulation that could severely harm the condition of your Volkswagen Golf 5.
If you have any additional questions about the Volkswagen Golf 5, do not hesitate to consult our Volkswagen Golf 5 category.
