Whenever you are alert of abnormal signs on your vehicle, you are right to be concerned, because a car represents a big annual budget and unexpected breakdowns don’t reduce the costs. So what if you think that you have a leaking injector on your Mazda CX 30? You probably figured it out thanks to black/oily drips along your engine unit, or a troubled idle, or abnormal black smoke. These three manifestations are the main indicators of a leaking injector. As this problem can cause more severe engine concerns on your car, we made a decision to prepare this content to help you confirm the failure of a leaking injector and handle it correctly. To achieve this, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Mazda CX 30.
Leaking injector on my petrol Mazda CX 30
It is vital to know that the injectors on petrol and diesel engines are different, the truth is, the difference in combustion between these two kind of engines makes the injection different. The essential 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 30: The different leaks
It should be mentioned that injector leaks on a Mazda CX 30 equipped with a petrol engine are rather rare. This is due to 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 part 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 come from the junction with the engine and not with the rail as seen previously.
Leaking injector on my diesel Mazda CX 30
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Mazda CX 30: The different leaks
In the case of leaking diesel injectors on your Mazda CX 30, there are three different kind of leaks:
- Leakage from the injector inlet:
In cases like this, it is an inlet pipe that will deform over time, usually 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 CX 30 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 experience 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 content on the existence of oil leaking on your Mazda CX 30.
Leaking injector on my Mazda CX 30, how to fix the leak
And to finish, we’re going to 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 as a result 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 precautions:
- Lower the pressure before any work is completed…
- 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 regularly be limited to changing the seals that have failed:
- Identify the source of the leak
- Dismantle the injector in question
- Replace 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 tiniest uncertainty in the treatment of your injector that leaks on your Mazda CX 30, we encourage you to get closer to your auto mechanic to avoid any bad handling that could significantly harm the condition of your Mazda CX 30.
If you have any additional questions about the Mazda CX 30, do not hesitate to consult our Mazda CX 30 category.
