In the event you are informed of unusual signs on your car, you are right to be worried, because a car represents a huge annual budget and sudden breakdowns don’t lower the expenses. So what if you find that you have a leaking injector on your Chevrolet Cobalt? You most likely figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three signs of illness are the main indicators of a leaking injector. As this problem can bring about more severe engine concerns on your car, we decided to write this article to help you confirm the failure of a leaking injector and treat it properly. To do so, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Chevrolet Cobalt.
Leaking injector on my petrol Chevrolet Cobalt
It is important to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two types of engines makes the injection distinct. The essential 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 Cobalt: The different leaks
It should be known that injector leaks on a Chevrolet Cobalt equipped with a petrol engine are rather rare. This is because of the much lower pressure in the petrol intake systems. Even so, there are two types 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 component 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 occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Chevrolet Cobalt
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 Cobalt: The different leaks
In the circumstance of leaking diesel injectors on your Chevrolet Cobalt, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform with time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Chevrolet Cobalt 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 recommend you to consult this article on the existence of oil leaking on your Chevrolet Cobalt.
Leaking injector on my Chevrolet Cobalt, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen sooner, to a worn seal because of the pressures endured. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is carried out…
- 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 frequently be limited to changing the seals that have failed:
- Find out 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 tiniest uncertainty in the treatment of your injector that leaks on your Chevrolet Cobalt, we recommend you to get closer to your mechanic to avoid any bad manipulation that could severely harm the condition of your Chevrolet Cobalt.
In the event that you have any further questions about the Chevrolet Cobalt, do not hesitate to consult our Chevrolet Cobalt category.
