Whenever you are informed of unusual symptoms on your vehicle, you are right to be intrigued, because a car represents a big annual budget and unexpected breakdowns don’t reduce the bill. So what if you think that you have a leaking injector on your Toyota Hilux? You almost certainly figured it out thanks to black/oily drips along your engine, or a disturbed idle, or unconventional black smoke. These three signs of illness are the main signals of a leaking injector. As this troubles can bring about more severe engine problems on your car, we thought we would publish this content page to help you ensure the failure of a leaking injector and treat it correctly. To achieve this, we will first of all check out the case of gasoline injectors and then at those of diesel injectors Toyota Hilux.

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Leaking injector on my petrol Toyota Hilux

It is fundamental to know that the injectors on petrol and diesel engines are distinct, the reality is, the difference in combustion between these two sort 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 Toyota Hilux: The different leaks

It should be known that injector leaks on a Toyota Hilux equipped with a petrol engine are pretty infrequent. This is as a result of the much lower pressure in the petrol intake systems. However, there are two sort 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:
    At last, 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 Toyota Hilux

Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion system 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 Toyota Hilux: The different leaks

In the case of leaking diesel injectors on your Toyota Hilux, there are three different sort of leaks:

  • Leakage from the injector inlet:
    In this case, 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 indicates, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Toyota Hilux will be caused by 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 encounter 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 read this content page on the presence of oil leaking on your Toyota Hilux.

Leaking injector on my Toyota Hilux, how to fix the leak

And to finish, we’re going to check out how to fix a leaking injector on your car. Regularly a leak is associated, as we have seen previously, to a worn seal due to the pressures endured. But think that the pressure in the circuit is gigantic, specifically on diesel engines. So you will have to take some safety measures:

  • Lower the pressure before any work is completed…
  • Covering 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 frequently be restricted 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 assembly and tighten with a torque wrench in respect with the manufacturer’s standards.

In all cases, these interventions are not automatically complicated, but if you have the smallest doubt in the treatment of your injector that leaks on your Toyota Hilux, we suggest you to get closer to your motor mechanic to avoid any bad handling that could significantly harm the condition of your Toyota Hilux.

If you need more guides on the Toyota Hilux, go to our Toyota Hilux category.