In the event that you are alert of irregular symptoms on your automobile, you are right to be preoccupied, because a car represents a big annual budget and unpredicted malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Renault Megane? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three symptoms are the main symptoms of a leaking injector. As this troubles can bring on more severe engine problems on your car, we decided to produce this content page to help you ensure the failure of a leaking injector and handle it correctly. To achieve this, we will first check out the case of gasoline injectors and then at those of diesel injectors Renault Megane.
Leaking injector on my petrol Renault Megane
It is vital to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two kind of engines makes the injection distinct. The biggest 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 Megane: The different leaks
It should be mentioned that injector leaks on a Renault Megane equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. However, 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 portion 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 experience 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
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: The different leaks
In the case of leaking diesel injectors on your Renault Megane, there are three different kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform in the long run, usually 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 Megane 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 annoying, 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 checking you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the existence of oil leaking on your Renault Megane.
Leaking injector on my Renault Megane, 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 associated, as we have seen previously, to a worn seal because of the pressures suffered. 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 done…
- 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 very often be limited to replacing the seals that have failed:
- Identify 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 automatically difficult, but if you have the smallest doubt in the treatment of your injector that leaks on your Renault Megane, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Renault Megane.
To discover more tips on the Renault Megane, take a look at the Renault Megane category.
