If you are alert of abnormal signs on your car, you are right to be worried, because a car represents a big annual budget and unexpected breakdowns don’t reduce the expenses. So what if you feel as if you have a leaking injector on your Chevrolet City Express? You most likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three symptoms are the main symptoms of a leaking injector. As this failure can cause more significant engine complications on your car, we chose to publish this content to help you ensure the failure of a leaking injector and treat it properly. To accomplish this, we will first look at the case of gasoline injectors and then at those of diesel injectors Chevrolet City Express.


Leaking injector on my petrol Chevrolet City Express

It is vital to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types of engines makes the injection different. The biggest 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 City Express: The different leaks

It should be noted that injector leaks on a Chevrolet City Express equipped with a petrol engine are pretty rare. This is caused by the much lower pressure in the petrol intake systems. Nevertheless, 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 portion 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 part 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 Chevrolet City Express

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 City Express: The different leaks

In the case of leaking diesel injectors on your Chevrolet City Express, 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 Chevrolet City Express 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 bothersome, 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 verifying you have oil leaking but it does not come from your injectors, we recommend you to read this content on the existence of oil leaking on your Chevrolet City Express.

Leaking injector on my Chevrolet City Express, 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 because of the pressures endured. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some 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.

Concerning 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 inevitably complicated, but if you have the tiniest uncertainty in the treatment of your injector that leaks on your Chevrolet City Express, we recommend you to get closer to your auto technician to avoid any bad handling that could critically harm the condition of your Chevrolet City Express.

If you have any further questions about the Chevrolet City Express, do not hesitate to consult our Chevrolet City Express category.