Whenever you are informed of abnormal signs on your automobile, you are right to be concerned, because a car represents a massive annual budget and unpredicted malfunctions don’t lower the expenses. So what if you find that you have a leaking injector on your Mazda CX 5? You probably figured it out thanks to black/oily drips along your engine unit, or a disturbed idle, or uncommon black smoke. These three signs of illness are the main symptoms of a leaking injector. As this troubles can cause more critical engine trouble on your car, we made a decision to publish this content page to help you verify the failure of a leaking injector and treat it properly. To achieve this, we will first of all look at the case of gasoline injectors and then at those of diesel injectors Mazda CX 5.
Leaking injector on my petrol Mazda CX 5
It is vital to know that the injectors on petrol and diesel engines are distinct, in fact, the difference in combustion between these two kind of engines makes the injection distinct. The main 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 CX 5: The different leaks
It should be known that injector leaks on a Mazda CX 5 equipped with a petrol engine are rather infrequent. This is caused by 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 possible that you have a leak from the top of the injector, this is the component that is connected 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 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 5
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system creates 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 5: The different leaks
In the case of leaking diesel injectors on your Mazda CX 5, there are three different kind of leaks:
- Leakage from the injector inlet:
In this instance, 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 5 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 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 verifying you have oil leaking but it does not come from your injectors, we suggest you to consult this content page on the existence of oil leaking on your Mazda CX 5.
Leaking injector on my Mazda CX 5, how to fix the leak
And to finish, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen previously, to a worn seal caused by the pressures endured. But think that the pressure in the circuit is enormous, especially on diesel engines. So you will have to take some precautions:
- 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.
Relating to the repair part of your leak, it will oftentimes be restricted to replacing the seals that have failed:
- Find 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 respect with the manufacturer’s standards.
In all situations, these interventions are not specifically very hard, but if you have the smallest hesitation in the treatment of your injector that leaks on your Mazda CX 5, we suggest you to get closer to your mechanic to avoid any bad handling that could seriously harm the condition of your Mazda CX 5.
If you have any further questions about the Mazda CX 5, do not hesitate to consult our Mazda CX 5 category.
