In the event that you are alert of abnormal signs on your car, you are right to be concerned, because a car represents a big annual budget and surprising malfunctions don’t reduce the costs. So what if you feel as if you have a leaking injector on your Mazda CX 3? You probably figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or abnormal black smoke. These three manifestations are the main symptoms of a leaking injector. As this failure can bring on more significant engine complications on your car, we made a decision to publish this article to help you verify the failure of a leaking injector and treat it properly. To do this, we will first look into the case of gasoline injectors and then at those of diesel injectors Mazda CX 3.
Leaking injector on my petrol Mazda CX 3
It is crucial 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 Mazda CX 3: The different leaks
It should be known that injector leaks on a Mazda CX 3 equipped with a petrol engine are rather infrequent. This is as a result of 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 conceivable 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 appear from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Mazda CX 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 CX 3: The different leaks
In the case of leaking diesel injectors on your Mazda CX 3, there are three several kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform with time, commonly the leak will be at the clamping point. - Injector return leakage:
As its name indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mazda CX 3 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 annoying, 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 presence of oil leaking on your Mazda CX 3.
Leaking injector on my Mazda CX 3, how to fix the leak
And finally, we’re going to look into how to fix a leaking injector on your car. Oftentimes a leak is linked, as we have seen prior to this, to a worn seal because of the pressures endured. But think that the pressure in the circuit is gigantic, especially on diesel engines. So you will have to take some safety 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.
Relating to the repair part of your leak, it will oftentimes be restricted to replacing the seals that have failed:
- Find out the source of the leak
- Take apart the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in accordance with the manufacturer’s standards.
In all situations, these interventions are not automatically complex, but if you have the slightest hesitation in the treatment of your injector that leaks on your Mazda CX 3, we encourage you to get closer to your mechanic to avoid any bad handling that could critically harm the condition of your Mazda CX 3.
To find more tips on the Mazda CX 3, take a look at the Mazda CX 3 category.
