In the event that you are alert of abnormal signs on your car, you are right to be intrigued, because a car represents a big annual budget and surprising breakdowns don’t reduce the bill. So what if you feel like you have a leaking injector on your Cadillac Escalade? You most likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unusual black smoke. These three manifestations are the main signs of a leaking injector. As this troubles can end up in more significant engine trouble on your car, we thought we would prepare this article to help you verify the failure of a leaking injector and deal with it correctly. To do so, we will first take a look at the case of gasoline injectors and then at those of diesel injectors Cadillac Escalade.
Leaking injector on my petrol Cadillac Escalade
It is fundamental to know that the injectors on petrol and diesel engines are different, actually, the difference in combustion between these two types of engines makes the injection different. The biggest difference lies in the pressure experienced 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 Escalade: The different leaks
It should be mentioned that injector leaks on a Cadillac Escalade equipped with a petrol engine are rather infrequent. This is due to the much lower pressure in the petrol intake systems. Even so, there are two types 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 linked to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may encounter a leak coming from the lower portion of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Cadillac Escalade
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 Cadillac Escalade: The different leaks
In the case of leaking diesel injectors on your Cadillac Escalade, there are three different types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Cadillac Escalade 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 troublesome, 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 advise you to consult this article on the existence of oil leaking on your Cadillac Escalade.
Leaking injector on my Cadillac Escalade, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Oftentimes a leak is connected, as we have seen previously, to a worn seal caused by the pressures suffered. But think that the pressure in the circuit is tremendous, especially 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.
Regarding the repair part of your leak, it will very often be limited to swapping the seals that have failed:
- Locate the source of the leak
- Dismantle the injector in question
- Change the corresponding seal kit
- Reassemble the set up and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all cases, these interventions are not inevitably complicated, but if you have the smallest hesitation in the treatment of your injector that leaks on your Cadillac Escalade, we advise you to get closer to your auto mechanic to avoid any bad manipulation that could critically harm the condition of your Cadillac Escalade.
To find more tips on the Cadillac Escalade, take a look at the Cadillac Escalade category.
