In the event that you are informed of irregular signs on your car, you are right to be concerned, because a car represents a big annual budget and unpredicted breakdowns don’t reduce the costs. So what if you think that you have a leaking injector on your Renault Megane 2? You probably figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or strange black smoke. These three signs of illness are the main indicators of a leaking injector. As this failure can end up in more critical engine trouble on your car, we chose to produce this content page to help you ensure the failure of a leaking injector and treat it correctly. To do so, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Renault Megane 2.
Leaking injector on my petrol Renault Megane 2
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 essential difference lies in the pressure undergone 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 Megane 2: The different leaks
It should be noted that injector leaks on a Renault Megane 2 equipped with a petrol engine are rather rare. This is caused by 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 conceivable 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:
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 Renault Megane 2
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system produces 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 Megane 2: The different leaks
In the circumstance of leaking diesel injectors on your Renault Megane 2, there are three several kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform over time, usually 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 Renault Megane 2 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 troublesome, 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 content page on the presence of oil leaking on your Renault Megane 2.
Leaking injector on my Renault Megane 2, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen sooner, to a worn seal because 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 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.
Regarding the repair part of your leak, it will oftentimes be restricted to replacing the seals that have failed:
- Situate 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not inevitably very hard, but if you have the smallest hesitation in the treatment of your injector that leaks on your Renault Megane 2, we recommend you to get closer to your auto technician to avoid any bad manipulation that could seriously harm the condition of your Renault Megane 2.
To find more tips on the Renault Megane 2, take a look at the Renault Megane 2 category.
