Whenever you are alert of abnormal symptoms on your car, you are right to be worried, because a car represents a huge annual budget and surprising malfunctions don’t lower the bill. So what if you feel as if you have a leaking injector on your Mazda 6? You almost certainly figured it out thanks to black/oily drips along your engine, or a troubled idle, or unusual black smoke. These three symptoms are the main signs of a leaking injector. As this troubles can lead to more severe engine trouble on your car, we chose to compose this article to help you ensure the failure of a leaking injector and treat it properly. To accomplish this, we will first of all look into the circumstance of gasoline injectors and then at those of diesel injectors Mazda 6.
Leaking injector on my petrol Mazda 6
It is fundamental to know that the injectors on petrol and diesel engines are different, in fact, the difference in combustion between these two kind 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 Mazda 6: The different leaks
It should be mentioned that injector leaks on a Mazda 6 equipped with a petrol engine are rather infrequent. This is caused by 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 component 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 part of the injector of your car, this one will occur from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mazda 6
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 Mazda 6: The different leaks
In the circumstance of leaking diesel injectors on your Mazda 6, there are three several kind of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform as time passes, generally 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 Mazda 6 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 find an air noise and a compression loss. - If after checking you have oil leaking but it does not come from your injectors, we encourage you to consult this article on the existence of oil leaking on your Mazda 6.
Leaking injector on my Mazda 6, how to fix the leak
And at last, we’re going to look into how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen sooner, to a worn seal due to the pressures endured. But think that the pressure in the circuit is gigantic, specifically 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 regularly be limited to changing the seals that have failed:
- Find the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the set up 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 smallest hesitation in the treatment of your injector that leaks on your Mazda 6, we encourage you to get closer to your motor mechanic to avoid any bad handling that could critically harm the condition of your Mazda 6.
If perhaps you have any further questions about the Mazda 6, do not hesitate to consult our Mazda 6 category.
