If you are aware of abnormal symptoms on your automobile, you are right to be preoccupied, because a car represents a massive annual budget and surprising malfunctions don’t reduce the expenses. So what if you sense that you have a leaking injector on your Renault Modus? You likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unconventional black smoke. These three symptoms are the main symptoms of a leaking injector. As this problem can produce more critical engine problems on your car, we chose to produce this content page to help you verify the failure of a leaking injector and handle it correctly. To achieve this, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Renault Modus.
Leaking injector on my petrol Renault Modus
It is fundamental to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types of engines makes the injection different. 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 Modus: The different leaks
It should be mentioned that injector leaks on a Renault Modus equipped with a petrol engine are rather rare. This is because of the much lower pressure in the petrol intake systems. However, there are two types 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 attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, 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 previously.
Leaking injector on my diesel Renault Modus
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system generates 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 Modus: The different leaks
In the case of leaking diesel injectors on your Renault Modus, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with time, generally the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Renault Modus 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 bothersome, 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 examining 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 Modus.
Leaking injector on my Renault Modus, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is achieved…
- 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 frequently be restricted to changing the seals that have failed:
- Discover 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 respect with the manufacturer’s standards.
In all situations, these interventions are not inevitably complicated, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Renault Modus, we recommend you to get closer to your auto technician to avoid any bad manipulation that could critically harm the condition of your Renault Modus.
Whenever you have any additional questions about the Renault Modus, do not hesitate to consult our Renault Modus category.
