If you are alert of abnormal symptoms on your vehicle, you are right to be worried, because a car represents a massive annual budget and unexpected malfunctions don’t lower the costs. So what if you sense that you have a leaking injector on your Chevrolet Avalanche? You probably figured it out thanks to black/oily drips along your engine, or a troubled idle, or abnormal black smoke. These three symptoms are the main indicators of a leaking injector. As this problem can end up in more critical engine trouble on your car, we thought we would write this content page to help you validate the failure of a leaking injector and handle it properly. To achieve this, we will first look into the circumstance of gasoline injectors and then at those of diesel injectors Chevrolet Avalanche.
Leaking injector on my petrol Chevrolet Avalanche
It is essential to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two sort of engines makes the injection different. The essential 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 Avalanche: The different leaks
It should be noted that injector leaks on a Chevrolet Avalanche equipped with a petrol engine are rather infrequent. This is due to the much lower pressure in the petrol intake systems. However, 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 part that is connected 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 previously.
Leaking injector on my diesel Chevrolet Avalanche
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 Chevrolet Avalanche: The different leaks
In the circumstance of leaking diesel injectors on your Chevrolet Avalanche, there are three different sort of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with time, usually the leak will be at the clamping point. - Injector return leakage:
As its name reveals, this leakage concerns the management of the fuel return in the injector, this time the injector that leaks on your Chevrolet Avalanche 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 annoying, 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 verifying you have oil leaking but it does not come from your injectors, we encourage you to consult this content page on the presence of oil leaking on your Chevrolet Avalanche.
Leaking injector on my Chevrolet Avalanche, how to fix the leak
And to finish, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is connected, as we have seen previously, to a worn seal because of the pressures endured. But think that the pressure in the circuit is enormous, specifically on diesel engines. So you will have to take some safety measures:
- Lower the pressure before any work is conducted…
- 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 limited to swapping the seals that have failed:
- Find out the source of the leak
- Dismantle the injector in question
- Replace 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 necessarily very hard, but if you have the smallest hesitation in the treatment of your injector that leaks on your Chevrolet Avalanche, we encourage you to get closer to your auto technician to avoid any bad manipulation that could seriously harm the condition of your Chevrolet Avalanche.
If perhaps you have any further questions about the Chevrolet Avalanche, do not hesitate to consult our Chevrolet Avalanche category.
