In the event you are aware of irregular symptoms on your vehicle, you are right to be concerned, because a car represents a big annual budget and surprising malfunctions don’t reduce the costs. So what if you find that you have a leaking injector on your Buick LaCrosse? You likely figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or unconventional black smoke. These three signs of illness are the main signals of a leaking injector. As this troubles can bring about more critical engine concerns on your car, we decided to compose this article content to help you verify the failure of a leaking injector and deal with it correctly. To achieve this, we will first look at the circumstance of gasoline injectors and then at those of diesel injectors Buick LaCrosse.
Leaking injector on my petrol Buick LaCrosse
It is vital to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two types of engines makes the injection distinct. The key 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 Buick LaCrosse: The different leaks
It should be noted that injector leaks on a Buick LaCrosse equipped with a petrol engine are pretty rare. This is caused by 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 possible that you have a leak from the top of the injector, this is the portion 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 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 Buick LaCrosse
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 Buick LaCrosse: The different leaks
In the circumstance of leaking diesel injectors on your Buick LaCrosse, there are three different types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform after a while, generally 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 Buick LaCrosse 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 bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we recommend you to read this article content on the existence of oil leaking on your Buick LaCrosse.
Leaking injector on my Buick LaCrosse, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen previously, to a worn seal due to the pressures suffered. 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 achieved…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Regarding the repair part of your leak, it will regularly be limited to swapping the seals that have failed:
- Find out the source of the leak
- Dismantle 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 cases, these interventions are not necessarily complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Buick LaCrosse, we recommend you to get closer to your mechanic to avoid any bad handling that could significantly harm the condition of your Buick LaCrosse.
To discover more tips on the Buick LaCrosse, take a look at the Buick LaCrosse category.
