If you are aware of unusual symptoms on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unpredicted malfunctions don’t reduce the expenses. So what if you sense that you have a leaking injector on your GMC Terrain? You likely figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or unconventional black smoke. These three manifestations are the main indicators of a leaking injector. As this problem can bring on more significant engine concerns on your car, we decided to produce this article content to help you ensure the failure of a leaking injector and handle it correctly. To achieve this, we will first of all check out the circumstance of gasoline injectors and then at those of diesel injectors GMC Terrain.
Leaking injector on my petrol GMC Terrain
It is fundamental to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two kind of engines makes the injection different. The key 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 GMC Terrain: The different leaks
It should be mentioned that injector leaks on a GMC Terrain equipped with a petrol engine are rather infrequent. This is resulting from 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 conceivable 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 suffer 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 GMC Terrain
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 GMC Terrain: The different leaks
In the circumstance of leaking diesel injectors on your GMC Terrain, there are three different 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 reveals, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your GMC Terrain 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 find an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we suggest you to read this article content on the existence of oil leaking on your GMC Terrain.
Leaking injector on my GMC Terrain, how to fix the leak
And finally, we’re going to check out how to fix a leaking injector on your car. Frequently a leak is associated, 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 tremendous, specifically on diesel engines. So you will have to take some precautions:
- Lower the pressure before any work is carried out…
- 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 regularly be limited to replacing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not necessarily complex, but if you have the smallest uncertainty in the treatment of your injector that leaks on your GMC Terrain, we suggest you to get closer to your mechanic to avoid any bad handling that could severely harm the condition of your GMC Terrain.
If you want more tutorials on the GMC Terrain, go to our GMC Terrain category.
