Whenever you are informed of abnormal signs on your automobile, you are right to be preoccupied, because a car represents a big annual budget and unforeseen malfunctions don’t reduce the bill. So what if you think that you have a leaking injector on your Mazda MX 5 Miata? You almost certainly figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or strange black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can produce more severe engine trouble on your car, we chose to prepare this article to help you confirm the failure of a leaking injector and deal with it properly. To accomplish this, we will initially take a look at the case of gasoline injectors and then at those of diesel injectors Mazda MX 5 Miata.
Leaking injector on my petrol Mazda MX 5 Miata
It is important to know that the injectors on petrol and diesel engines are different, in reality, the difference in combustion between these two types of engines makes the injection different. The key 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 MX 5 Miata: The different leaks
It should be mentioned that injector leaks on a Mazda MX 5 Miata equipped with a petrol engine are pretty infrequent. This is due to the much lower pressure in the petrol intake systems. However, there are two types 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 experience 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 previously.
Leaking injector on my diesel Mazda MX 5 Miata
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 MX 5 Miata: The different leaks
In the case of leaking diesel injectors on your Mazda MX 5 Miata, there are three several types of leaks:
- Leakage from the injector inlet:
In this instance, it is an inlet pipe that will deform after a while, usually the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Mazda MX 5 Miata 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 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 examining you have oil leaking but it does not come from your injectors, we suggest you to consult this article on the presence of oil leaking on your Mazda MX 5 Miata.
Leaking injector on my Mazda MX 5 Miata, how to fix the leak
And finally, we’re going to take a look at how to fix a leaking injector on your car. Frequently a leak is associated, as we have seen sooner, to a worn seal as a result of the pressures endured. But think that the pressure in the circuit is monumental, specifically on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is carried out…
- 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 very often be restricted to swapping 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 accordance with the manufacturer’s standards.
In all situations, these interventions are not necessarily complex, but if you have the tiniest doubt in the treatment of your injector that leaks on your Mazda MX 5 Miata, we suggest you to get closer to your mechanic to avoid any bad handling that could critically harm the condition of your Mazda MX 5 Miata.
Whenever you have any additional questions about the Mazda MX 5 Miata, do not hesitate to consult our Mazda MX 5 Miata category.
