If you are informed of irregular signs on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unexpected malfunctions don’t lower the costs. So what if you think that you have a leaking injector on your Mazda 3? You most likely figured it out thanks to black/oily drips along your engine, or a disturbed idle, or strange black smoke. These three signs of illness are the main indicators of a leaking injector. As this troubles can bring on more critical engine problems on your car, we chose to prepare this article to help you verify the failure of a leaking injector and handle it properly. To achieve this, we will initially check out the case of gasoline injectors and then at those of diesel injectors Mazda 3.
Leaking injector on my petrol Mazda 3
It is fundamental to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two types of engines makes the injection different. 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 Mazda 3: The different leaks
It should be known that injector leaks on a Mazda 3 equipped with a petrol engine are pretty rare. 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 component that is attached to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
Finally, you may experience 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 before.
Leaking injector on my diesel Mazda 3
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure 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 3: The different leaks
In the case of leaking diesel injectors on your Mazda 3, there are three several types of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform along with time, commonly 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 Mazda 3 will be brought on by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, 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 checking you have oil leaking but it does not come from your injectors, we advise you to consult this article on the presence of oil leaking on your Mazda 3.
Leaking injector on my Mazda 3, how to fix the leak
And to finish, 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 sooner, to a worn seal because of the pressures endured. But think that the pressure in the circuit is tremendous, specifically on diesel engines. So you will have to take some measures:
- 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.
Concerning the repair part of your leak, it will oftentimes be restricted to replacing the seals that have failed:
- Locate 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 automatically complex, but if you have the tiniest hesitation in the treatment of your injector that leaks on your Mazda 3, we advise you to get closer to your auto mechanic to avoid any bad handling that could seriously harm the condition of your Mazda 3.
If you want more tutorials on the Mazda 3, go to our Mazda 3 category.
