Whenever you are alert of unusual symptoms on your vehicle, you are right to be concerned, because a car represents a massive annual budget and surprising breakdowns don’t reduce the costs. So what if you find that you have a leaking injector on your Chevrolet Impala? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three symptoms are the main signs of a leaking injector. As this failure can produce more critical engine complications on your car, we thought we would write this content to help you verify the failure of a leaking injector and deal with it correctly. To do this, we will first of all look at the circumstance of gasoline injectors and then at those of diesel injectors Chevrolet Impala.
Leaking injector on my petrol Chevrolet Impala
It is vital to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two kind of engines makes the injection distinct. 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 Chevrolet Impala: The different leaks
It should be noted that injector leaks on a Chevrolet Impala equipped with a petrol engine are pretty rare. This is caused by the much lower pressure in the petrol intake systems. Even so, 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 linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may encounter 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 Chevrolet Impala
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system produces 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 Chevrolet Impala: The different leaks
In the circumstance of leaking diesel injectors on your Chevrolet Impala, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, usually the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Chevrolet Impala 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 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 consult this content on the presence of oil leaking on your Chevrolet Impala.
Leaking injector on my Chevrolet Impala, how to fix the leak
And finally, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen previously, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- Covering 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 restricted to swapping the seals that have failed:
- Locate 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 situations, these interventions are not necessarily complex, but if you have the slightest uncertainty in the treatment of your injector that leaks on your Chevrolet Impala, we suggest you to get closer to your motor mechanic to avoid any bad handling that could significantly harm the condition of your Chevrolet Impala.
If you wish more guides on the Chevrolet Impala, go to our Chevrolet Impala category.
