In the event that you are alert of unusual symptoms on your car, you are right to be worried, because a car represents a huge annual budget and unexpected breakdowns don’t lower the bill. So what if you feel like you have a leaking injector on your Buick Cascada? You probably figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or uncommon black smoke. These three manifestations are the main indicators of a leaking injector. As this troubles can lead to more severe engine concerns on your car, we made a decision to publish this content page to help you confirm the failure of a leaking injector and treat it correctly. To do so, we will first of all look into the case of gasoline injectors and then at those of diesel injectors Buick Cascada.
Leaking injector on my petrol Buick Cascada
It is essential to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two kind 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 Buick Cascada: The different leaks
It should be noted that injector leaks on a Buick Cascada equipped with a petrol engine are pretty infrequent. This is caused by 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 plausible 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:
Finally, you may suffer a leak coming from the lower portion of the injector of your car, this one will appear from the junction with the engine and not with the rail as seen before.
Leaking injector on my diesel Buick Cascada
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 Buick Cascada: The different leaks
In the case of leaking diesel injectors on your Buick Cascada, there are three several kind of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform along with time, 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 Cascada 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 examining you have oil leaking but it does not come from your injectors, we advise you to read this content page on the presence of oil leaking on your Buick Cascada.
Leaking injector on my Buick Cascada, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Very often a leak is linked, as we have seen previously, to a worn seal as a result 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 done…
- Masking 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 very often be limited to replacing the seals that have failed:
- Locate the source of the leak
- Take apart 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 automatically complicated, but if you have the smallest hesitation in the treatment of your injector that leaks on your Buick Cascada, we advise you to get closer to your repair shop to avoid any bad manipulation that could severely harm the condition of your Buick Cascada.
If you wish more guides on the Buick Cascada, go to our Buick Cascada category.
