Whenever you are aware of irregular symptoms on your automobile, you are right to be intrigued, because a car represents a huge annual budget and unpredicted malfunctions don’t lower the costs. So what if you find that you have a leaking injector on your Chevrolet Express? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three signs of illness are the main symptoms of a leaking injector. As this failure can bring about more severe engine concerns on your car, we thought we would compose this content to help you confirm the failure of a leaking injector and handle it correctly. To do so, we will initially check out the circumstance of gasoline injectors and then at those of diesel injectors Chevrolet Express.
Leaking injector on my petrol Chevrolet Express
It is fundamental to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two types of engines makes the injection distinct. 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 Chevrolet Express: The different leaks
It should be known that injector leaks on a Chevrolet Express 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 plausible that you have a leak from the top of the injector, this is the part 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 Chevrolet Express
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 Chevrolet Express: The different leaks
In the circumstance of leaking diesel injectors on your Chevrolet Express, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, 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 implies, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Chevrolet Express 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 checking you have oil leaking but it does not come from your injectors, we recommend you to read this content on the presence of oil leaking on your Chevrolet Express.
Leaking injector on my Chevrolet Express, how to fix the leak
And to finish, we’re going to check out how to fix a leaking injector on your car. Oftentimes a leak is associated, as we have seen prior to this, to a worn seal because of the pressures suffered. But think that the pressure in the circuit is tremendous, especially on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is completed…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Regarding the repair part of your leak, it will oftentimes be restricted to changing the seals that have failed:
- Identify 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 cases, these interventions are not automatically very hard, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Chevrolet Express, we recommend you to get closer to your repair shop to avoid any bad manipulation that could severely harm the condition of your Chevrolet Express.
In the event that you have any further questions about the Chevrolet Express, do not hesitate to consult our Chevrolet Express category.
