If you are alert of abnormal signs on your vehicle, you are right to be intrigued, because a car represents a huge annual budget and unexpected malfunctions don’t reduce the bill. So what if you feel as if you have a leaking injector on your Jeep Cherokee? You probably figured it out thanks to black/oily drips along your engine motor, or a troubled idle, or strange black smoke. These three symptoms are the main symptoms of a leaking injector. As this problem can cause more critical engine concerns on your car, we decided to write this content page to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Jeep Cherokee.


Leaking injector on my petrol Jeep Cherokee

It is vital to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two kind 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 Jeep Cherokee: The different leaks

It should be mentioned that injector leaks on a Jeep Cherokee equipped with a petrol engine are pretty rare. This is as a result of the much lower pressure in the petrol intake systems. However, there are two kind 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 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 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 before.

Leaking injector on my diesel Jeep Cherokee

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

In the case of leaking diesel injectors on your Jeep Cherokee, there are three several kind of leaks:

  • Leakage from the injector inlet:
    In cases like this, it is an inlet pipe that will deform along with time, commonly 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 Jeep Cherokee will be caused 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 experience an air noise and a compression loss.
  • If after examining you have oil leaking but it does not come from your injectors, we recommend you to consult this content page on the existence of oil leaking on your Jeep Cherokee.

Leaking injector on my Jeep Cherokee, 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 associated, as we have seen previously, to a worn seal because of 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 completed…
  • 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 oftentimes be restricted to replacing the seals that have failed:

  • Find out the source of the leak
  • Take apart the injector in question
  • Replace the corresponding seal kit
  • Reassemble the assembly and tighten with a torque wrench in accordance with the manufacturer’s standards.

In all cases, these interventions are not inevitably complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Jeep Cherokee, we recommend you to get closer to your auto mechanic to avoid any bad handling that could critically harm the condition of your Jeep Cherokee.

Whenever you have any further questions about the Jeep Cherokee, do not hesitate to consult our Jeep Cherokee category.