If you are informed of irregular symptoms on your automobile, you are right to be intrigued, because a car represents a massive annual budget and unforeseen malfunctions don’t lower the expenses. So what if you feel like you have a leaking injector on your Cadillac DTS? You probably figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or strange black smoke. These three manifestations are the main signs of a leaking injector. As this troubles can cause more significant engine problems on your car, we made a decision to compose this article content to help you ensure the failure of a leaking injector and treat it correctly. To achieve this, we will first check out the case of gasoline injectors and then at those of diesel injectors Cadillac DTS.
Leaking injector on my petrol Cadillac DTS
It is essential to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two kind of engines makes the injection distinct. 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 Cadillac DTS: The different leaks
It should be said that injector leaks on a Cadillac DTS equipped with a petrol engine are pretty rare. This is caused by the much lower pressure in the petrol intake systems. Even so, 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 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 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 Cadillac DTS
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure creates 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 Cadillac DTS: The different leaks
In the case of leaking diesel injectors on your Cadillac DTS, there are three several kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform over time, usually 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 Cadillac DTS 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 experience an air noise and a compression loss. - If after verifying 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 Cadillac DTS.
Leaking injector on my Cadillac DTS, how to fix the leak
And at last, we’re going to check out how to fix a leaking injector on your car. Very often a leak is associated, as we have seen previously, to a worn seal as a result 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 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 regularly be limited to swapping the seals that have failed:
- Situate 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 respect with the manufacturer’s standards.
In all situations, these interventions are not necessarily very hard, but if you have the tiniest doubt in the treatment of your injector that leaks on your Cadillac DTS, we suggest you to get closer to your motor mechanic to avoid any bad handling that could severely harm the condition of your Cadillac DTS.
If you want more guides on the Cadillac DTS, go to our Cadillac DTS category.
