In the event you are alert of abnormal signs on your automobile, you are right to be intrigued, because a car represents a massive annual budget and sudden malfunctions don’t lower the costs. So what if you sense that you have a leaking injector on your Volkswagen Polo 8? You probably 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 indicators of a leaking injector. As this problem can produce more serious engine problems on your car, we decided to compose this content page to help you verify the failure of a leaking injector and deal with it properly. To do so, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Volkswagen Polo 8.
Leaking injector on my petrol Volkswagen Polo 8
It is important to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types 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 Polo 8: The different leaks
It should be mentioned that injector leaks on a Volkswagen Polo 8 equipped with a petrol engine are rather infrequent. This is as a result of the much lower pressure in the petrol intake systems. Nevertheless, there are two types 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 component 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 Polo 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 Polo 8: The different leaks
In the case of leaking diesel injectors on your Volkswagen Polo 8, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, commonly the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Polo 8 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 advise you to read this content page on the existence of oil leaking on your Volkswagen Polo 8.
Leaking injector on my Volkswagen Polo 8, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is connected, as we have seen previously, to a worn seal because of the pressures suffered. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is achieved…
- Covering 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 frequently be restricted to changing the seals that have failed:
- Discover the source of the leak
- Take apart the injector in question
- Change 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 complex, but if you have the tiniest doubt in the treatment of your injector that leaks on your Volkswagen Polo 8, we advise you to get closer to your repair shop to avoid any bad manipulation that could critically harm the condition of your Volkswagen Polo 8.
To find more tips on the Volkswagen Polo 8, take a look at the Volkswagen Polo 8 category.
