In the event you are alert of unusual symptoms on your vehicle, you are right to be intrigued, because a car represents a huge annual budget and surprising breakdowns don’t lower the expenses. So what if you sense that you have a leaking injector on your Renault Megane 3? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or abnormal black smoke. These three signs of illness are the main symptoms of a leaking injector. As this problem can cause more significant engine complications on your car, we made a decision to produce this content page to help you ensure the failure of a leaking injector and treat it properly. To accomplish this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Renault Megane 3.
Leaking injector on my petrol Renault Megane 3
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 sort of engines makes the injection different. The biggest 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 3: The different leaks
It should be noted that injector leaks on a Renault Megane 3 equipped with a petrol engine are pretty rare. 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 portion 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 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 Renault Megane 3
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 3: The different leaks
In the case of leaking diesel injectors on your Renault Megane 3, there are three different sort 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 implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Renault Megane 3 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 find 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 browse this content page on the presence of oil leaking on your Renault Megane 3.
Leaking injector on my Renault Megane 3, how to fix the leak
And at last, we’re going to check out 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 endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some measures:
- 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.
Relating to the repair part of your leak, it will regularly be restricted to replacing the seals that have failed:
- Find the source of the leak
- Dismantle 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 specifically very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Renault Megane 3, we advise you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Renault Megane 3.
If perhaps you have any additional questions about the Renault Megane 3, do not hesitate to consult our Renault Megane 3 category.
