Whenever you are informed of irregular symptoms on your car, you are right to be intrigued, because a car represents a big annual budget and unpredicted breakdowns don’t lower the costs. So what if you feel like you have a leaking injector on your Audi Sq7? You almost certainly figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or abnormal black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can bring about more severe engine trouble on your car, we made a decision to publish this content to help you ensure the failure of a leaking injector and handle it correctly. To accomplish this, we will initially look at the circumstance of gasoline injectors and then at those of diesel injectors Audi Sq7.
Leaking injector on my petrol Audi Sq7
It is essential to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two kind of engines makes the injection distinct. The essential 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 Audi Sq7: The different leaks
It should be noted that injector leaks on a Audi Sq7 equipped with a petrol engine are rather infrequent. 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 plausible that you have a leak from the top of the injector, this is the part that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may suffer a leak coming from the lower part 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 Audi Sq7
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 Audi Sq7: The different leaks
In the circumstance of leaking diesel injectors on your Audi Sq7, there are three different kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform after a while, in most cases 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 Audi Sq7 will be caused by 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 encounter an air noise and a compression loss. - If after examining you have oil leaking but it does not come from your injectors, we recommend you to browse this content on the presence of oil leaking on your Audi Sq7.
Leaking injector on my Audi Sq7, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen sooner, 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 conducted…
- Covering you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Concerning the repair part of your leak, it will very often be limited to changing 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 cases, these interventions are not inevitably complex, but if you have the smallest hesitation in the treatment of your injector that leaks on your Audi Sq7, we recommend you to get closer to your auto technician to avoid any bad manipulation that could significantly harm the condition of your Audi Sq7.
If you have any additional questions about the Audi Sq7, do not hesitate to consult our Audi Sq7 category.
