In cases where you are informed of unusual signs on your car, you are right to be worried, because a car represents a big annual budget and sudden breakdowns don’t lower the costs. So what if you feel like you have a leaking injector on your Renault Laguna 3? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or strange black smoke. These three signs of illness are the main signs of a leaking injector. As this failure can cause more critical engine trouble on your car, we made a decision to prepare this article content to help you ensure the failure of a leaking injector and treat it correctly. To do this, we will first look into the case of gasoline injectors and then at those of diesel injectors Renault Laguna 3.
Leaking injector on my petrol Renault Laguna 3
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 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 Laguna 3: The different leaks
It should be said that injector leaks on a Renault Laguna 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 attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may encounter 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 Laguna 3
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 Laguna 3: The different leaks
In the case of leaking diesel injectors on your Renault Laguna 3, there are three different sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Renault Laguna 3 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 encounter 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 browse this article content on the presence of oil leaking on your Renault Laguna 3.
Leaking injector on my Renault Laguna 3, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is connected, as we have seen prior to this, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is gigantic, especially 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.
Regarding the repair part of your leak, it will very often be limited to swapping the seals that have failed:
- Locate the source of the leak
- Take apart the injector in question
- Replace 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 specifically complicated, but if you have the tiniest doubt in the treatment of your injector that leaks on your Renault Laguna 3, we recommend you to get closer to your auto technician to avoid any bad handling that could critically harm the condition of your Renault Laguna 3.
Whenever you have any further questions about the Renault Laguna 3, do not hesitate to consult our Renault Laguna 3 category.
