Whenever you are aware of unusual signs on your automobile, you are right to be concerned, because a car represents a big annual budget and unexpected malfunctions don’t reduce the expenses. So what if you feel as if you have a leaking injector on your GMC Acadia? You probably figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three symptoms are the main indicators of a leaking injector. As this problem can bring about more critical engine concerns on your car, we thought we would publish this content page to help you confirm the failure of a leaking injector and deal with it properly. To do this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors GMC Acadia.
Leaking injector on my petrol GMC Acadia
It is fundamental to know that the injectors on petrol and diesel engines are distinct, actually, the difference in combustion between these two types of engines makes the injection distinct. The main 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 GMC Acadia: The different leaks
It should be noted that injector leaks on a GMC Acadia equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. However, 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 component that is connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may suffer 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 GMC Acadia
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 GMC Acadia: The different leaks
In the case of leaking diesel injectors on your GMC Acadia, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform along with time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your GMC Acadia 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 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 advise you to browse this content page on the presence of oil leaking on your GMC Acadia.
Leaking injector on my GMC Acadia, how to fix the leak
And to finish, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen prior to this, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is conducted…
- 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 regularly be restricted to swapping the seals that have failed:
- Locate 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not automatically complicated, but if you have the smallest hesitation in the treatment of your injector that leaks on your GMC Acadia, we advise you to get closer to your auto technician to avoid any bad manipulation that could significantly harm the condition of your GMC Acadia.
To discover more tips on the GMC Acadia, take a look at the GMC Acadia category.
