Whenever you are informed of abnormal signs on your automobile, you are right to be concerned, because a car represents a big annual budget and surprising malfunctions don’t lower the costs. So what if you find that you have a leaking injector on your Renault Megane 4? You likely figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or unconventional black smoke. These three manifestations are the main signs of a leaking injector. As this troubles can cause more significant engine concerns on your car, we decided to compose this article content to help you validate the failure of a leaking injector and treat it properly. To do this, we will first check out the case of gasoline injectors and then at those of diesel injectors Renault Megane 4.
Leaking injector on my petrol Renault Megane 4
It is fundamental to know that the injectors on petrol and diesel engines are different, the reality is, the difference in combustion between these two kind of engines makes the injection different. The essential 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 4: The different leaks
It should be said that injector leaks on a Renault Megane 4 equipped with a petrol engine are pretty rare. 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 conceivable that you have a leak from the top of the injector, this is the component 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 suffer 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 sooner.
Leaking injector on my diesel Renault Megane 4
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 4: The different leaks
In the case of leaking diesel injectors on your Renault Megane 4, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform along with time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Renault Megane 4 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 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to read this article content on the presence of oil leaking on your Renault Megane 4.
Leaking injector on my Renault Megane 4, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is connected, as we have seen prior to this, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some measures:
- 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 oftentimes be restricted to replacing the seals that have failed:
- Find out 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not automatically complex, but if you have the smallest hesitation in the treatment of your injector that leaks on your Renault Megane 4, we encourage you to get closer to your auto mechanic to avoid any bad manipulation that could severely harm the condition of your Renault Megane 4.
To discover more tips on the Renault Megane 4, take a look at the Renault Megane 4 category.
