If you are alert of abnormal symptoms on your automobile, you are right to be worried, because a car represents a big annual budget and surprising malfunctions don’t reduce the expenses. So what if you sense that you have a leaking injector on your Renault Espace 4? You likely figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three manifestations are the main signals of a leaking injector. As this troubles can cause more serious engine trouble on your car, we chose to publish this content to help you confirm the failure of a leaking injector and treat it properly. To achieve this, we will initially look at the case of gasoline injectors and then at those of diesel injectors Renault Espace 4.
Leaking injector on my petrol Renault Espace 4
It is important to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two kind of engines makes the injection distinct. The key 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 Espace 4: The different leaks
It should be mentioned that injector leaks on a Renault Espace 4 equipped with a petrol engine are rather rare. This is caused by the much lower pressure in the petrol intake systems. However, there are two kind 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 part 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 part 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 Espace 4
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Espace 4: The different leaks
In the case of leaking diesel injectors on your Renault Espace 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 in the long run, generally 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 Espace 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 feel an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we encourage you to browse this content on the existence of oil leaking on your Renault Espace 4.
Leaking injector on my Renault Espace 4, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Very often a leak is connected, as we have seen sooner, to a worn seal as a result of the pressures endured. 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 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 regularly be restricted to changing the seals that have failed:
- Find 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 cases, these interventions are not automatically complicated, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Renault Espace 4, we encourage you to get closer to your repair shop to avoid any bad handling that could seriously harm the condition of your Renault Espace 4.
To find more tips on the Renault Espace 4, take a look at the Renault Espace 4 category.
