Whenever you are aware of irregular symptoms on your car, you are right to be concerned, because a car represents a huge annual budget and surprising breakdowns don’t lower the costs. So what if you find that you have a leaking injector on your Renault Kadjar? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or uncommon black smoke. These three signs of illness are the main signals of a leaking injector. As this problem can end up in more severe engine complications on your car, we thought we would compose this content to help you validate the failure of a leaking injector and handle it properly. To do so, we will initially take a look at the circumstance of gasoline injectors and then at those of diesel injectors Renault Kadjar.
Leaking injector on my petrol Renault Kadjar
It is important to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two types of engines makes the injection different. The essential 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 Kadjar: The different leaks
It should be known that injector leaks on a Renault Kadjar equipped with a petrol engine are rather infrequent. This is caused by 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:
At last, you may suffer a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Renault Kadjar
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 Kadjar: The different leaks
In the circumstance of leaking diesel injectors on your Renault Kadjar, there are three several types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform as time passes, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name implies, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Renault Kadjar will be the result 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 experience an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we encourage you to read this content on the existence of oil leaking on your Renault Kadjar.
Leaking injector on my Renault Kadjar, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen prior to this, 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 measures:
- Lower the pressure before any work is completed…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will very often be limited to changing the seals that have failed:
- Find 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 situations, these interventions are not necessarily complex, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Renault Kadjar, we encourage you to get closer to your motor mechanic to avoid any bad manipulation that could significantly harm the condition of your Renault Kadjar.
Whenever you have any additional questions about the Renault Kadjar, do not hesitate to consult our Renault Kadjar category.
