In the event you are informed of unusual symptoms on your vehicle, you are right to be worried, because a car represents a big annual budget and unexpected breakdowns don’t lower the costs. So what if you think that you have a leaking injector on your Renault Grand Modus? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main signs of a leaking injector. As this problem can produce more critical engine problems on your car, we chose to write this content page to help you validate the failure of a leaking injector and handle it correctly. To accomplish this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Renault Grand Modus.
Leaking injector on my petrol Renault Grand Modus
It is vital 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 main 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 Grand Modus: The different leaks
It should be noted that injector leaks on a Renault Grand Modus equipped with a petrol engine are pretty rare. This is because of the much lower pressure in the petrol intake systems. However, 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 component 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 part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Renault Grand Modus
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 Grand Modus: The different leaks
In the case of leaking diesel injectors on your Renault Grand Modus, there are three several sort of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform with time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Renault Grand 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 annoying, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we suggest you to browse this content page on the presence of oil leaking on your Renault Grand Modus.
Leaking injector on my Renault Grand Modus, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is conducted…
- Covering 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
- Take apart 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 cases, these interventions are not automatically complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Renault Grand Modus, we suggest you to get closer to your motor mechanic to avoid any bad manipulation that could critically harm the condition of your Renault Grand Modus.
If perhaps you have any further questions about the Renault Grand Modus, do not hesitate to consult our Renault Grand Modus category.
