In the event you are informed of abnormal symptoms on your car, you are right to be worried, because a car represents a huge annual budget and unexpected malfunctions don’t reduce the costs. So what if you sense that you have a leaking injector on your Renault Laguna? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three signs of illness are the main signs of a leaking injector. As this troubles can end up in more serious engine problems on your car, we chose to produce this content to help you ensure the failure of a leaking injector and handle it properly. To do this, we will first of all look into the circumstance of gasoline injectors and then at those of diesel injectors Renault Laguna.
Leaking injector on my petrol Renault Laguna
It is essential to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two sort of engines makes the injection different. The main 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 Laguna: The different leaks
It should be mentioned that injector leaks on a Renault Laguna equipped with a petrol engine are pretty infrequent. This is caused by 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 plausible 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 portion 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 Laguna
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 Laguna: The different leaks
In the circumstance of leaking diesel injectors on your Renault Laguna, there are three several sort of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Renault Laguna 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 troublesome, 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 checking you have oil leaking but it does not come from your injectors, we suggest you to browse this content on the presence of oil leaking on your Renault Laguna.
Leaking injector on my Renault Laguna, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is linked, 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 enormous, 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.
Concerning the repair part of your leak, it will oftentimes be restricted to swapping the seals that have failed:
- Situate the source of the leak
- Dismantle the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all cases, these interventions are not necessarily complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Renault Laguna, we suggest you to get closer to your auto mechanic to avoid any bad handling that could seriously harm the condition of your Renault Laguna.
If you need more guides on the Renault Laguna, go to our Renault Laguna category.
