In the event you are aware of irregular symptoms on your vehicle, you are right to be intrigued, because a car represents a massive annual budget and unforeseen breakdowns don’t reduce the bill. So what if you feel like you have a leaking injector on your Cadillac CTS? You likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can lead to more severe engine trouble on your car, we thought we would produce this article to help you verify the failure of a leaking injector and handle it properly. To do this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Cadillac CTS.


Leaking injector on my petrol Cadillac CTS

It is essential to know that the injectors on petrol and diesel engines are distinct, the truth is, the difference in combustion between these two sort of engines makes the injection distinct. The main 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 Cadillac CTS: The different leaks

It should be mentioned that injector leaks on a Cadillac CTS equipped with a petrol engine are pretty infrequent. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, there are two sort 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 component that is attached to the fuel rail, an O-ring will be involved in this.
  • Leak injector of the lower part:
    Finally, you may experience 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 before.

Leaking injector on my diesel Cadillac CTS

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 Cadillac CTS: The different leaks

In the case of leaking diesel injectors on your Cadillac CTS, there are three several sort of leaks:

  • Leakage from the injector inlet:
    In this instance, it is an inlet pipe that will deform as time passes, generally the leak will be at the clamping point.
  • Injector return leakage:
    As its name indicates, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Cadillac CTS will be a consequence 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 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 browse this article on the existence of oil leaking on your Cadillac CTS.

Leaking injector on my Cadillac CTS, how to fix the leak

And at last, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is linked, as we have seen prior to this, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some precautions:

  • Lower the pressure before any work is achieved…
  • 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 oftentimes be limited to replacing the seals that have failed:

  • Find out the source of the leak
  • Dismantle 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 cases, these interventions are not necessarily complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Cadillac CTS, we encourage you to get closer to your auto mechanic to avoid any bad manipulation that could critically harm the condition of your Cadillac CTS.

If you want more tutorials on the Cadillac CTS, go to our Cadillac CTS category.