If you are aware of unusual signs on your automobile, you are right to be concerned, because a car represents a massive annual budget and unpredicted breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Volkswagen Polo 6? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three manifestations are the main symptoms of a leaking injector. As this troubles can bring about more significant engine complications on your car, we decided to prepare this article to help you validate the failure of a leaking injector and handle it properly. To do this, we will first check out the case of gasoline injectors and then at those of diesel injectors Volkswagen Polo 6.
Leaking injector on my petrol Volkswagen Polo 6
It is crucial to know that the injectors on petrol and diesel engines are different, in fact, 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 6: The different leaks
It should be known that injector leaks on a Volkswagen Polo 6 equipped with a petrol engine are pretty infrequent. This is because 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 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 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 Polo 6
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 Polo 6: The different leaks
In the case of leaking diesel injectors on your Volkswagen Polo 6, there are three different types 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 reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Volkswagen Polo 6 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should find an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we recommend you to read this article on the presence of oil leaking on your Volkswagen Polo 6.
Leaking injector on my Volkswagen Polo 6, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen prior to this, to a worn seal due to the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some precautions:
- 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 oftentimes be restricted to swapping 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 smallest hesitation in the treatment of your injector that leaks on your Volkswagen Polo 6, we recommend you to get closer to your repair shop to avoid any bad handling that could significantly harm the condition of your Volkswagen Polo 6.
To discover more tips on the Volkswagen Polo 6, take a look at the Volkswagen Polo 6 category.
