Whenever you are alert of abnormal signs on your automobile, you are right to be worried, because a car represents a huge annual budget and unexpected malfunctions don’t lower the bill. So what if you sense that you have a leaking injector on your Renault Trafic? You likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or strange black smoke. These three symptoms are the main signs of a leaking injector. As this failure can end up in more severe engine concerns on your car, we decided to compose this article to help you confirm the failure of a leaking injector and deal with it correctly. To achieve this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Renault Trafic.
Leaking injector on my petrol Renault Trafic
It is essential to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two kind of engines makes the injection different. The key 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 Renault Trafic: The different leaks
It should be said that injector leaks on a Renault Trafic equipped with a petrol engine are pretty infrequent. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, 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 component that is attached 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 portion 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 Renault Trafic
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 Renault Trafic: The different leaks
In the circumstance of leaking diesel injectors on your Renault Trafic, there are three different kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform after a while, commonly the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Renault Trafic 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 troublesome, 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 browse this article on the presence of oil leaking on your Renault Trafic.
Leaking injector on my Renault Trafic, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Very often a leak is connected, as we have seen sooner, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is enormous, specifically 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.
Relating to the repair part of your leak, it will regularly be limited to replacing the seals that have failed:
- Discover the source of the leak
- Dismantle the injector in question
- Replace 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 difficult, but if you have the slightest hesitation in the treatment of your injector that leaks on your Renault Trafic, we recommend you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Renault Trafic.
If you wish more guides on the Renault Trafic, go to our Renault Trafic category.
