In cases where you are informed of unusual symptoms on your vehicle, you are right to be concerned, because a car represents a big annual budget and sudden breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Buick Lucerne? You most likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three signs of illness are the main indicators of a leaking injector. As this troubles can produce more serious engine concerns on your car, we decided to prepare this article content to help you ensure the failure of a leaking injector and handle it correctly. To accomplish this, we will first look into the case of gasoline injectors and then at those of diesel injectors Buick Lucerne.
Leaking injector on my petrol Buick Lucerne
It is essential 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 biggest 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 Lucerne: The different leaks
It should be mentioned that injector leaks on a Buick Lucerne equipped with a petrol engine are rather rare. This is resulting from the much lower pressure in the petrol intake systems. Nevertheless, 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 portion that is linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may encounter a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Buick Lucerne
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 Buick Lucerne: The different leaks
In the case of leaking diesel injectors on your Buick Lucerne, there are three several kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform in the long run, generally the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Buick Lucerne 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 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 suggest you to read this article content on the existence of oil leaking on your Buick Lucerne.
Leaking injector on my Buick Lucerne, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Regularly a leak is connected, as we have seen sooner, to a worn seal because of the pressures suffered. 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 carried out…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will frequently be limited to replacing the seals that have failed:
- Discover the source of the leak
- Dismantle 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 situations, these interventions are not inevitably difficult, but if you have the smallest hesitation in the treatment of your injector that leaks on your Buick Lucerne, we suggest you to get closer to your auto mechanic to avoid any bad manipulation that could seriously harm the condition of your Buick Lucerne.
To find more tips on the Buick Lucerne, take a look at the Buick Lucerne category.
