If you are alert of unusual signs on your car, you are right to be worried, because a car represents a huge annual budget and surprising malfunctions don’t lower the expenses. So what if you think that you have a leaking injector on your Volkswagen Golf? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unusual black smoke. These three symptoms are the main indicators of a leaking injector. As this failure can bring about more severe engine complications on your car, we chose to compose this article content to help you ensure the failure of a leaking injector and handle it correctly. To do so, we will initially take a look at the circumstance of gasoline injectors and then at those of diesel injectors Volkswagen Golf.
Leaking injector on my petrol Volkswagen Golf
It is crucial to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two sort of engines makes the injection distinct. 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 Golf: The different leaks
It should be mentioned that injector leaks on a Volkswagen Golf equipped with a petrol engine are pretty infrequent. This is as a result of 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 part that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may encounter a leak coming from the lower part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Volkswagen Golf
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 Golf: The different leaks
In the circumstance of leaking diesel injectors on your Volkswagen Golf, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, 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 implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Golf 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 feel 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 article content on the existence of oil leaking on your Volkswagen Golf.
Leaking injector on my Volkswagen Golf, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Very often a leak is connected, as we have seen prior to this, 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 done…
- 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 limited to replacing the seals that have failed:
- Find out the source of the leak
- Dismantle 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 automatically complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Volkswagen Golf, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Volkswagen Golf.
Whenever you have any further questions about the Volkswagen Golf, do not hesitate to consult our Volkswagen Golf category.
